Pub Date : 2021-11-10DOI: 10.30492/IJCCE.2021.128447.4158
M. Abdolmajidi, Ali Hasani Jooshaghani, A. Cheraghi, A. Haghtalab
Catching acidic gases, for example, CO2 and H2S from gaseous petrol by alkanolamines are regular in gas cleansing frameworks. In this study, for the first time we use an additional Gibbs argillic model (N_Wilson_NRF) for thermodynamic demonstration of CO2 dissolvability in the double part CO2+MDEA and three part MDEA+H2O+CO2 frameworks. The supposition an altogether atomic framework with no occurrence compound responses and immersed gas stage from the CO2 gas were explored for the point of having a convenient modelling. To decide the dissolvability of CO2 the action coefficient strategy (γ_φ Approach) and the N-Wilson-NRF model were utilized. The result was 1.38 from experimental emerge attain in the two-component water- CO2 modelling. For the three-parts, water-CO2-MDEA framework with the measure of 6.912, the improvement was created.
例如，在气体净化框架中，烷醇胺捕获气态汽油中的二氧化碳和H2S是常规的。在这项研究中，我们首次使用了一个额外的Gibbs弹性模型(N_Wilson_NRF)来证明CO2在双组分CO2+MDEA和三组分MDEA+H2O+CO2框架中的可溶性。为了便于建模，探讨了不发生复合反应的全原子框架和CO2气体浸没气级的假设。采用作用系数策略(γ_φ法)和N-Wilson-NRF模型确定CO2的可溶性。双组分水- CO2模型的实验结果为1.38。对测度为6.912的水- co2 - mdea框架进行了改进。
{"title":"Thermodynamic Modeling the Solubility of CO2 in the Binary and Three-Component Aqua System of Methyldiethanolamine (MDEA) Using the N-Wilson-NRF","authors":"M. Abdolmajidi, Ali Hasani Jooshaghani, A. Cheraghi, A. Haghtalab","doi":"10.30492/IJCCE.2021.128447.4158","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.128447.4158","url":null,"abstract":"Catching acidic gases, for example, CO2 and H2S from gaseous petrol by alkanolamines are regular in gas cleansing frameworks. In this study, for the first time we use an additional Gibbs argillic model (N_Wilson_NRF) for thermodynamic demonstration of CO2 dissolvability in the double part CO2+MDEA and three part MDEA+H2O+CO2 frameworks. The supposition an altogether atomic framework with no occurrence compound responses and immersed gas stage from the CO2 gas were explored for the point of having a convenient modelling. To decide the dissolvability of CO2 the action coefficient strategy (γ_φ Approach) and the N-Wilson-NRF model were utilized. The result was 1.38 from experimental emerge attain in the two-component water- CO2 modelling. For the three-parts, water-CO2-MDEA framework with the measure of 6.912, the improvement was created.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72661762","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}
Pub Date : 2021-11-09DOI: 10.30492/IJCCE.2021.531402.4771
M. Sarmadi, Amirhossien Hasan Ahi, N. Esmaile, Mohammad Reza Gohari Darabkhani
In boilers and hot water heating systems, hydrazine is used as one of the powerful reducing agents for eliminating oxygen. Due to the toxicity and carcinogenicity of this material, a suitable replacement named diethylhydroxylamine (DEHA) can be used. DEHA has low acute toxicity and animal tests do not show mutagenic activity. In this study, hydrazine and DEHA as deoxygenation materials were used in boilers of Tarasht power plant in Iran (Tehran). In different months (May to November), deoxygenation was examined by these two substances. The oxygen removal value of DEHA was equal to hydrazine and sometimes far better than it. The rate of deoxygenation reaction of DEHA was 40 ppb in most months of the year, but the number of peaks in hydrazine was greater (2 peaks with 50 ppb and 1 peak with 60 ppb). Hydrazine analysis is time-consuming, as well as pollutes the environment. On the other hand, DEHA of tests were completed sooner. Also, DEHA as an economical material with low toxicity can be a good alternative to hydrazine in boilers. This material can prevent boiler corrosion by oxygen removal.
{"title":"The high performance of diethylhydroxylamine in comparison with hydrazine for the removal of dissolved oxygen from boilers of power plant","authors":"M. Sarmadi, Amirhossien Hasan Ahi, N. Esmaile, Mohammad Reza Gohari Darabkhani","doi":"10.30492/IJCCE.2021.531402.4771","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.531402.4771","url":null,"abstract":"In boilers and hot water heating systems, hydrazine is used as one of the powerful reducing agents for eliminating oxygen. Due to the toxicity and carcinogenicity of this material, a suitable replacement named diethylhydroxylamine (DEHA) can be used. DEHA has low acute toxicity and animal tests do not show mutagenic activity. In this study, hydrazine and DEHA as deoxygenation materials were used in boilers of Tarasht power plant in Iran (Tehran). In different months (May to November), deoxygenation was examined by these two substances. The oxygen removal value of DEHA was equal to hydrazine and sometimes far better than it. The rate of deoxygenation reaction of DEHA was 40 ppb in most months of the year, but the number of peaks in hydrazine was greater (2 peaks with 50 ppb and 1 peak with 60 ppb). Hydrazine analysis is time-consuming, as well as pollutes the environment. On the other hand, DEHA of tests were completed sooner. Also, DEHA as an economical material with low toxicity can be a good alternative to hydrazine in boilers. This material can prevent boiler corrosion by oxygen removal.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76989552","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}
Pub Date : 2021-11-09DOI: 10.30492/IJCCE.2021.131277.4241
M. Randjelović, Jelena Čović, Ivana Jovanović, A. Zarubica, A. Bojić
In this research, xonotlite was synthesized by a hydrothermal method in the Si-Ca-Na-H2O system. Detailed structural characterization by using XRD technique revealed that obtained material contains a small quantity of wollastonite (up to 3 %) as impurity. Calcination of the obtained sample at 900 ˚C has resulted in complete transformation of xonotlite to wollastonite which was detected as only crystal phase. Crystallite size and lattice strain of all crystal phases were calculated using Scherrer and Williamson-Hall method. SEM observation of xonotlite morphology revealed tiny needle-like crystals joined together forming dendritic or globular aggregates. Optimal conditions for electrophoretic deposition of xonotlite on 304 type stainless steel have been achieved by appropriate selection of electric field strengths, dispersing medium and dispersants. Stable suspension of material was obtained using isopropanol containing 1 % water as dispersing medium and Ca-nitrate as charging additive. Native layers of xonotlite have a very smooth morphology, while after calcination, the appearance of small cracks in the coating can be observed but the adhesion strength of the coatings to the substrate is improved.
{"title":"Morpho-structural characterization and electrophoretic deposition of xonotlite obtained by a hydrothermal method","authors":"M. Randjelović, Jelena Čović, Ivana Jovanović, A. Zarubica, A. Bojić","doi":"10.30492/IJCCE.2021.131277.4241","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.131277.4241","url":null,"abstract":"In this research, xonotlite was synthesized by a hydrothermal method in the Si-Ca-Na-H2O system. Detailed structural characterization by using XRD technique revealed that obtained material contains a small quantity of wollastonite (up to 3 %) as impurity. Calcination of the obtained sample at 900 ˚C has resulted in complete transformation of xonotlite to wollastonite which was detected as only crystal phase. Crystallite size and lattice strain of all crystal phases were calculated using Scherrer and Williamson-Hall method. SEM observation of xonotlite morphology revealed tiny needle-like crystals joined together forming dendritic or globular aggregates. Optimal conditions for electrophoretic deposition of xonotlite on 304 type stainless steel have been achieved by appropriate selection of electric field strengths, dispersing medium and dispersants. Stable suspension of material was obtained using isopropanol containing 1 % water as dispersing medium and Ca-nitrate as charging additive. Native layers of xonotlite have a very smooth morphology, while after calcination, the appearance of small cracks in the coating can be observed but the adhesion strength of the coatings to the substrate is improved.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"92 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84663604","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}
Pub Date : 2021-11-09DOI: 10.30492/IJCCE.2021.535756.4876
M. Bayareh, B. Ghasemi, Mohsen Nazemi Ashani
In this paper, two-dimensional simulations are performed to separate polystyrene (PS) and polymethyl methacrylate (PMMA) particles suspended in water using an acoustic field. The acoustic waves are generated by two aluminum interdigitated transducers (IDTs) over a piezoelectric substrate. The effect of input power, inlet flow rate, acoustic frequency, and distance between IDTs and channel on separation efficiency is evaluated by considering channel thickness. It is observed that the separation efficiency is enhanced by increasing acoustic frequency and input power. Also, as the inlet flow rate and distance between IDTs and channel decrease, the separation efficiency increases. The optimum values for input power, flow rate, frequency, and distance are 1.4 W, 0.2 ml/min, 5 MHz, and 75 µm, respectively, and a maximum separation of 88% is achieved.
{"title":"Acoustofluidic separation of microparticles: a numerical study","authors":"M. Bayareh, B. Ghasemi, Mohsen Nazemi Ashani","doi":"10.30492/IJCCE.2021.535756.4876","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.535756.4876","url":null,"abstract":"In this paper, two-dimensional simulations are performed to separate polystyrene (PS) and polymethyl methacrylate (PMMA) particles suspended in water using an acoustic field. The acoustic waves are generated by two aluminum interdigitated transducers (IDTs) over a piezoelectric substrate. The effect of input power, inlet flow rate, acoustic frequency, and distance between IDTs and channel on separation efficiency is evaluated by considering channel thickness. It is observed that the separation efficiency is enhanced by increasing acoustic frequency and input power. Also, as the inlet flow rate and distance between IDTs and channel decrease, the separation efficiency increases. The optimum values for input power, flow rate, frequency, and distance are 1.4 W, 0.2 ml/min, 5 MHz, and 75 µm, respectively, and a maximum separation of 88% is achieved.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"573 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78992634","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}
Pub Date : 2021-11-09DOI: 10.30492/IJCCE.2021.535474.4870
Mohammad Javad Bazregari, N. Norouzi, Mahdi Gholinejad, E. Khavasi, M. Fani
This study presents an energy-exergy analysis of a Humidification-Dehumidification (HD) solar water desalination system. The extensive application of the HD system lies in its low energy consumption and ability to exploit solar energy to supply all the heat energy demands. The unsteady governing equations were solved until the system reached a steady state. The simulations were done with the Euler approach to solving the system of energy balance equations numerically. This study's main goal was to investigate the effect of different configurations of the hybrid system and various operating conditions on the performance of the solar HD water desalination system. The optimum configuration was selected based on thermodynamic and exergy analyses. The effects of important parameters such as inlet water and air mass flow rate in the humidifier and dehumidifier water temperature and mass flow rate on the system's operation were studied. This paper also explored the feasibility of the extra heat as a domestic water heater under various conditions. Based on exergy analysis, it is shown that the solar desalination system with air-water preheater with the power of 1057.9 W had the most exergy destruction in comparison with the two other systems (i.e., water preheater system and air preheater system with the respective exergy destructions of 901.3 W and 75.3 W). Comparing the values of freshwater production, exergy destruction, and exergy efficiency, the solar system with a water preheater was selected as the optimum one.
{"title":"A 2E Analysis and Optimization of a Hybrid Solar Humidification-Dehumidification Water Desalination System and Solar Water Heater","authors":"Mohammad Javad Bazregari, N. Norouzi, Mahdi Gholinejad, E. Khavasi, M. Fani","doi":"10.30492/IJCCE.2021.535474.4870","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.535474.4870","url":null,"abstract":"This study presents an energy-exergy analysis of a Humidification-Dehumidification (HD) solar water desalination system. The extensive application of the HD system lies in its low energy consumption and ability to exploit solar energy to supply all the heat energy demands. The unsteady governing equations were solved until the system reached a steady state. The simulations were done with the Euler approach to solving the system of energy balance equations numerically. This study's main goal was to investigate the effect of different configurations of the hybrid system and various operating conditions on the performance of the solar HD water desalination system. The optimum configuration was selected based on thermodynamic and exergy analyses. The effects of important parameters such as inlet water and air mass flow rate in the humidifier and dehumidifier water temperature and mass flow rate on the system's operation were studied. This paper also explored the feasibility of the extra heat as a domestic water heater under various conditions. Based on exergy analysis, it is shown that the solar desalination system with air-water preheater with the power of 1057.9 W had the most exergy destruction in comparison with the two other systems (i.e., water preheater system and air preheater system with the respective exergy destructions of 901.3 W and 75.3 W). Comparing the values of freshwater production, exergy destruction, and exergy efficiency, the solar system with a water preheater was selected as the optimum one.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"89 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85870211","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}
Pub Date : 2021-11-03DOI: 10.30492/IJCCE.2021.534762.4856
N. Saikumari
Several extensive research studies have explored the advantages of green templates in the synthesis of structure and morphology-controlled photocatalytic nano materials. This paper compares the potential aspect of zingiber rhizome extract (ZE) and tapioca starch extract (TS) in modifying the surface and optical properties of titania nano particles (TNP) synthesized by sol-gel technique. The synthesized nano catalysts were characterized using various physico-chemical techniques. While zingiber extract promote effectively favored the formation of dual anatase and rutile phases, tapioca extract ended with single anatase phase titania, were examined for the degradation of Congo red in the presence of sunlight. The photo mineralization and recyclability of catalysts have been evaluated through Total Organic Content analysis. The easy recovery and reusability of bio synthesized nano catalysts with good control over the grain size, enable them to be an implicit novel green templates in the successful synthesis of photoactive mesoporous nano titania.
{"title":"COMPARATIVE STUDY ON STRUCTURING AND PHOTOCATALYTIC ACTIVITY OF NANOTITANIA EMBOSSED WITH ORGANIC EXTRACTS","authors":"N. Saikumari","doi":"10.30492/IJCCE.2021.534762.4856","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.534762.4856","url":null,"abstract":"Several extensive research studies have explored the advantages of green templates in the synthesis of structure and morphology-controlled photocatalytic nano materials. This paper compares the potential aspect of zingiber rhizome extract (ZE) and tapioca starch extract (TS) in modifying the surface and optical properties of titania nano particles (TNP) synthesized by sol-gel technique. The synthesized nano catalysts were characterized using various physico-chemical techniques. While zingiber extract promote effectively favored the formation of dual anatase and rutile phases, tapioca extract ended with single anatase phase titania, were examined for the degradation of Congo red in the presence of sunlight. The photo mineralization and recyclability of catalysts have been evaluated through Total Organic Content analysis. The easy recovery and reusability of bio synthesized nano catalysts with good control over the grain size, enable them to be an implicit novel green templates in the successful synthesis of photoactive mesoporous nano titania.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"17 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81190519","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}
Pub Date : 2021-11-03DOI: 10.30492/IJCCE.2021.533974.4830
H. Liu, Xiaoxia Li, Yangyang Li, Min Wang, Fanjun Meng, Jinling Huang, Rui Yu, Yang Wang
Hydrogels have excellent biocompatibility and are widely used in biomedical applications. However, it is still a challenge to build a hydrogel with outstanding mechanical properties and multiple functions. In this study, a polyacrylamide (PAM) hydrogel with a uniform network structure was achieved through an ultraviolet (UV)-responsive organic crosslinking agent, and a higher mechanical strength PAM-Ag+ hydrogel was designed through the introduction of silver ion by metal coordination interaction. Various contents of N'N-bis(acryloyl)cysteamine (BACA) as cross-linker, acrylamide (AM) as monomer, and Irgacure 2959 as initiator were investigated to have an optimal combination of high strength. Thus, the PAM-Ag+ hydrogel exhibited excellent adhesive behavior that could be fixed to the human forearm and any part of the skin, such as the finger and elbow joint. In addition, the properties and biocompatibility evaluations of the tough hydrogel in medical wound dressing were investigated. Meanwhile, these results showed that PAM-Ag+ hydrogels possess high stretchable (2600%) and mechanical robust (2.55 MPa) properties. Excitingly, the release of colchicine (Col) more than 95% in 48 h demonstrated the hydrogel highly potential in medical dressing and drug release applications in virtue of the excellent moisture retention, permeability, water tightness, swelling ratio, and biocompatibility.
水凝胶具有良好的生物相容性，在生物医学领域有着广泛的应用。然而，如何构建一种具有优异力学性能和多种功能的水凝胶仍然是一个挑战。本研究通过紫外(UV)响应有机交联剂获得了具有均匀网络结构的聚丙烯酰胺(PAM)水凝胶，并通过金属配位作用引入银离子设计了机械强度更高的PAM- ag +水凝胶。以不同含量的N′N-双(丙烯酰)半胱胺(BACA)为交联剂，丙烯酰胺(AM)为单体，Irgacure 2959为引发剂，以获得最佳的高强度组合。因此，PAM-Ag+水凝胶表现出优异的粘附性能，可以固定在人体前臂和任何部位的皮肤上，如手指和肘关节。此外，还对医用伤口敷料中韧性水凝胶的性能和生物相容性进行了研究。同时，PAM-Ag+水凝胶具有较高的拉伸性能(2600%)和力学强度(2.55 MPa)。令人兴奋的是，在48 h内秋水仙碱(Col)的释放量超过95%，表明水凝胶具有良好的保湿性、透气性、水密性、溶胀率和生物相容性，在医用敷料和药物释放应用中具有很大的潜力。
{"title":"Preparation, in-vitro evaluation, and delivery of colchicine via polyacrylamide hydrogel","authors":"H. Liu, Xiaoxia Li, Yangyang Li, Min Wang, Fanjun Meng, Jinling Huang, Rui Yu, Yang Wang","doi":"10.30492/IJCCE.2021.533974.4830","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.533974.4830","url":null,"abstract":"Hydrogels have excellent biocompatibility and are widely used in biomedical applications. However, it is still a challenge to build a hydrogel with outstanding mechanical properties and multiple functions. In this study, a polyacrylamide (PAM) hydrogel with a uniform network structure was achieved through an ultraviolet (UV)-responsive organic crosslinking agent, and a higher mechanical strength PAM-Ag+ hydrogel was designed through the introduction of silver ion by metal coordination interaction. Various contents of N'N-bis(acryloyl)cysteamine (BACA) as cross-linker, acrylamide (AM) as monomer, and Irgacure 2959 as initiator were investigated to have an optimal combination of high strength. Thus, the PAM-Ag+ hydrogel exhibited excellent adhesive behavior that could be fixed to the human forearm and any part of the skin, such as the finger and elbow joint. In addition, the properties and biocompatibility evaluations of the tough hydrogel in medical wound dressing were investigated. Meanwhile, these results showed that PAM-Ag+ hydrogels possess high stretchable (2600%) and mechanical robust (2.55 MPa) properties. Excitingly, the release of colchicine (Col) more than 95% in 48 h demonstrated the hydrogel highly potential in medical dressing and drug release applications in virtue of the excellent moisture retention, permeability, water tightness, swelling ratio, and biocompatibility.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"10 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78585922","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}
Pub Date : 2021-11-03DOI: 10.30492/IJCCE.2021.109173.3622
Leila Baharinikoo, M. Chaichi, M. Ganjali
Acrylamide is one of the potential environmental public health problems, resulting from its increased accumulation in the process of cooking foods content high level of carbohydrates that are fried or cooked at high temperatures. So, developing a precise and sensitive analytical method for detecting and determining acrylamide in foods is absolutely necessary and inevitable. Gas chromatography (GC) and liquid chromatography (LC) are two main laboratory techniques for acrylamide determination. In this study, we tried to use a cheaper, faster, accurately method for measuring acrylamide in real food samples. P540 and P503 were used as fluorescent reagent to detect the concentration of acrylamide in potato chips samples from 4 companies. Fluorescence spectroscopy was used in this work. The results obtained for the detection of acrylamide in comparison with the HPLC-MS method showed that there is an acceptable overlap between the fluorescence spectroscopy and HPLC method. The amount of acrylamide in four potato chips samples, obtained from the market in Tehran city, was determined using the proposed method. The optimum values of different parameters, were determined. Comparison between two methods, HPLC-MS and fluorescence spectroscopy were also described. The figures of merit for the proposed method were at the ideal range. The developed methods showed a high correlation coefficient (R2= 0.991). According to the results of the fluorescence emission spectroscopy and its comparison with HPLC-MS, performance and reliability of proposed method as a simple, efficient and rapid method with reduction of cost and time for determining acrylamide in potato chip samples were demonstrated.
{"title":"Fluorescence determination of acrylamide in potato chips based on P540 and P503 fluorescent reagents","authors":"Leila Baharinikoo, M. Chaichi, M. Ganjali","doi":"10.30492/IJCCE.2021.109173.3622","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.109173.3622","url":null,"abstract":"Acrylamide is one of the potential environmental public health problems, resulting from its increased accumulation in the process of cooking foods content high level of carbohydrates that are fried or cooked at high temperatures. So, developing a precise and sensitive analytical method for detecting and determining acrylamide in foods is absolutely necessary and inevitable. Gas chromatography (GC) and liquid chromatography (LC) are two main laboratory techniques for acrylamide determination. In this study, we tried to use a cheaper, faster, accurately method for measuring acrylamide in real food samples. P540 and P503 were used as fluorescent reagent to detect the concentration of acrylamide in potato chips samples from 4 companies. Fluorescence spectroscopy was used in this work. The results obtained for the detection of acrylamide in comparison with the HPLC-MS method showed that there is an acceptable overlap between the fluorescence spectroscopy and HPLC method. The amount of acrylamide in four potato chips samples, obtained from the market in Tehran city, was determined using the proposed method. The optimum values of different parameters, were determined. Comparison between two methods, HPLC-MS and fluorescence spectroscopy were also described. The figures of merit for the proposed method were at the ideal range. The developed methods showed a high correlation coefficient (R2= 0.991). According to the results of the fluorescence emission spectroscopy and its comparison with HPLC-MS, performance and reliability of proposed method as a simple, efficient and rapid method with reduction of cost and time for determining acrylamide in potato chip samples were demonstrated.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"67 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76085625","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}
Pub Date : 2021-11-03DOI: 10.30492/IJCCE.2021.527548.4663
N. Norouzi, Ghassem Valizadeh, Mohammad Hossein Hemmati, Zahra Jafarabadi, M. Fani
In the last one hundred years, the increase in the use of fossil fuels in various industries, including refineries, petrochemicals, industrial complexes, etc., to achieve more production, has led to an increase in various pollutants in the world and environmental concerns, various economic costs, and health costs. Imposed on human beings. One of the most important sources of environmental pollution is industrial fluoride gases. According to global statistics, Iran is known as the third country to burn these gases. Reducing the emissions of these gases is one of the great goals of the international community. It seems necessary to study various methods such as converting gas to liquid to recover Flare gas. This research has simulated a gas-to-liquid conversion unit using the Flare gas output data of the south pars natural gas processing plant in Aspen Hysys V11 software. This unit is then evaluated and optimized by the exergy analysis method. The simulation output shows that when Flare gas is used to liquid the unit’s raw material, 1549 barrels of gas to liquid products per day will be obtained from this unit. Investigation of this case shows that one of the appropriate solutions to recover Flare gas can be to create a gas to the liquid conversion unit with energy and exergy efficiency of 65% and 69%.
{"title":"Simulation and exergy and exergoeconomic analysis of an associated gas GTL recovery plant (Case study: 4 and 5 phases of South Pars)","authors":"N. Norouzi, Ghassem Valizadeh, Mohammad Hossein Hemmati, Zahra Jafarabadi, M. Fani","doi":"10.30492/IJCCE.2021.527548.4663","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.527548.4663","url":null,"abstract":"In the last one hundred years, the increase in the use of fossil fuels in various industries, including refineries, petrochemicals, industrial complexes, etc., to achieve more production, has led to an increase in various pollutants in the world and environmental concerns, various economic costs, and health costs. Imposed on human beings. One of the most important sources of environmental pollution is industrial fluoride gases. According to global statistics, Iran is known as the third country to burn these gases. Reducing the emissions of these gases is one of the great goals of the international community. It seems necessary to study various methods such as converting gas to liquid to recover Flare gas. This research has simulated a gas-to-liquid conversion unit using the Flare gas output data of the south pars natural gas processing plant in Aspen Hysys V11 software. This unit is then evaluated and optimized by the exergy analysis method. The simulation output shows that when Flare gas is used to liquid the unit’s raw material, 1549 barrels of gas to liquid products per day will be obtained from this unit. Investigation of this case shows that one of the appropriate solutions to recover Flare gas can be to create a gas to the liquid conversion unit with energy and exergy efficiency of 65% and 69%.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"6 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89375796","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}
Pub Date : 2021-11-03DOI: 10.30492/IJCCE.2021.139680.4423
M. Sarmadi, P. Nassiri, F. Razavian, B. Khoshmanesh
Noise pollution is one of the challenges of installing equipment and developing industries. The control of noise generated by small power plants is a necessity for its use development. Designing the synthesis of copper and nickel alloy foam and using this foam to reduce noise pollution in the exhaust is one of the effective methods to control and reduce noise pollution from power plants. The purpose of this study was to synthesize copper and nickel alloy foam and compare the effect of results of spl changes in software ANSYS for three ductless, ideal wall and multilayer wall modes at different frequencies. In this regard, the adjunct duct is modeled as 3D by software ANSYS, and the output sound intensity of the duct in the acoustic setting is analyzed in several different modes. The results show that three different modes in the exhaust output indicate that the multilayer wall at most frequencies reduces the sound pressure level relative to the ductless or ideal wall modes.
{"title":"Reduction in Noise Pollution of a Gas Power Plant under Construction Using Synthesis of Copper and Nickel Alloy Foam in a Simulated Setting","authors":"M. Sarmadi, P. Nassiri, F. Razavian, B. Khoshmanesh","doi":"10.30492/IJCCE.2021.139680.4423","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.139680.4423","url":null,"abstract":"Noise pollution is one of the challenges of installing equipment and developing industries. The control of noise generated by small power plants is a necessity for its use development. Designing the synthesis of copper and nickel alloy foam and using this foam to reduce noise pollution in the exhaust is one of the effective methods to control and reduce noise pollution from power plants. The purpose of this study was to synthesize copper and nickel alloy foam and compare the effect of results of spl changes in software ANSYS for three ductless, ideal wall and multilayer wall modes at different frequencies. In this regard, the adjunct duct is modeled as 3D by software ANSYS, and the output sound intensity of the duct in the acoustic setting is analyzed in several different modes. The results show that three different modes in the exhaust output indicate that the multilayer wall at most frequencies reduces the sound pressure level relative to the ductless or ideal wall modes.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"33 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84402850","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}
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