首页 > 最新文献

Chemical Industry & Chemical Engineering Quarterly最新文献

英文 中文
Thermodynamic modeling of gas solubility in ionic liquids using equations of state 用状态方程对离子液体中气体溶解度进行热力学模拟
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq220417028c
Lucas Cardoso, Bruno Conceição, M. Paredes, S. Mattedi
This work aimed at the thermodynamic modeling of gases solubility in ILs using the SRK, CPA, and PC-SAFT. Wherefore, routines were developed for the parameterization of ILs. Implementations of the ILs were carried out in the Aspen Plus simulator, to evaluate the EoS and explore the phase equilibrium data with the predictive equations and with the correlation of the binary interaction parameter. Hence, it was verified the correlation of the density and speed of sound curves presented limitations to correct the slope of the curves of pure ILs. Nonetheless, PC-SAFT with the 4C associative scheme demonstrated a better fit for the thermophysical properties. As for the prediction of phase equilibrium, for the [EMIM][TfO], the PC-SAFT with the 2B scheme showed a better fit with CO2, while the CPA with the 2B scheme presented the best result for the H2S. For [OMIM][NTf2], PC-SAFT with 1A scheme showed better results with CO2, and CPA with 2B scheme showed the lowest deviation with H2S.
这项工作旨在利用SRK, CPA和PC-SAFT对气体在ILs中的溶解度进行热力学建模。因此,开发了il参数化的例程。利用预测方程和二元相互作用参数的相关性,在Aspen Plus模拟器上对模型进行了验证,并对相平衡数据进行了研究。因此,验证了密度与声速曲线的相关性对修正纯声速曲线的斜率存在局限性。尽管如此,采用4C结合方案的PC-SAFT表现出更好的热物理性质。在相平衡预测方面,对于[EMIM][TfO], 2B方案的PC-SAFT对CO2的拟合效果较好,而2B方案的CPA对H2S的拟合效果最好。对于[OMIM][NTf2], 1A方案的PC-SAFT对CO2的处理效果较好,2B方案的CPA对H2S的处理偏差最小。
{"title":"Thermodynamic modeling of gas solubility in ionic liquids using equations of state","authors":"Lucas Cardoso, Bruno Conceição, M. Paredes, S. Mattedi","doi":"10.2298/ciceq220417028c","DOIUrl":"https://doi.org/10.2298/ciceq220417028c","url":null,"abstract":"This work aimed at the thermodynamic modeling of gases solubility in ILs using the SRK, CPA, and PC-SAFT. Wherefore, routines were developed for the parameterization of ILs. Implementations of the ILs were carried out in the Aspen Plus simulator, to evaluate the EoS and explore the phase equilibrium data with the predictive equations and with the correlation of the binary interaction parameter. Hence, it was verified the correlation of the density and speed of sound curves presented limitations to correct the slope of the curves of pure ILs. Nonetheless, PC-SAFT with the 4C associative scheme demonstrated a better fit for the thermophysical properties. As for the prediction of phase equilibrium, for the [EMIM][TfO], the PC-SAFT with the 2B scheme showed a better fit with CO2, while the CPA with the 2B scheme presented the best result for the H2S. For [OMIM][NTf2], PC-SAFT with 1A scheme showed better results with CO2, and CPA with 2B scheme showed the lowest deviation with H2S.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of different electrolytes on electrochemical micro-machining of SS 316L 不同电解液对ss316l微细电解加工的影响
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq211204007v
J. R. Vinod Kumaar, R. Thanigaivelan, Madesh Soundarrajan
The use of stainless steel 316L (SS 316L) in industries such as medical, marine, aerospace, bio-medical, and automobile sectors is increasing rapidly. Electrochemical micro-machining (ECMM) is the apt method for machining SS 316L due to its burr-free machining surface, no residual stress, and high precision. However, there are some limitations found in the usage of strong electrolytes such as HCl, H2SO4, KOH, NaNO3, and NaCl, which are reportedly facing difficulties in disposing it to the environment and handling issues. Hence, this paper addresses to overcome the disadvantages faced in ECMM process when using strong electrolytes to machine SS 316L, so therefore different organic electrolytes such as tartaric acid (C4H6O6), citric acid (C6H8O7), and a combination of tartaric and citric acid electrolyte (mixed electrolyte) are considered to select the best electrolyte. Process parameters like machining voltage, duty cycle, and electrolyte concentration are included in determining the performance of machining. The performance of ECMM is evaluated using material removal rate (MRR) and overcut. The overcut of tartaric acid electrolyte is found to be 179% less than mixed electrolyte for the parameter combination of 12 g/l, 11 V, and 85%. The mixed electrolyte shows 114.2% higher MRR than the tartaric acid electrolyte for the parameter solutions of 25%, 11 V, and 20 g/l. Furthermore, the citric acid electrolyte shows the second lowest overcut and higher MRR in all aspects of machining performance. Field emission scanning electron microscope (FESEM) studies are carried out to realise the effect of electrolyte on the machining surface.
不锈钢316L (SS 316L)在医疗、船舶、航空航天、生物医学和汽车等行业的使用正在迅速增加。电化学微加工(ECMM)具有加工表面无毛刺、无残余应力、加工精度高等优点,是加工不锈钢316L的理想方法。然而,在使用HCl、H2SO4、KOH、NaNO3、NaCl等强电解质方面存在一些局限性,据报道,这些强电解质在向环境中排放和处理方面存在困难。因此,为了克服ECMM工艺中使用强电解质加工SS 316L的缺点,本文考虑了酒石酸(C4H6O6)、柠檬酸(C6H8O7)等不同有机电解质,以及酒石酸和柠檬酸电解质的组合(混合电解质)来选择最佳电解质。加工电压、占空比、电解液浓度等工艺参数决定了加工性能。ECMM的性能是通过材料去除率(MRR)和超切来评估的。酒石酸电解质在12 g/l、11 V、85%的参数组合下,其过切量比混合电解质小179%。在25%、11 V、20 g/l的参数溶液下,混合电解质的MRR比酒石酸电解质高114.2%。此外,柠檬酸电解质在加工性能的各个方面都显示出第二低的过切和更高的MRR。通过场发射扫描电镜(FESEM)研究了电解液对加工表面的影响。
{"title":"Effect of different electrolytes on electrochemical micro-machining of SS 316L","authors":"J. R. Vinod Kumaar, R. Thanigaivelan, Madesh Soundarrajan","doi":"10.2298/ciceq211204007v","DOIUrl":"https://doi.org/10.2298/ciceq211204007v","url":null,"abstract":"The use of stainless steel 316L (SS 316L) in industries such as medical, marine, aerospace, bio-medical, and automobile sectors is increasing rapidly. Electrochemical micro-machining (ECMM) is the apt method for machining SS 316L due to its burr-free machining surface, no residual stress, and high precision. However, there are some limitations found in the usage of strong electrolytes such as HCl, H2SO4, KOH, NaNO3, and NaCl, which are reportedly facing difficulties in disposing it to the environment and handling issues. Hence, this paper addresses to overcome the disadvantages faced in ECMM process when using strong electrolytes to machine SS 316L, so therefore different organic electrolytes such as tartaric acid (C4H6O6), citric acid (C6H8O7), and a combination of tartaric and citric acid electrolyte (mixed electrolyte) are considered to select the best electrolyte. Process parameters like machining voltage, duty cycle, and electrolyte concentration are included in determining the performance of machining. The performance of ECMM is evaluated using material removal rate (MRR) and overcut. The overcut of tartaric acid electrolyte is found to be 179% less than mixed electrolyte for the parameter combination of 12 g/l, 11 V, and 85%. The mixed electrolyte shows 114.2% higher MRR than the tartaric acid electrolyte for the parameter solutions of 25%, 11 V, and 20 g/l. Furthermore, the citric acid electrolyte shows the second lowest overcut and higher MRR in all aspects of machining performance. Field emission scanning electron microscope (FESEM) studies are carried out to realise the effect of electrolyte on the machining surface.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of excess brines disposal methods at potash mining and processing plants 钾肥开采和加工厂多余盐水处理方法的优化
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq211228024s
P. Shcherban, A. Gapchich, Aleksey Zhdanov, Olga Letunovskaya
The paper analyzes the positive and negative aspects of various technological solutions of the liquid brines use during the development of polymineral potash ore deposits, considers the problem of determining the choice of the optimal approach by taking into account geological, technical, environmental, and financial factors. The study of the issues of utilization and reduction of the liquid brines components of discharges in the production of potash fertilizers, the simultaneous reduction of valuable components loss with liquid discharges, and, due to this, increasing the production of potash fertilizers, and also the usage in the technology of mine brines, are an urgent and important scientific and engineering challenge of the potash industry. Technologically, several alternative solutions are possible to reduce the number of liquid by-products placed in sludge storages. A set of analytical methods was used in the work, including statistical data processing, modeling, pre-design studies of technological solutions, and assessment of economic costs. Excess brines of potash mining and processing plants are liquid waste obtained during the production of potashfertilizers - MOP ? SOP. The accumulation of excess brines in sludge storage facilities is estimated at millions of cubic meters per year. The expansion of the sludge storage facilities area and the construction of dams are only a temporary solution and associated with risks in design, construction, and operation of hydraulic structures, increasing the risks of brine leakage into open and underground water basins. This makes it necessary to use other methods of brine disposal. Depending on the nature of the processed polymineral potash ores, several methods can be used in combination for the the disposal of excess brines at once: backfiling, osmosis, injection into deep horizons, multistage evaporation. The most optimal combination of brine reduction technologies for potassium-magnesium processing plants raw materials is the following : 60% is disposed by usage of vacuum evaporation units , 20 % - by injecting excessive brines into deep absorbing horizons, 10-20% should be used for backfilling or production of additional products.
本文分析了在多矿物钾肥矿床开发过程中使用液态盐水的各种技术方案的优缺点,探讨了综合考虑地质、技术、环境和财政等因素确定最佳方案的问题。研究钾肥生产中废液卤水组分的利用和减少问题,同时减少废液中有价组分的损失,从而增加钾肥的产量,并在矿用卤水技术中加以利用,是钾肥工业面临的一项紧迫而重要的科学和工程挑战。从技术上讲,有几种替代解决方案可以减少放置在污泥储存库中的液体副产品的数量。在这项工作中使用了一套分析方法,包括统计数据处理、建模、技术解决方案的预先设计研究和经济成本评估。钾肥开采和加工厂多余的卤水是在生产钾肥过程中产生的废液。SOP。据估计,每年在污泥储存设施中积累的过量卤水达数百万立方米。污泥储存设施面积的扩大和大坝的建设只是一种临时解决方案,并且与水工建筑物的设计、施工和运营风险有关,增加了卤水泄漏到露天和地下水流域的风险。这就有必要采用其他方法处理卤水。根据所处理的多矿物钾盐矿石的性质,有几种方法可以联合使用,一次性处理多余的卤水:回填、渗透、注入深层、多级蒸发。钾镁加工厂原料卤水还原技术的最佳组合为:60%采用真空蒸发装置处理,20%通过向深层吸收层注入过量卤水处理,10-20%用于回填或生产附加产品。
{"title":"Optimization of excess brines disposal methods at potash mining and processing plants","authors":"P. Shcherban, A. Gapchich, Aleksey Zhdanov, Olga Letunovskaya","doi":"10.2298/ciceq211228024s","DOIUrl":"https://doi.org/10.2298/ciceq211228024s","url":null,"abstract":"The paper analyzes the positive and negative aspects of various technological solutions of the liquid brines use during the development of polymineral potash ore deposits, considers the problem of determining the choice of the optimal approach by taking into account geological, technical, environmental, and financial factors. The study of the issues of utilization and reduction of the liquid brines components of discharges in the production of potash fertilizers, the simultaneous reduction of valuable components loss with liquid discharges, and, due to this, increasing the production of potash fertilizers, and also the usage in the technology of mine brines, are an urgent and important scientific and engineering challenge of the potash industry. Technologically, several alternative solutions are possible to reduce the number of liquid by-products placed in sludge storages. A set of analytical methods was used in the work, including statistical data processing, modeling, pre-design studies of technological solutions, and assessment of economic costs. Excess brines of potash mining and processing plants are liquid waste obtained during the production of potashfertilizers - MOP ? SOP. The accumulation of excess brines in sludge storage facilities is estimated at millions of cubic meters per year. The expansion of the sludge storage facilities area and the construction of dams are only a temporary solution and associated with risks in design, construction, and operation of hydraulic structures, increasing the risks of brine leakage into open and underground water basins. This makes it necessary to use other methods of brine disposal. Depending on the nature of the processed polymineral potash ores, several methods can be used in combination for the the disposal of excess brines at once: backfiling, osmosis, injection into deep horizons, multistage evaporation. The most optimal combination of brine reduction technologies for potassium-magnesium processing plants raw materials is the following : 60% is disposed by usage of vacuum evaporation units , 20 % - by injecting excessive brines into deep absorbing horizons, 10-20% should be used for backfilling or production of additional products.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"10 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Green chemical production based on thermal cracking of inedible vegetable oil 基于非食用植物油热裂解的绿色化工生产
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq220114033c
Vanderlei Costa, L. Chiarello, V. Botton, E. Simionatto, V. Wiggers, H. Meier, Laercio Ender
This work evaluated the process for heptaldehyde, undecylenic acid and methyl undecenoate production from castor oil, methyl ester of castor oil and ricinoleic acid. Experiments were performed in a continuous pilot-plant scale pyrolysis reactor. Those are very important green chemical products that might be obtained by the thermal cracking of castor oil. Transesterification of castor oil produces methyl ricinoleate and its thermal cracking generates methyl undecenoate and heptaldehyde. The pyrolysis temperatures tested were 530, 545, 560, and 575 ?C, with residence time from 17 to 32 s and mass flow at 400 g/h of the mixture of materials with 25% distilled water. It was observed that the temperature influence in relation to bio-oil generated and their differences for each material. The bio-oil was characterized by iodine index, acid number, mass, and the contents of its compounds were obtained by GC-FID chromatography. The best result for the undecylenic acid mass yield of the desired compounds occurred at 530?C, achieving 17.8 % from ricinoleic acid and 16.5% from castor oil. For the heptaldehyde the highest production was also obtained at 530 ?C, with a value of 20.7% from methyl ester and 15.2% from ricinoleic acid.
本研究评价了以蓖麻油、蓖麻油甲酯和蓖麻油酸为原料生产七醛、十一烯酸和十一烯酸甲酯的工艺。实验在连续中试规模热解反应器中进行。这些都是蓖麻油热裂解可获得的重要绿色化工产品。蓖麻油酯交换反应生成蓖麻油酸甲酯,热裂解生成十一酸甲酯和七醛。热解温度分别为530、545、560和575℃,停留时间为17 ~ 32 s,质量流量为400 g/h,蒸馏水浓度为25%。观察了温度对生物油生成的影响及其对每种材料的差异。用碘指数、酸值、质量对生物油进行了表征,并用GC-FID色谱法测定了生物油中化合物的含量。所需化合物十一烯酸质量产率的最佳结果出现在530?C,从蓖麻油酸中获得17.8%,从蓖麻油中获得16.5%。在530℃时,七醛的产率最高,甲酯产率为20.7%,蓖麻油酸产率为15.2%。
{"title":"Green chemical production based on thermal cracking of inedible vegetable oil","authors":"Vanderlei Costa, L. Chiarello, V. Botton, E. Simionatto, V. Wiggers, H. Meier, Laercio Ender","doi":"10.2298/ciceq220114033c","DOIUrl":"https://doi.org/10.2298/ciceq220114033c","url":null,"abstract":"This work evaluated the process for heptaldehyde, undecylenic acid and methyl undecenoate production from castor oil, methyl ester of castor oil and ricinoleic acid. Experiments were performed in a continuous pilot-plant scale pyrolysis reactor. Those are very important green chemical products that might be obtained by the thermal cracking of castor oil. Transesterification of castor oil produces methyl ricinoleate and its thermal cracking generates methyl undecenoate and heptaldehyde. The pyrolysis temperatures tested were 530, 545, 560, and 575 ?C, with residence time from 17 to 32 s and mass flow at 400 g/h of the mixture of materials with 25% distilled water. It was observed that the temperature influence in relation to bio-oil generated and their differences for each material. The bio-oil was characterized by iodine index, acid number, mass, and the contents of its compounds were obtained by GC-FID chromatography. The best result for the undecylenic acid mass yield of the desired compounds occurred at 530?C, achieving 17.8 % from ricinoleic acid and 16.5% from castor oil. For the heptaldehyde the highest production was also obtained at 530 ?C, with a value of 20.7% from methyl ester and 15.2% from ricinoleic acid.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Obtaining xylitol by hydrolysis-hydrogenation of liquors derived from sugarcane bagasse 蔗渣液水解加氢制备木糖醇
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq210721012c
Julieta Cerioni, M. Vallejos, F. Felissia, M. Area, N. Nichio, G. Santori
This work presents the study of heterogeneous catalysis of sugarcane bagasse hydrothermal treatment spent liquors using a sulfonated resin. Besides, results were compared with those obtained by a conventional route using sulfuric acid as a homogeneous catalyst. Heterogeneous catalysis is suitable for the hydrolysis of sugarcane bagasse hydrothermal liquors under mild conditions (100 ?C and 6 h). The obtained maximum xylose yield was 82% due to furfural formation, which causes a xylose selectivity drop. The hydrogenation of this xylose-rich liquor at 100?C and 3 MPa of hydrogen pressure employing a supported Ni/?-Al2O3 produced the total conversion of xylose with a selectivity towards xylitol of 100% by using a catalyst to xylose mass ratio of 0.5. Heterogeneous catalysis in a two-step route (hydrolysis and hydrogenation) constitutes an outstanding alternative to produce xylitol from sugarcane bagasse hydrothermal spent liquors since materials can be easily separated and reused in several reaction cycles.
采用磺化树脂对蔗渣水热处理废液进行了多相催化研究。此外,还比较了以硫酸为均相催化剂的常规方法的反应结果。多相催化适用于蔗渣水热液在温和条件下(100℃,6 h)水解,由于糠醛的生成导致木糖选择性下降,木糖产率最高可达82%。这种富含木糖的液体在100?C和3mpa的氢气压力,采用Ni/?在催化剂与木糖质量比为0.5的条件下,-Al2O3对木糖的总转化率为100%。两步法(水解和加氢)的多相催化是蔗渣水热废液生产木糖醇的一种很好的替代方法,因为材料可以很容易地在几个反应循环中分离和重复使用。
{"title":"Obtaining xylitol by hydrolysis-hydrogenation of liquors derived from sugarcane bagasse","authors":"Julieta Cerioni, M. Vallejos, F. Felissia, M. Area, N. Nichio, G. Santori","doi":"10.2298/ciceq210721012c","DOIUrl":"https://doi.org/10.2298/ciceq210721012c","url":null,"abstract":"This work presents the study of heterogeneous catalysis of sugarcane bagasse hydrothermal treatment spent liquors using a sulfonated resin. Besides, results were compared with those obtained by a conventional route using sulfuric acid as a homogeneous catalyst. Heterogeneous catalysis is suitable for the hydrolysis of sugarcane bagasse hydrothermal liquors under mild conditions (100 ?C and 6 h). The obtained maximum xylose yield was 82% due to furfural formation, which causes a xylose selectivity drop. The hydrogenation of this xylose-rich liquor at 100?C and 3 MPa of hydrogen pressure employing a supported Ni/?-Al2O3 produced the total conversion of xylose with a selectivity towards xylitol of 100% by using a catalyst to xylose mass ratio of 0.5. Heterogeneous catalysis in a two-step route (hydrolysis and hydrogenation) constitutes an outstanding alternative to produce xylitol from sugarcane bagasse hydrothermal spent liquors since materials can be easily separated and reused in several reaction cycles.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effects of microalgal concentration and pH with flocculant on microfiltration 微藻浓度和pH对絮凝剂微滤的影响
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq220125032m
A. Mendes, Jefferson de Oliveira Daimon, Thamayne Valadares de Oliveira, Fernando Pederson Voll, R. Vieira, A. Mariano
To make algal biomass a suitable feedstock for fuel and bioproducts, a practical way of dewatering and concentrating algal cells must be devised. In this study, a system comprising microfiltration membranes combined with a flocculant was developed on a low-cost ceramic substrate for efficient harvest of Tetradesmus obliquus. The effects of tannin-based flocculant concentration, microalgal concentration, and pH on microfiltration were studied. Permeate flux was evaluated for 5400 s through experiments to analyze the total resistance and the fouling mechanism. Results show that the cake filtration model best represented the data. The experiments at pH 4 and 0.06 kg/m3 of microalgae (with flocculant) showed improved results with reduction in J/J0 (permeate flux/initial flux) of 39%. In addition, the effects of critical flux, transmembrane pressure, and fouling mechanism on microfiltration were investigated under the best conditions studied. Application of the stepping method to the critical flux yielded permeate flux of 2.2 ? 10-5 m3m?2s?1. The 70 kPa condition showed the highest permeate flux (3.0 ? 10?5 m3m?2s?1) and a low cake pore blocking coefficient (k) obtained by the modified Hermia model. This study showed that the use of Tanfloc at low pH can maximize microalgal separation in membrane processes.
为了使藻类生物量成为燃料和生物产品的合适原料,必须设计一种实用的方法来脱水和浓缩藻类细胞。在本研究中,在低成本的陶瓷基板上开发了一种由微滤膜和絮凝剂组成的系统,用于高效收获斜四角蝇。研究了单宁基絮凝剂浓度、微藻浓度和pH对微滤的影响。通过实验计算了5400s的渗透通量,分析了总阻力和结垢机理。结果表明,饼式过滤模型最能反映数据。在pH为4和0.06 kg/m3的微藻(添加絮凝剂)条件下进行的实验结果表明,微藻的渗透通量/初始通量降低了39%。在最佳条件下,考察了临界通量、跨膜压力和污染机理对微滤的影响。将步进法应用于临界通量,得到渗透通量为2.2 ?纯m3m 2 s ? 1。70 kPa条件下渗透通量最高,为3.0 ?10?5 m3m?2s?1),通过改进的Hermia模型获得了较低的饼孔阻塞系数(k)。本研究表明,在低pH下使用Tanfloc可以最大限度地分离膜工艺中的微藻。
{"title":"Effects of microalgal concentration and pH with flocculant on microfiltration","authors":"A. Mendes, Jefferson de Oliveira Daimon, Thamayne Valadares de Oliveira, Fernando Pederson Voll, R. Vieira, A. Mariano","doi":"10.2298/ciceq220125032m","DOIUrl":"https://doi.org/10.2298/ciceq220125032m","url":null,"abstract":"To make algal biomass a suitable feedstock for fuel and bioproducts, a practical way of dewatering and concentrating algal cells must be devised. In this study, a system comprising microfiltration membranes combined with a flocculant was developed on a low-cost ceramic substrate for efficient harvest of Tetradesmus obliquus. The effects of tannin-based flocculant concentration, microalgal concentration, and pH on microfiltration were studied. Permeate flux was evaluated for 5400 s through experiments to analyze the total resistance and the fouling mechanism. Results show that the cake filtration model best represented the data. The experiments at pH 4 and 0.06 kg/m3 of microalgae (with flocculant) showed improved results with reduction in J/J0 (permeate flux/initial flux) of 39%. In addition, the effects of critical flux, transmembrane pressure, and fouling mechanism on microfiltration were investigated under the best conditions studied. Application of the stepping method to the critical flux yielded permeate flux of 2.2 ? 10-5 m3m?2s?1. The 70 kPa condition showed the highest permeate flux (3.0 ? 10?5 m3m?2s?1) and a low cake pore blocking coefficient (k) obtained by the modified Hermia model. This study showed that the use of Tanfloc at low pH can maximize microalgal separation in membrane processes.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Energy analysis of the convective drying of iron ore fines 铁矿细粒对流干燥的能量分析
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq220208026s
A. S. Souza, Pinto Souza, A. M. Sarkis, T. F. Pádua, R. Béttega
Drying operations in iron ore processing plants have a particularly high energy demand due to the massive solid flow rates employed in this industry. A 33 full-factorial design was applied to investigate the effects of air temperature, airflow velocity, and solids load on the drying time and the specific energy consumption (SEC) of the convective drying of iron ore fines in a fixed bed. The results demonstrated that each drying air condition was associated with an optimal solids load that minimized the SEC. A load of 73 g (bed height of about 0.8 cm) was identified and validated as the optimal condition in terms of energy consumption for the configuration with the highest air temperature (90?C) and airflow velocity (4.5 m/s). This condition resulted in a drying time of 29.0 s and a corresponding SEC of 12.8 MJ/kg to reduce the solids moisture content from 0.11 to a target of 0.05 kg water/kg dry solids. The approach presented here for identifying the optimum values for the process variables should assist in the design and operation of energy efficient convective dryers for iron ore fines.
由于该行业采用了大量的固体流,因此铁矿石加工厂的干燥操作具有特别高的能源需求。采用33全因子设计,研究了空气温度、气流速度和固体载荷对固定床铁矿粉对流干燥时间和比能耗(SEC)的影响。结果表明,每种干燥空气条件都与最大限度地减少SEC的最佳固体负荷相关。在最高空气温度(90°C)和气流速度(4.5 m/s)的配置中,负荷为73 g(床高约0.8 cm)被确定并验证为能耗的最佳条件。在这种条件下,干燥时间为29.0 s,相应的SEC为12.8 MJ/kg,将固体含水量从0.11降低到0.05 kg水/kg干固体的目标。本文提出的确定过程变量的最佳值的方法应有助于设计和操作高效对流干燥机的铁矿粉。
{"title":"Energy analysis of the convective drying of iron ore fines","authors":"A. S. Souza, Pinto Souza, A. M. Sarkis, T. F. Pádua, R. Béttega","doi":"10.2298/ciceq220208026s","DOIUrl":"https://doi.org/10.2298/ciceq220208026s","url":null,"abstract":"Drying operations in iron ore processing plants have a particularly high energy demand due to the massive solid flow rates employed in this industry. A 33 full-factorial design was applied to investigate the effects of air temperature, airflow velocity, and solids load on the drying time and the specific energy consumption (SEC) of the convective drying of iron ore fines in a fixed bed. The results demonstrated that each drying air condition was associated with an optimal solids load that minimized the SEC. A load of 73 g (bed height of about 0.8 cm) was identified and validated as the optimal condition in terms of energy consumption for the configuration with the highest air temperature (90?C) and airflow velocity (4.5 m/s). This condition resulted in a drying time of 29.0 s and a corresponding SEC of 12.8 MJ/kg to reduce the solids moisture content from 0.11 to a target of 0.05 kg water/kg dry solids. The approach presented here for identifying the optimum values for the process variables should assist in the design and operation of energy efficient convective dryers for iron ore fines.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Modeling and simulation of the biosurfactant production by enzymatic route using xylose and oleic acid as reagents 以木糖和油酸为试剂,酶法生产生物表面活性剂的建模与仿真
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq210621001c
Ana Bárbara Moulin Cansian, P. Tardioli, F. Furlan, R. de Sousa
The biosynthesis of sugar esters, molecules with biosurfactant properties, can occur through the esterification of sugars with fatty acids by enzymatic catalysis. An alternative to reduce the impact of raw materials on the final cost of biosurfactant production and reuse industrial waste is to use residues from vegetable oil industries as source of FFA (Free Fatty Acid, such as oleic acid) and lignocellulosic residues of 2G ethanol as source of sugar (xylose). In this scenario, the present work aimed to model the production process of biosurfactants via heterogeneous biocatalysis by lipase, using oleic acid and xylose. Product separation and purification was performed using a sequence of precipitations (by adding ethanol, water and methyl ethyl ketone). Simulation was performed using the equation-oriented software EMSO (Environment for Modeling, Simulation and Optimization), which is CAPE-OPEN compliant. The percentage of biosurfactants in the product was around 86%, with recovery of 88% in the purification. Regarding the study of energy expenditure, it was observed a value of -604.1 kW of heat associated with cooling and a value of 137.6 kW associated with heating. Developed mathematical models successfully described the process. The initial economic analysis of the process indicates a minimum biosurfactant selling price of US$72.37/kg.
糖酯(具有生物表面活性剂性质的分子)的生物合成可以通过酶催化糖与脂肪酸的酯化反应发生。减少原料对生物表面活性剂生产最终成本的影响和工业废物再利用的一种替代方法是使用植物油工业的残留物作为FFA(游离脂肪酸,如油酸)的来源,并使用2G乙醇的木质纤维素残留物作为糖(木糖)的来源。在这种情况下,本研究旨在模拟脂肪酶在油酸和木糖的非均相生物催化下生产生物表面活性剂的过程。采用一系列沉淀法(加入乙醇、水和甲乙基酮)对产物进行分离和纯化。仿真使用符合CAPE-OPEN标准的面向方程的软件EMSO (Environment for Modeling, Simulation and Optimization)进行。产物中生物表面活性剂的含量约为86%,纯化回收率为88%。关于能源消耗的研究,观察到与冷却有关的热量值为-604.1千瓦,与加热有关的热量值为137.6千瓦。建立的数学模型成功地描述了这一过程。对该工艺的初步经济分析表明,生物表面活性剂的最低售价为72.37美元/公斤。
{"title":"Modeling and simulation of the biosurfactant production by enzymatic route using xylose and oleic acid as reagents","authors":"Ana Bárbara Moulin Cansian, P. Tardioli, F. Furlan, R. de Sousa","doi":"10.2298/ciceq210621001c","DOIUrl":"https://doi.org/10.2298/ciceq210621001c","url":null,"abstract":"The biosynthesis of sugar esters, molecules with biosurfactant properties, can occur through the esterification of sugars with fatty acids by enzymatic catalysis. An alternative to reduce the impact of raw materials on the final cost of biosurfactant production and reuse industrial waste is to use residues from vegetable oil industries as source of FFA (Free Fatty Acid, such as oleic acid) and lignocellulosic residues of 2G ethanol as source of sugar (xylose). In this scenario, the present work aimed to model the production process of biosurfactants via heterogeneous biocatalysis by lipase, using oleic acid and xylose. Product separation and purification was performed using a sequence of precipitations (by adding ethanol, water and methyl ethyl ketone). Simulation was performed using the equation-oriented software EMSO (Environment for Modeling, Simulation and Optimization), which is CAPE-OPEN compliant. The percentage of biosurfactants in the product was around 86%, with recovery of 88% in the purification. Regarding the study of energy expenditure, it was observed a value of -604.1 kW of heat associated with cooling and a value of 137.6 kW associated with heating. Developed mathematical models successfully described the process. The initial economic analysis of the process indicates a minimum biosurfactant selling price of US$72.37/kg.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"48 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Green grape marc biosorbents preparation for mercury removal in aqueous media 水介质中除汞用绿葡萄马克生物吸附剂的制备
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq201014008s
S. Del, Alvaro Maggio, Lucia Mergola
In this study, grape marc waste from Negroamaro (a South of Italy vine variety) winery production, were used for the preparation of biosorbents for Hg(II) removal in aqueous media. A green approach was used to develop a proper biosorbent through two different grape marc washing procedures. In particular, the common chloridric acid and the greener citric acid, were evaluated. Comparing the adsorption results, the biosorbent prepared using citric acid as washing agent (GM-CA) gave similar results to the biosorbent washed with HCl (GM-HCl) with a maximum adsorption capacity of 36.39 mg g-1. Isothermal studies revealed a heterogeneous physical adsorption of Hg(II) on the biosorbents. Moreover, FTIR analysis of the grape marc-based biosorbent without and with Hg(II), confirmed ionic interactions in the biosorbent that fit with a pseudo-second order kinetic model. No significant adsorption on the biosorbent was observed when two other heavy metals, copper(II) and nickel(II), previously studied for similar sorbents, were considered. Finally, reusability of GM-CA biosorbent was also demonstrated over three cycles. Thus, the green preparation approach used in this work can be considered suitable for development of grape marc-based biosorbents.
在这项研究中,利用内格罗马罗(意大利南部葡萄品种)酿酒厂生产的葡萄渣制备生物吸附剂,用于去除水介质中的汞(II)。通过两种不同的葡萄标记清洗程序,采用绿色方法开发合适的生物吸附剂。特别对普通氯酸和绿色柠檬酸进行了评价。结果表明,以柠檬酸为洗涤剂制备的生物吸附剂(GM-CA)与以盐酸洗涤的生物吸附剂(GM-HCl)的吸附效果相近,最大吸附量为36.39 mg g-1。等温研究表明,汞(II)在生物吸附剂上具有非均匀的物理吸附。此外,FTIR分析了葡萄标记物生物吸附剂中不含Hg(II)和含Hg(II)的离子相互作用,证实了生物吸附剂中的离子相互作用符合准二级动力学模型。当考虑其他两种重金属,铜(II)和镍(II)时,没有观察到生物吸附剂对类似吸附剂的显著吸附。最后,GM-CA生物吸附剂的可重复使用性也在三个循环中得到了验证。因此,本研究中采用的绿色制备方法可被认为适合于葡萄标记物基生物吸附剂的开发。
{"title":"Green grape marc biosorbents preparation for mercury removal in aqueous media","authors":"S. Del, Alvaro Maggio, Lucia Mergola","doi":"10.2298/ciceq201014008s","DOIUrl":"https://doi.org/10.2298/ciceq201014008s","url":null,"abstract":"In this study, grape marc waste from Negroamaro (a South of Italy vine variety) winery production, were used for the preparation of biosorbents for Hg(II) removal in aqueous media. A green approach was used to develop a proper biosorbent through two different grape marc washing procedures. In particular, the common chloridric acid and the greener citric acid, were evaluated. Comparing the adsorption results, the biosorbent prepared using citric acid as washing agent (GM-CA) gave similar results to the biosorbent washed with HCl (GM-HCl) with a maximum adsorption capacity of 36.39 mg g-1. Isothermal studies revealed a heterogeneous physical adsorption of Hg(II) on the biosorbents. Moreover, FTIR analysis of the grape marc-based biosorbent without and with Hg(II), confirmed ionic interactions in the biosorbent that fit with a pseudo-second order kinetic model. No significant adsorption on the biosorbent was observed when two other heavy metals, copper(II) and nickel(II), previously studied for similar sorbents, were considered. Finally, reusability of GM-CA biosorbent was also demonstrated over three cycles. Thus, the green preparation approach used in this work can be considered suitable for development of grape marc-based biosorbents.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68461121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of storage process on nutritive properties of preterm human milk 储存过程对早产儿母乳营养特性的影响
IF 1.2 4区 工程技术 Q4 CHEMISTRY, APPLIED Pub Date : 2022-01-01 DOI: 10.2298/ciceq220117021l
N. Lugonja, V. Marinković, B. Miličić, J. Avdalović, M. Vrvić, S. Spasić
Freeze storage and pasteurization of human milk are common treatments in milk banks. Thermal treatment changes the quality of milk for preterm infants? nutrition, and the aim of this paper was to examine the nutritional profile and antioxidant potential of preterm human milk after storage and pasteurization, and also after supplementation with fortifier. The effects of storage processes were estimated on mature preterm milk of 30 breastfeeding women. Total proteins, lipids and lactose were determined after thermal processing and supplementation of mature preterm milk with fortifier. The antioxidant capacity was determined using the ferric reducing antioxidant potential method and lipid peroxidation inhibition assay. Protein concentration decreased after frozen storage and pasteurization (p<0.05). Pasteurization further reduced the lipid concentration after freezing. The ferric reducing antioxidant potential decreased after thermal treatments (p<0.05). Supplementation of mature milk with fortifier increased the concentration of proteins, lipids and lactose. Our findings demonstrated that storage and pasteurization processes affect the basic nutritional composition and antioxidant capacity of preterm human milk. In order to ensure adequate nutrition for preterm infants with preterm human milk, supplementation, especially with high concentrations of proteins and lipids, is necessary after thermal treatments.
母乳冷冻储存和巴氏消毒是母乳库中常见的处理方法。热处理会改变早产儿奶的质量吗?本文的目的是研究早产儿母乳在储存和巴氏灭菌以及添加强化剂后的营养状况和抗氧化潜力。对30名母乳喂养妇女的成熟早产儿乳汁进行了储存过程的影响评估。对成熟早产儿乳进行热处理和添加强化剂后的总蛋白、脂质和乳糖进行测定。采用铁还原抗氧化电位法和脂质过氧化抑制法测定其抗氧化能力。冷冻和巴氏灭菌后蛋白质浓度降低(p<0.05)。巴氏灭菌进一步降低了冷冻后的脂质浓度。热处理后铁还原抗氧化能力降低(p<0.05)。在成熟乳中添加强化剂可提高蛋白质、脂质和乳糖的浓度。我们的研究结果表明,储存和巴氏灭菌过程会影响早产儿母乳的基本营养成分和抗氧化能力。为了确保早产儿有足够的营养,早产儿母乳,补充,特别是高浓度的蛋白质和脂质,是必要的,在热处理后。
{"title":"Effect of storage process on nutritive properties of preterm human milk","authors":"N. Lugonja, V. Marinković, B. Miličić, J. Avdalović, M. Vrvić, S. Spasić","doi":"10.2298/ciceq220117021l","DOIUrl":"https://doi.org/10.2298/ciceq220117021l","url":null,"abstract":"Freeze storage and pasteurization of human milk are common treatments in milk banks. Thermal treatment changes the quality of milk for preterm infants? nutrition, and the aim of this paper was to examine the nutritional profile and antioxidant potential of preterm human milk after storage and pasteurization, and also after supplementation with fortifier. The effects of storage processes were estimated on mature preterm milk of 30 breastfeeding women. Total proteins, lipids and lactose were determined after thermal processing and supplementation of mature preterm milk with fortifier. The antioxidant capacity was determined using the ferric reducing antioxidant potential method and lipid peroxidation inhibition assay. Protein concentration decreased after frozen storage and pasteurization (p<0.05). Pasteurization further reduced the lipid concentration after freezing. The ferric reducing antioxidant potential decreased after thermal treatments (p<0.05). Supplementation of mature milk with fortifier increased the concentration of proteins, lipids and lactose. Our findings demonstrated that storage and pasteurization processes affect the basic nutritional composition and antioxidant capacity of preterm human milk. In order to ensure adequate nutrition for preterm infants with preterm human milk, supplementation, especially with high concentrations of proteins and lipids, is necessary after thermal treatments.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Chemical Industry & Chemical Engineering Quarterly
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1