Chemical Engineering Science最新文献_第7页

Gamma radiation induced optimized synthesis of amine functionalised poly-glycidyl methacrylate grafted poly-propylene non-woven fabric and its adsorption behaviour towards aqueous Pb(II) 伽马辐射诱导的胺功能化聚缩水甘油酯接枝聚丙烯无纺布的优化合成及其对含水铅(II)的吸附行为

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-06 DOI: 10.1016/j.ces.2024.120886

Amit Kanjilal , Krishan Kant Singh , Awadhesh Kumar

Comprehensive optimization of the functionalization of polypropylene (PP) non-woven fabric through gamma irradiation-induced graft polymerization of glycidyl methacrylate (GMA), results in a material having high grafting yield. The technique, utilizing a mutual irradiation method, produced poly-GMA (PGMA) grafted PP fabric with a remarkable grafting yield of 125 % in a 1:1 acetone–water mixture, subjected to 25 kGy of total dose at a dose rate of 5 kGyh⁻¹. The enhancement of the amination process utilizing PGMA-grafted PP was investigated with polyamines. Under the optimized conditions, the diethylene triamine (DETA) functionalized variant was identified as an effective adsorbent for aqueous Pb²⁺ ions. The optimized adsorbent exhibited a high saturation capacity of approximately 230 mgg⁻¹ for Pb²⁺ ions, demonstrating rapid kinetics at near-neutral pH and 25 °C. This low cost innovative material holds significant promise for effective lead removal from drinking water and industrial wastewater, offering a sustainable economical solution for environmental remediation.

通过伽马辐照诱导甲基丙烯酸缩水甘油酯（GMA）接枝聚合，对聚丙烯（PP）无纺布的功能化进行了全面优化，从而获得了一种具有高接枝率的材料。在 1:1 丙酮-水混合物中，以 5 kGyh-1 的剂量率、25 kGy 的总剂量，利用相互辐照法生产出了聚-甲基丙烯酸缩水甘油酯（PGMA）接枝聚丙烯织物，接枝率高达 125%。利用多胺对利用 PGMA 接枝 PP 的胺化过程进行了研究。在优化条件下，二亚乙基三胺（DETA）功能化变体被确定为水性 Pb2+ 离子的有效吸附剂。优化后的吸附剂对 Pb2+ 离子的饱和容量约为 230 mgg-1，在接近中性 pH 值和 25 °C 的条件下表现出快速的动力学特性。这种低成本的创新材料有望有效去除饮用水和工业废水中的铅，为环境修复提供可持续的经济解决方案。

{"title":"Gamma radiation induced optimized synthesis of amine functionalised poly-glycidyl methacrylate grafted poly-propylene non-woven fabric and its adsorption behaviour towards aqueous Pb(II)","authors":"Amit Kanjilal , Krishan Kant Singh , Awadhesh Kumar","doi":"10.1016/j.ces.2024.120886","DOIUrl":"10.1016/j.ces.2024.120886","url":null,"abstract":"<div><div>Comprehensive optimization of the functionalization of polypropylene (PP) non-woven fabric through gamma irradiation-induced graft polymerization of glycidyl methacrylate (GMA), results in a material having high grafting yield. The technique, utilizing a mutual irradiation method, produced poly-GMA (PGMA) grafted PP fabric with a remarkable grafting yield of 125 % in a 1:1 acetone–water mixture, subjected to 25 kGy of total dose at a dose rate of 5 kGyh<sup>−1</sup>. The enhancement of the amination process utilizing PGMA-grafted PP was investigated with polyamines. Under the optimized conditions, the diethylene triamine (DETA) functionalized variant was identified as an effective adsorbent for aqueous Pb<sup>2+</sup> ions. The optimized adsorbent exhibited a high saturation capacity of approximately 230 mgg<sup>−1</sup> for Pb<sup>2+</sup> ions, demonstrating rapid kinetics at near-neutral pH and 25 °C. This low cost innovative material holds significant promise for effective lead removal from drinking water and industrial wastewater, offering a sustainable economical solution for environmental remediation.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"302 ","pages":"Article 120886"},"PeriodicalIF":4.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 evolution of a droplet impacting a nonuniform chemically patterned fuel cell surface 液滴撞击非均匀化学图案燃料电池表面的能量演化

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-05 DOI: 10.1016/j.ces.2024.120887

Xiang Song, Haonan Peng, Jianmin Zhang, Xiaolong He

A three-dimensional nonorthogonal lattice Boltzmann model is employed to simulate a single droplet impacting a nonuniform wettable surface at the bottom of a proton exchange membrane fuel cell. The effects of nonuniform surface wettability differences in the flow channel, the impact Weber number, and the central stripe width on the energy evolution during the spreading stage are investigated. Qualitative and quantitative comparisons between the numerical simulations and experimental results indicate that the main energy loss during the initial spreading stage is attributable to momentum redistribution, while viscous dissipation is caused by shear stress and vorticity in the rim. A larger wettability difference leads to a higher net unbalanced Young’s force, resulting in stronger shear and viscous dissipation near the wettability contrast line. For smaller Weber numbers, in the early impact stage, the main loss of kinetic energy is caused by the redistribution of momentum; in the later spreading stage, the increase in surface energy is the main sink of kinetic energy. The unbalanced Young’s force hinders the spreading of the droplet at larger stripe widths, leading to a larger vortex intensity within the rim.

采用三维非正交晶格玻尔兹曼模型模拟了单个液滴撞击质子交换膜燃料电池底部非均匀可润湿表面的情况。研究了流道中的非均匀表面润湿性差异、冲击韦伯数和中心条纹宽度对扩散阶段能量演化的影响。数值模拟与实验结果之间的定性和定量比较表明，初始铺展阶段的主要能量损失可归因于动量再分布，而粘性耗散则是由边缘的剪应力和涡流造成的。较大的润湿性差异会导致较高的净不平衡杨氏力，从而在润湿性对比线附近产生较强的剪切力和粘性耗散。对于较小的韦伯数字，在早期冲击阶段，动能的主要损失是由动量的重新分配造成的；而在后期的扩散阶段，表面能的增加是动能的主要汇集。在条纹宽度较大时，不平衡的杨氏力会阻碍液滴的扩散，从而导致边缘内的涡旋强度增大。

{"title":"Energy evolution of a droplet impacting a nonuniform chemically patterned fuel cell surface","authors":"Xiang Song, Haonan Peng, Jianmin Zhang, Xiaolong He","doi":"10.1016/j.ces.2024.120887","DOIUrl":"10.1016/j.ces.2024.120887","url":null,"abstract":"<div><div>A three-dimensional nonorthogonal lattice Boltzmann model is employed to simulate a single droplet impacting a nonuniform wettable surface at the bottom of a proton exchange membrane fuel cell. The effects of nonuniform surface wettability differences in the flow channel, the impact Weber number, and the central stripe width on the energy evolution during the spreading stage are investigated. Qualitative and quantitative comparisons between the numerical simulations and experimental results indicate that the main energy loss during the initial spreading stage is attributable to momentum redistribution, while viscous dissipation is caused by shear stress and vorticity in the rim. A larger wettability difference leads to a higher net unbalanced Young’s force, resulting in stronger shear and viscous dissipation near the wettability contrast line. For smaller Weber numbers, in the early impact stage, the main loss of kinetic energy is caused by the redistribution of momentum; in the later spreading stage, the increase in surface energy is the main sink of kinetic energy. The unbalanced Young’s force hinders the spreading of the droplet at larger stripe widths, leading to a larger vortex intensity within the rim.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"302 ","pages":"Article 120887"},"PeriodicalIF":4.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 heterogeneous continuous flow hydrogenation using FTIR inline analysis: a comparative study of multi-objective Bayesian optimization and kinetic modeling 利用傅立叶变换红外在线分析优化异质连续流加氢：多目标贝叶斯优化与动力学建模的比较研究

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-05 DOI: 10.1016/j.ces.2024.120901

Kejie Chai , Weida Xia , Runqiu Shen , Guihua Luo , Yingying Cheng , Weike Su , An Su

Heterogeneous continuous flow hydrogenation is important in the chemical industry, yet the simultaneous optimization of yield and productivity has historically been complex. This study introduces a heterogeneous continuous flow hydrogenation system specifically designed for preparing 2-amino-3-methylbenzoic acid (AMA), employing FTIR inline analysis coupled with an artificial neural network model for monitoring. We explored two distinct reaction optimization strategies: multi-objective Bayesian optimization (MOBO) and mechanism-based intrinsic kinetic modeling, executed in parallel to optimize reaction conditions. Remarkably, the MOBO approach achieved an optimal AMA yield (99%) and productivity (0.64 g/hour) within a limited number of iterations. In comparison, despite requiring extensive experimental data collection and equation fitting, the intrinsic kinetic modeling approach yielded a similar optimal result. Thus, while MOBO offers a more efficient route with fewer required experiments, kinetic modeling provides deeper insights into the optimization landscape but may be impacted by non-chemical kinetic phenomena and requires significant time and resources.

异相连续流氢化在化学工业中非常重要，但同时优化产量和生产率一直是个复杂的问题。本研究介绍了一种专为制备 2-氨基-3-甲基苯甲酸（AMA）而设计的异相连续流氢化系统，该系统采用傅立叶变换红外在线分析和人工神经网络模型进行监控。我们探索了两种不同的反应优化策略：多目标贝叶斯优化（MOBO）和基于机理的内在动力学建模，并行执行以优化反应条件。值得注意的是，MOBO 方法在有限的迭代次数内实现了最佳 AMA 产率（99%）和生产率（0.64 克/小时）。相比之下，尽管需要大量的实验数据收集和方程拟合，但内在动力学建模方法也获得了类似的最佳结果。因此，虽然 MOBO 提供了一条更有效的途径，所需的实验次数也更少，但动力学建模能更深入地了解优化情况，但可能会受到非化学动力学现象的影响，而且需要大量的时间和资源。

{"title":"Optimization of heterogeneous continuous flow hydrogenation using FTIR inline analysis: a comparative study of multi-objective Bayesian optimization and kinetic modeling","authors":"Kejie Chai , Weida Xia , Runqiu Shen , Guihua Luo , Yingying Cheng , Weike Su , An Su","doi":"10.1016/j.ces.2024.120901","DOIUrl":"10.1016/j.ces.2024.120901","url":null,"abstract":"<div><div>Heterogeneous continuous flow hydrogenation is important in the chemical industry, yet the simultaneous optimization of yield and productivity has historically been complex. This study introduces a heterogeneous continuous flow hydrogenation system specifically designed for preparing 2-amino-3-methylbenzoic acid (AMA), employing FTIR inline analysis coupled with an artificial neural network model for monitoring. We explored two distinct reaction optimization strategies: multi-objective Bayesian optimization (MOBO) and mechanism-based intrinsic kinetic modeling, executed in parallel to optimize reaction conditions. Remarkably, the MOBO approach achieved an optimal AMA yield (99%) and productivity (0.64 g/hour) within a limited number of iterations. In comparison, despite requiring extensive experimental data collection and equation fitting, the intrinsic kinetic modeling approach yielded a similar optimal result. Thus, while MOBO offers a more efficient route with fewer required experiments, kinetic modeling provides deeper insights into the optimization landscape but may be impacted by non-chemical kinetic phenomena and requires significant time and resources.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"302 ","pages":"Article 120901"},"PeriodicalIF":4.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142588414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Impact of the K and Fe insertion methods in KFeCeZr catalysts on the CO2 hydrogenation to C2/C3 olefins at room pressure KFeCeZr 催化剂中的 K 和 Fe 插入方法对常压下 CO2 加氢制 C2/C3 烯烃的影响

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-05 DOI: 10.1016/j.ces.2024.120898

Ananda Vallezi Paladino Lino , Luiz Henrique Vieira , Elisabete Moreira Assaf , José Mansur Assaf

Light olefins, traditionally sourced from petroleum, are currently being investigated through alternative routes, such as CO₂ hydrogenation, aligning with CCUS policies. Alkali-promoted Fe-based catalysts have shown promise in coupling reverse water–gas shift and Fischer-Tropsch processes to produce light olefins from CO₂ directly. The in-situ generated Fe₅C₂ phase is commonly associated with the high activity of these catalysts. However, the preparation methods employed can lead to distinct catalyst properties, which considerably impact the performance during the reaction. Here, we investigate different strategies to introduce K and Fe in the KFeCeZr system and correlate catalyst properties with catalytic activity during CO₂ hydrogenation at ambient pressure. The catalyst prepared by one-pot precipitation of Fe, Ce, and Zr followed by K impregnation showed the most promising results in terms of conversion and productivity of light olefins. The effective incorporation of Fe in the CeZrO_x structure during synthesis was essential for maintaining the high dispersion of metallic Fe particles after reduction, improving reactant chemisorption. Under reaction conditions, this catalyst showed the most remarkable propensity to form iron carbides (Fe_xC_y), mainly composed of Fe₅C₂ phase. In general, this work highlights the impact that the construction steps of a multifunctional catalyst have on the physicochemical properties and, consequently, on the catalytic activity.

轻质烯烃传统上来自石油，目前正在通过二氧化碳加氢等替代途径进行研究，以符合 CCUS 政策。碱促进的铁基催化剂在耦合反向水-气变换和费托工艺以直接从二氧化碳生产轻烯烃方面显示出前景。原位生成的 Fe5C2 相通常与这些催化剂的高活性有关。然而，所采用的制备方法会导致催化剂性质的不同，从而对反应过程中的性能产生很大影响。在此，我们研究了在 KFeCeZr 体系中引入 K 和 Fe 的不同策略，并将催化剂特性与常压下 CO2 加氢反应的催化活性联系起来。在轻质烯烃的转化率和生产率方面，通过一次沉淀 Fe、Ce 和 Zr 并浸渍 K 制备的催化剂显示出最有前途的结果。在合成过程中将 Fe 有效地加入 CeZrOx 结构中对于还原后保持金属 Fe 颗粒的高度分散、改善反应物的化学吸附至关重要。在反应条件下，这种催化剂表现出最显著的形成碳化铁（FexCy）的倾向，主要由 Fe5C2 相组成。总之，这项工作强调了多功能催化剂的构建步骤对其物理化学特性的影响，以及由此对催化活性的影响。

{"title":"Impact of the K and Fe insertion methods in KFeCeZr catalysts on the CO2 hydrogenation to C2/C3 olefins at room pressure","authors":"Ananda Vallezi Paladino Lino , Luiz Henrique Vieira , Elisabete Moreira Assaf , José Mansur Assaf","doi":"10.1016/j.ces.2024.120898","DOIUrl":"10.1016/j.ces.2024.120898","url":null,"abstract":"<div><div>Light olefins, traditionally sourced from petroleum, are currently being investigated through alternative routes, such as CO<sub>2</sub> hydrogenation, aligning with CCUS policies. Alkali-promoted Fe-based catalysts have shown promise in coupling reverse water–gas shift and Fischer-Tropsch processes to produce light olefins from CO<sub>2</sub> directly. The <em>in-situ</em> generated Fe<sub>5</sub>C<sub>2</sub> phase is commonly associated with the high activity of these catalysts. However, the preparation methods employed can lead to distinct catalyst properties, which considerably impact the performance during the reaction. Here, we investigate different strategies to introduce K and Fe in the KFeCeZr system and correlate catalyst properties with catalytic activity during CO<sub>2</sub> hydrogenation at ambient pressure. The catalyst prepared by one-pot precipitation of Fe, Ce, and Zr followed by K impregnation showed the most promising results in terms of conversion and productivity of light olefins. The effective incorporation of Fe in the CeZrO<em><sub>x</sub></em> structure during synthesis was essential for maintaining the high dispersion of metallic Fe particles after reduction, improving reactant chemisorption. Under reaction conditions, this catalyst showed the most remarkable propensity to form iron carbides (Fe<em><sub>x</sub></em>C<em><sub>y</sub></em>), mainly composed of Fe<sub>5</sub>C<sub>2</sub> phase. In general, this work highlights the impact that the construction steps of a multifunctional catalyst have on the physicochemical properties and, consequently, on the catalytic activity.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"302 ","pages":"Article 120898"},"PeriodicalIF":4.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Cu2O/H2Ti3O7/Cellulose biohybrid film with efficient photocatalytic and antibacterial activities in solar-driven environmental decontamination 在太阳能驱动的环境净化中具有高效光催化和抗菌活性的 Cu2O/H2Ti3O7/Cellulose 生物杂化薄膜

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-05 DOI: 10.1016/j.ces.2024.120902

Mouheb Sboui , Mahmoud A. Hussein , Khalid A. Alamry , Youssef O. Al-Ghamdi , Huiyun Gan , Zhuoyu Ji , Meenakshisundaram Swaminathan , Kai Zhang , Zibiao Li , Zuofang Yao , Detlef W. Bahnemann , Jia Hong Pan

Increasing efforts have been devoted to cellulose-based multifunctional biomaterials for environmental applications. In this study, solvothermal method combined with impregnation reduction process of Cu²⁺ has been developed to create versatile Cu₂O/H₂Ti₃O₇/CP (cellulose paper) biocomposite films that demonstrates efficacy in treating wastewater from organic compounds, disinfecting it from microbes and also purifying the air from volatile organic compounds (VOCs). H₂Ti₃O₇ nanosheets decorated with Cu₂O nanoparticles exhibit an excellent visible-light responsibility. Furthermore, the Cu₂O/H₂Ti₃O₇/CP biocomposite film demonstrated enhanced efficacy in removing aniline in the liquid phase and 1-propanol in the gaseous phase compared to the H₂Ti₃O₇/CP. This enhanced photocatalytic activity is primarily due to the synergistic effect between Cu₂O and H₂Ti₃O₇, which suppresses the recombination of charge carriers and improves their mobility. Reuse tests confirm the stability of the prepared hybrid photocatalyst. Moreover, the biocomposite exhibits good antimicrobial properties, which contributed to the effective inactivation of Escherichia coli. This proves its versatility as a photocatalyst for a broad range of biological and environmental applications.

人们越来越致力于研究纤维素基多功能生物材料在环境方面的应用。本研究采用溶热法结合 Cu2+ 的浸渍还原工艺，制备出了多功能 Cu2O/H2Ti3O7/CP （纤维素纸）生物复合膜，该薄膜在处理废水中的有机化合物、消毒废水中的微生物以及净化空气中的挥发性有机化合物 (VOC) 方面具有显著功效。用 Cu2O 纳米颗粒装饰的 H2Ti3O7 纳米片材具有极佳的可见光责任。此外，与 H2Ti3O7/CP 相比，Cu2O/H2Ti3O7/CP 生物复合膜在去除液相中的苯胺和气相中的 1-丙醇方面表现出更强的功效。光催化活性的增强主要归功于 Cu2O 和 H2Ti3O7 之间的协同效应，它抑制了电荷载流子的重组并提高了其迁移率。重复使用测试证实了所制备的混合光催化剂的稳定性。此外，这种生物复合材料还具有良好的抗菌性能，能有效灭活大肠杆菌。这证明了它作为光催化剂的多功能性，可广泛应用于生物和环境领域。

{"title":"Cu2O/H2Ti3O7/Cellulose biohybrid film with efficient photocatalytic and antibacterial activities in solar-driven environmental decontamination","authors":"Mouheb Sboui , Mahmoud A. Hussein , Khalid A. Alamry , Youssef O. Al-Ghamdi , Huiyun Gan , Zhuoyu Ji , Meenakshisundaram Swaminathan , Kai Zhang , Zibiao Li , Zuofang Yao , Detlef W. Bahnemann , Jia Hong Pan","doi":"10.1016/j.ces.2024.120902","DOIUrl":"10.1016/j.ces.2024.120902","url":null,"abstract":"<div><div>Increasing efforts have been devoted to cellulose-based multifunctional biomaterials for environmental applications. In this study, solvothermal method combined with impregnation reduction process of Cu<sup>2+</sup> has been developed to create versatile Cu<sub>2</sub>O/H<sub>2</sub>Ti<sub>3</sub>O<sub>7</sub>/CP (cellulose paper) biocomposite films that demonstrates efficacy in treating wastewater from organic compounds, disinfecting it from microbes and also purifying the air from volatile organic compounds (VOCs). H<sub>2</sub>Ti<sub>3</sub>O<sub>7</sub> nanosheets decorated with Cu<sub>2</sub>O nanoparticles exhibit an excellent visible-light responsibility. Furthermore, the Cu<sub>2</sub>O/H<sub>2</sub>Ti<sub>3</sub>O<sub>7</sub>/CP biocomposite film demonstrated enhanced efficacy in removing aniline in the liquid phase and 1-propanol in the gaseous phase compared to the H<sub>2</sub>Ti<sub>3</sub>O<sub>7</sub>/CP. This enhanced photocatalytic activity is primarily due to the synergistic effect between Cu<sub>2</sub>O and H<sub>2</sub>Ti<sub>3</sub>O<sub>7</sub>, which suppresses the recombination of charge carriers and improves their mobility. Reuse tests confirm the stability of the prepared hybrid photocatalyst. Moreover, the biocomposite exhibits good antimicrobial properties, which contributed to the effective inactivation of <em>Escherichia coli</em>. This proves its versatility as a photocatalyst for a broad range of biological and environmental applications.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"302 ","pages":"Article 120902"},"PeriodicalIF":4.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Oxidation and degradation of nitrobenzene by ozone micro-nano bubbles 臭氧微纳气泡对硝基苯的氧化和降解作用

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-05 DOI: 10.1016/j.ces.2024.120903

Ruomeng Li , Mei Hong , Mingliang Guo , Ri Chen , Boyu Song

The remediation of ozone oxidation to nitrobenzene (NB) contaminated groundwater has limitations such as low ozone solubility and poor gas transmission capacity. In this paper, we combine the ozone oxidation and the micro-nano bubbles (MNBs) and investigate the oxidation of the degradation of NB using a semi-continuous experimental approach. The experimental results show that the degradation efficiency of NB by ozone MNBs system (98.69%) is significantly higher than that of traditional ozone oxidation. The presence of MNBs significantly increase the rate of ·OH, ·O₂^– and ¹O₂ production compared to large bubbles produced by ozone aeration. This is due to OH^– adsorbed at the interface will accelerate the conversion of ozone to ·OH during bubble rupture. And conversion between O₃,·OH, ·O₂^– and ¹O_2。 The degradation of NB in ozone MNBs could be described by quasi-first-order kinetics. The degradation kinetics of ozone MNBs are obviously affected by the initial concentration of NB, the initial pH of the reaction system, salinity, gas species and flow rate. Oxidative degradation products (p-benzoquinone, phenol, o-nitrophenol, p-nitrophenol, aniline, acetic acid, NO₃^–, etc.) have been identified by GC–MS, IC, UV–Vis. They show that the degradation results from the attack of the aromatic ring and –NO₂ of NB through nitrification, free radicals and O₃. This research introduces a novel approach for degrading NB and offers crucial insights into the degradation of organic substances using MNBs.

臭氧氧化法修复受硝基苯（NB）污染的地下水存在臭氧溶解度低、气体传输能力差等局限性。本文将臭氧氧化与微纳米气泡（MNBs）相结合，采用半连续实验方法研究了氧化降解 NB 的方法。实验结果表明，臭氧 MNBs 系统对 NB 的降解效率（98.69%）明显高于传统的臭氧氧化法。与臭氧曝气产生的大气泡相比，MNB 的存在大大提高了 -OH、-O2- 和 1O2 的产生速率。这是由于吸附在界面上的 OH- 会在气泡破裂时加速臭氧向 -OH 的转化。臭氧 MNB 中 NB 的降解可以用准一阶动力学来描述。臭氧 MNB 的降解动力学明显受到 NB 初始浓度、反应体系初始 pH 值、盐度、气体种类和流速的影响。通过 GC-MS、IC 和 UV-Vis 对氧化降解产物（对苯醌、苯酚、邻硝基苯酚、对硝基苯酚、苯胺、乙酸、NO3- 等）进行了鉴定。研究结果表明，降解是通过硝化、自由基和 O3 对 NB 的芳香环和 -NO2 进行攻击的结果。这项研究介绍了一种降解 NB 的新方法，并为利用 MNB 降解有机物提供了重要的启示。

{"title":"Oxidation and degradation of nitrobenzene by ozone micro-nano bubbles","authors":"Ruomeng Li , Mei Hong , Mingliang Guo , Ri Chen , Boyu Song","doi":"10.1016/j.ces.2024.120903","DOIUrl":"10.1016/j.ces.2024.120903","url":null,"abstract":"<div><div>The remediation of ozone oxidation to nitrobenzene (NB) contaminated groundwater has limitations such as low ozone solubility and poor gas transmission capacity. In this paper, we combine the ozone oxidation and the micro-nano bubbles (MNBs) and investigate the oxidation of the degradation of NB using a semi-continuous experimental approach. The experimental results show that the degradation efficiency of NB by ozone MNBs system (98.69%) is significantly higher than that of traditional ozone oxidation. The presence of MNBs significantly increase the rate of ·OH, ·O<sub>2</sub><sup>–</sup> and <sup>1</sup>O<sub>2</sub> production compared to large bubbles produced by ozone aeration. This is due to OH<sup>–</sup> adsorbed at the interface will accelerate the conversion of ozone to ·OH during bubble rupture. And conversion between O<sub>3</sub>,·OH, ·O<sub>2</sub><sup>–</sup> and <sup>1</sup>O<sub>2。</sub> The degradation of NB in ozone MNBs could be described by quasi-first-order kinetics. The degradation kinetics of ozone MNBs are obviously affected by the initial concentration of NB, the initial pH of the reaction system, salinity, gas species and flow rate. Oxidative degradation products (p-benzoquinone, phenol, o-nitrophenol, p-nitrophenol, aniline, acetic acid, NO<sub>3</sub><sup>–</sup>, etc.) have been identified by GC–MS, IC, UV–Vis. They show that the degradation results from the attack of the aromatic ring and –NO<sub>2</sub> of NB through nitrification, free radicals and O<sub>3</sub>. This research introduces a novel approach for degrading NB and offers crucial insights into the degradation of organic substances using MNBs.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"302 ","pages":"Article 120903"},"PeriodicalIF":4.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Modification of Cs/SiO2 with Zr element through sol–gel method for production of methyl methacrylate via one-step aldol condensation 通过溶胶-凝胶法用 Zr 元素改性 Cs/SiO2 以通过一步醛醇缩合法生产甲基丙烯酸甲酯

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-04 DOI: 10.1016/j.ces.2024.120899

Jinguo Hao , Junyang Liu , Senlin Deng , Lei Wang , Gang Wang , Chunshan Li

Development of effective cesium-based catalyst is important for methyl methacrylate (MMA) production via one-step aldol reaction. Herein, a kind of Cs/Zr-SiO₂ catalyst was prepared by sol–gel method and the acid-base properties and their balance could be controllably regulated. The influence of catalyst preparation conditions including Si/Zr ratio and water content on the structure and acid-base properties of Cs/Zr-SiO₂ was demonstrated, which consequentially affected catalytic performance. The formation of Si-O-Zr and Cs-O-Si structure was identified as the dominant Lewis acid and base sites and the acid site density can be enhanced by 1-fold when using sol–gel method. In addition, the MP conversion could reach 37 % with MMA selectivity of 85 % at the optimal condition. Kinetic studies revealed that the activation barrier on the modified 10Cs/Zr-SiO₂ exhibited the lowest activation energy of 110.9 kJ/mol. Besides, the initial catalytic activity could still maintain after 800 h recycling, with single-pass life of 160 h.

开发有效的铯基催化剂对于通过一步醛醇反应生产甲基丙烯酸甲酯（MMA）非常重要。本文采用溶胶-凝胶法制备了一种 Cs/Zr-SiO2 催化剂，并对其酸碱性质及其平衡进行了可控调节。结果表明，Si/Zr比和含水量等催化剂制备条件对Cs/Zr-SiO2的结构和酸碱性质有影响，进而影响催化性能。在溶胶-凝胶法中，Si-O-Zr 和 Cs-O-Si 结构的形成被确定为主要的路易斯酸和碱位点，酸位点密度可提高 1 倍。此外，在最佳条件下，MP 转化率可达 37%，MMA 选择性为 85%。动力学研究表明，改性 10Cs/Zr-SiO2 的活化能最低，为 110.9 kJ/mol。此外，在循环使用 800 小时后仍能保持初始催化活性，单次使用时间为 160 小时。

{"title":"Modification of Cs/SiO2 with Zr element through sol–gel method for production of methyl methacrylate via one-step aldol condensation","authors":"Jinguo Hao , Junyang Liu , Senlin Deng , Lei Wang , Gang Wang , Chunshan Li","doi":"10.1016/j.ces.2024.120899","DOIUrl":"10.1016/j.ces.2024.120899","url":null,"abstract":"<div><div>Development of effective cesium-based catalyst is important for methyl methacrylate (MMA) production <em>via</em> one-step aldol reaction. Herein, a kind of Cs/Zr-SiO<sub>2</sub> catalyst was prepared by sol–gel method and the acid-base properties and their balance could be controllably regulated. The influence of catalyst preparation conditions including Si/Zr ratio and water content on the structure and acid-base properties of Cs/Zr-SiO<sub>2</sub> was demonstrated, which consequentially affected catalytic performance. The formation of Si-O-Zr and Cs-O-Si structure was identified as the dominant Lewis acid and base sites and the acid site density can be enhanced by 1-fold when using sol–gel method. In addition, the MP conversion could reach 37 % with MMA selectivity of 85 % at the optimal condition. Kinetic studies revealed that the activation barrier on the modified 10Cs/Zr-SiO<sub>2</sub> exhibited the lowest activation energy of 110.9 kJ/mol. Besides, the initial catalytic activity could still maintain after 800 h recycling, with single-pass life of 160 h.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"302 ","pages":"Article 120899"},"PeriodicalIF":4.1,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 particle concentration during kneading on the particle dispersion state of carbon slurry 捏合过程中颗粒浓度对碳浆颗粒分散状态的影响

IF 4.7 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-04 DOI: 10.1016/j.ces.2024.120897

Kenta Kitamura, Takamasa Mori

Slurries are used across various industries, with particle dispersion control being crucial for optimizing product properties. The kneading process, involving high particle concentration kneading followed by dilution, is known to enhance particle dispersion in the production of electrodes and paint. However, not all industries that optimize product characteristics through particle dispersion control in slurries adopt the kneading process. This study analyzes the impact of kneading conditions on slurry properties, using carbon slurries as a case study to elucidate its true effects. Our findings revealed that as the particle concentration increased during kneading, particles exhibited behaviors such as “dispersed,” “aggregated,” “dispersed and then aggregated,” and “unchanged.” Traditionally, kneading has been viewed as a method to promote particle dispersion. However, this study highlights the need for a renewed understanding of kneading effects, challenging the conventional perception of its role in affecting particle dispersion.

泥浆用于各行各业，颗粒分散控制是优化产品性能的关键。众所周知，在电极和涂料生产中，揉捏工艺（包括高颗粒浓度揉捏，然后稀释）可提高颗粒的分散性。然而，并非所有通过控制泥浆中的颗粒分散来优化产品特性的行业都采用捏合工艺。本研究以碳泥浆为例，分析了捏合条件对泥浆特性的影响，以阐明其真实效果。我们的研究结果表明，在捏合过程中，随着颗粒浓度的增加，颗粒表现出 "分散"、"聚集"、"先分散后聚集 "和 "不变 "等行为。传统上，捏合被视为一种促进颗粒分散的方法。然而，这项研究强调了重新认识捏合效应的必要性，挑战了人们对捏合在影响颗粒分散方面作用的传统认识。

引用次数: 0

Strategies for enhancing the stability of WO3 photoanodes for water splitting: A review 提高用于水分离的 WO3 光阳极稳定性的策略：综述

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-03 DOI: 10.1016/j.ces.2024.120894

Huijing Yang , Songjie Li , Shuang Yu , Xiaomei Yu , Hui Zhao , Chengduo Wang , Dehai Ping , Jin You Zheng

Photoelectrochemical (PEC) water splitting is a promising green technology for converting solar energy into chemical energy, with great potential for clean energy production. However, developing stable photoanodes remains a significant challenge for large-scale application. Tungsten trioxide (WO₃) is a promising semiconductor due to its suitable bandgap, efficient charge separation, environmental friendliness, and low cost. However, WO₃ is unstable, mainly due to photocorrosion, chemical corrosion, and peroxide accumulation. This review provides a comprehensive summary of various modification strategies for WO₃-based photoanodes, including fundamental modification, doping-induced modification, multilayer structure modification, and external factors modulation. The focus is on assessing the impact of these modification strategies on material stability and evaluating their overall effectiveness. This review aims to provide valuable insights into the design and fabrication of highly stable WO₃ semiconductor materials and explores the future prospects and challenges of their application in PEC water splitting.

光电化学（PEC）分水技术是一种将太阳能转化为化学能的前景广阔的绿色技术，在清洁能源生产方面具有巨大潜力。然而，开发稳定的光阳极仍然是大规模应用的重大挑战。三氧化钨（WO3）具有合适的带隙、高效的电荷分离、环保和低成本等优点，是一种前景广阔的半导体。然而，WO3 并不稳定，主要原因是光腐蚀、化学腐蚀和过氧化物积累。本综述全面总结了针对基于 WO3 的光阳极的各种改性策略，包括基本改性、掺杂诱导改性、多层结构改性和外部因素改性。重点是评估这些改性策略对材料稳定性的影响，并评价其整体效果。本综述旨在为高稳定性 WO3 半导体材料的设计和制造提供有价值的见解，并探讨其在 PEC 水分离中应用的未来前景和挑战。

{"title":"Strategies for enhancing the stability of WO3 photoanodes for water splitting: A review","authors":"Huijing Yang , Songjie Li , Shuang Yu , Xiaomei Yu , Hui Zhao , Chengduo Wang , Dehai Ping , Jin You Zheng","doi":"10.1016/j.ces.2024.120894","DOIUrl":"10.1016/j.ces.2024.120894","url":null,"abstract":"<div><div>Photoelectrochemical (PEC) water splitting is a promising green technology for converting solar energy into chemical energy, with great potential for clean energy production. However, developing stable photoanodes remains a significant challenge for large-scale application. Tungsten trioxide (WO<sub>3</sub>) is a promising semiconductor due to its suitable bandgap, efficient charge separation, environmental friendliness, and low cost. However, WO<sub>3</sub> is unstable, mainly due to photocorrosion, chemical corrosion, and peroxide accumulation. This review provides a comprehensive summary of various modification strategies for WO<sub>3</sub>-based photoanodes, including fundamental modification, doping-induced modification, multilayer structure modification, and external factors modulation. The focus is on assessing the impact of these modification strategies on material stability and evaluating their overall effectiveness. This review aims to provide valuable insights into the design and fabrication of highly stable WO<sub>3</sub> semiconductor materials and explores the future prospects and challenges of their application in PEC water splitting.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"302 ","pages":"Article 120894"},"PeriodicalIF":4.1,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Superwetting materials for fog collection: From single function to smart responsive: A review 用于雾气收集的超湿润材料：从单一功能到智能响应：综述

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2024-11-03 DOI: 10.1016/j.ces.2024.120893

Jing Zhang , Jing Guang , Cheng Chen , Sahiya Sadik

Freshwater resources are becoming increasingly scarce in the worldwide, due to the rapid development of economy, the rising environmental pollution and the deterioration of water quality. Water collection, from the dense fogs in natural environment, were proven as an efficient way to address the above issue. In this review, the development on fog harvesting materials under environmental stimuli-responsive were presented. To start with, the traditional device for fog collection were introduced. Further, the bionic principles of natural organisms for capturing fog droplet, including spider silk, cactus needles, desert beetles, and others, were revealed, and then the current research on fog collection surfaces, with variable wettability responses to environmental stimuli contained temperature, light, photothermally, magnetic, and others, were overviewed in detail. It is expected that this review will help scholars to get a better grasp for the application of environmentally stimuli-responsive materials in fog collection and contributes to the development of fog collection technology.

由于经济快速发展、环境污染加剧和水质恶化，全球淡水资源日益匮乏。事实证明，从自然环境中的浓雾中收集水是解决上述问题的有效途径。本综述介绍了在环境刺激响应下雾采集材料的发展情况。首先，介绍了传统的雾收集装置。此外，还揭示了自然生物捕捉雾滴的仿生原理，包括蜘蛛丝、仙人掌针、沙漠甲虫等，然后详细介绍了当前关于雾收集表面的研究，这些表面对环境刺激（包括温度、光、光热、磁性等）具有不同的润湿性响应。希望这篇综述能帮助学者们更好地掌握环境刺激响应材料在雾收集中的应用，促进雾收集技术的发展。

{"title":"Superwetting materials for fog collection: From single function to smart responsive: A review","authors":"Jing Zhang , Jing Guang , Cheng Chen , Sahiya Sadik","doi":"10.1016/j.ces.2024.120893","DOIUrl":"10.1016/j.ces.2024.120893","url":null,"abstract":"<div><div>Freshwater resources are becoming increasingly scarce in the worldwide, due to the rapid development of economy, the rising environmental pollution and the deterioration of water quality. Water collection, from the dense fogs in natural environment, were proven as an efficient way to address the above issue. In this review, the development on fog harvesting materials under environmental stimuli-responsive were presented. To start with, the traditional device for fog collection were introduced. Further, the bionic principles of natural organisms for capturing fog droplet, including spider silk, cactus needles, desert beetles, and others, were revealed, and then the current research on fog collection surfaces, with variable wettability responses to environmental stimuli contained temperature, light, photothermally, magnetic, and others, were overviewed in detail. It is expected that this review will help scholars to get a better grasp for the application of environmentally stimuli-responsive materials in fog collection and contributes to the development of fog collection technology.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"302 ","pages":"Article 120893"},"PeriodicalIF":4.1,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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