Reaction Chemistry & Engineering最新文献_第8页

Surface-charged β-glucosidase synergizes cellulase for cellulose affinity in ionic liquid pretreated biomass in situ saccharification† 在离子液体预处理的生物质原位糖化过程中，表面带电的β-葡萄糖苷酶可协同纤维素酶提高纤维素亲和力†。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-16 DOI: 10.1039/D4RE00466C

Yinghui Mu, Xin Ju, Cuiying Hu, Lishi Yan, Jiayi Tian, Su Ma and Liangzhi Li

{"title":"Surface-charged β-glucosidase synergizes cellulase for cellulose affinity in ionic liquid pretreated biomass in situ saccharification†","authors":"Yinghui Mu, Xin Ju, Cuiying Hu, Lishi Yan, Jiayi Tian, Su Ma and Liangzhi Li","doi":"10.1039/D4RE00466C","DOIUrl":"https://doi.org/10.1039/D4RE00466C","url":null,"abstract":"Protein surface charge engineering has promising applications for a deeper understanding of the adsorption and action mechanisms between enzymes and substrates. The engineering modification of β-glucosidase (BGL) is conducive to greatly reducing the negative feedback inhibition in biomass resource utilization and improving the utilization efficiency. Herein, the mutants BGL-14 and BGL-1, which had the largest difference in surface ζ-potential (−12.5 mV and −4.6 mV) obtained by rational design in previous studies, were selected to explore their adsorption behaviors on cellulose and lignin using an adsorption isotherm model. The results showed that more negative charges on the enzyme surface facilitated adsorptive contact with substrates while repelling lignin to reduce competitive adsorption, and that the monolayer coverage might be the main mechanism for cellulose/lignin adsorption of enzyme. Secondly, commercial cellulases were added to the modified BGLs to form a “cocktail” of enzymes (BGL-C) to synergistically participate in the in situ saccharification of biomass pretreated with ionic liquids (ILs). The BGL-14-C synergistic hydrolysis system presented a strong conversion ability in low concentrations of ILs, and its catalytic biomass production of reducing sugars at 5% (v/v) 1-ethyl-3-ethyl-imidazolium diethylphosphate ([EEIM]DEP) reached a yield of 1.24 g L−1, which was 130% and 136% of that of WT-C and BGL-1-C, respectively. BGL-1-C, on the other hand, exhibited higher thermal stability, with the catalytic rate remaining at 51% when the temperature was increased from 50 °C to 70 °C in 1-ethyl-3-methyl-imidazolium diethylphosphate ([EMIM]DEP). Our study delves into the role of enzyme surface charge in reducing unproductive adsorption and increasing the probability of contact with the substrate, providing a theoretical basis for understanding the role of surface charge in mixed systems.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 3","pages":" 706-718"},"PeriodicalIF":3.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine-learning-supported analysis of synergistic extraction systems towards enhanced selectivity of lithium extraction from brines 基于机器学习的协同萃取系统对提高盐水中锂萃取选择性的分析

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-16 DOI: 10.1039/D4RE00439F

Natalia Kireeva, Vladimir E. Baulin and Aslan Yu. Tsivadze

{"title":"Machine-learning-supported analysis of synergistic extraction systems towards enhanced selectivity of lithium extraction from brines","authors":"Natalia Kireeva, Vladimir E. Baulin and Aslan Yu. Tsivadze","doi":"10.1039/D4RE00439F","DOIUrl":"https://doi.org/10.1039/D4RE00439F","url":null,"abstract":"The development of technologies concerned with extraction and separation processes aimed at the sustainable production of rare metals, as well as at metal recycling, is in high demand. This study presents machine-learning-supported analysis of the experimental data on synergistic binary extraction systems for selective extraction of lithium from brines. We consider the narrow class of extraction systems that combine β-diketonate ligands (4,4,4-trifluoro-1-phenyl-1,3-butanedione (HBTA), 2-thenoyl-trifluoroacetone (HTTA), 1-heptyl-3-phenyl-1,3-propanedione (LIX54), 2,2-dimethyl-6,6,7,7,8,8-heptafluoro-3,5-octanedione (HFDOD)) and neutral organophosphorus ligands, such as trioctylphosphine oxide (TOPO), tributyl phosphate (TBP), triphenylphosphine oxide (TPPO) and trialkylphosphine oxide (TRPO). In this study, an analysis of the literature on the synergistic systems published to date was provided. This analysis has allowed distillation of the common characteristics of the formed hydrogen-bond-supported associates for the binary systems investigated to date. These results readily fit into the theory of eutectics and the chemistry of solvation processes. Currently, an urgent goal of the experimental research in this field is the optimization of processes that allow the selective extraction of lithium from brines of various compositions, including brines containing both alkali and alkaline earth metals. The benefits of liquid–liquid extraction and separation methods, which are concerned with the capacity of the corresponding systems to extract target metals from diluted media, require a deep understanding of the processes occurring at the interface of the two immiscible liquid phases, as well as in both the aqueous and organic phases themselves. This allows the recommendation of appropriate compositions of binary systems, along with the corresponding technological parameters of extraction and separation for certain brine compositions, using machine learning.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 3","pages":" 625-645"},"PeriodicalIF":3.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The “factory in a lab”: telescoping the Matteson and Matteson–Hoppe–Aggarwal boronate chemistry under flow conditions†‡ “实验室里的工厂”：流动条件下的mattson和mattson - hoppe - aggarwal硼酸化学

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-12 DOI: 10.1039/D4RE00394B

Florian Fricke, Gerald Dräger and Andreas Kirschning

引用次数: 0

Effects of Mn promotion on the structure and catalytic performance of Co2C-based catalysts for the Fischer–Tropsch to olefin reaction† 锰的促进对用于费托合成烯烃反应的 Co2C 基催化剂的结构和催化性能的影响†.

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-11 DOI: 10.1039/D4RE00515E

Xinxing Wang, Xuan Zhou, Huachen Shen, Wen Chen, Yunlei An, Yuanyuan Dai and Tiejun Lin

{"title":"Effects of Mn promotion on the structure and catalytic performance of Co2C-based catalysts for the Fischer–Tropsch to olefin reaction†","authors":"Xinxing Wang, Xuan Zhou, Huachen Shen, Wen Chen, Yunlei An, Yuanyuan Dai and Tiejun Lin","doi":"10.1039/D4RE00515E","DOIUrl":"https://doi.org/10.1039/D4RE00515E","url":null,"abstract":"An investigation into the effect of an Mn promoter on the structure and catalytic performance of Co3O4 catalysts for the Fischer–Tropsch to olefin (FTO) reaction was conducted. It was found that the introduction of the Mn promoter into Co3O4 precursors altered the morphology of the catalytic active phase from Co2C nanospheres to Co2C nanoprisms with specifically exposed facets of (101) and (020), which exhibited enhanced activity and C=2–4 selectivity compared to those of Mn-free Co2C nanospheres. Further studies suggested that the Mn promoter could interact with Co to form CoxMn1−xO intermediates, which were readily involved in the formation of Co2C nanoprisms rather than Co2C nanospheres. Additionally, Mn-doping improved CO adsorption capacity, creating a C-rich and H-poor micro-environment around Co2C active sites. As a result, the as-prepared 10Mn/Co3O4 catalyst exhibited the highest activity (25.8 C%) and C=2–4 selectivity (54.1 C%) together with a relatively lower CH4 selectivity (8.5 C%). Moreover, product distribution significantly deviated from classical Anderson–Schulz–Flory (ASF) distribution. However, excessive Mn addition would cover the Co2C active sites, leading to decreased catalytic activity and olefin selectivity.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 3","pages":" 550-560"},"PeriodicalIF":3.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic flow experiments for Bayesian optimization of a single process objective† 单过程目标贝叶斯优化的动态流动实验

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-11 DOI: 10.1039/D4RE00543K

Federico Florit, Kakasaheb Y. Nandiwale, Cameron T. Armstrong, Katharina Grohowalski, Angel R. Diaz, Jason Mustakis, Steven M. Guinness and Klavs F. Jensen

引用次数: 0

Highly efficient and selectivity controllable aerobic oxidation of ethyl lactate to ethyl pyruvate over VxOy/NC catalysts† VxOy/NC催化剂催化乳酸乙酯高效、选择性可控好氧氧化制丙酮酸乙酯

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-11 DOI: 10.1039/D4RE00465E

Zonghui Liu, Jing Xu, Lei Cui, Na Liu, Bing Yan and Bing Xue

{"title":"Highly efficient and selectivity controllable aerobic oxidation of ethyl lactate to ethyl pyruvate over VxOy/NC catalysts†","authors":"Zonghui Liu, Jing Xu, Lei Cui, Na Liu, Bing Yan and Bing Xue","doi":"10.1039/D4RE00465E","DOIUrl":"https://doi.org/10.1039/D4RE00465E","url":null,"abstract":"Developing effective catalysts for the selective oxidative dehydrogenation of ethyl lactate (EL) to value-added ethyl pyruvate (EP) is of great significance in biomass utilization. Herein, a series of VxOy/NC_P (P denotes the NC precursor) catalysts were synthesized by a convenient impregnation–decomposition method, which can effectively catalyze EL to EP with high activity and stability. These catalysts were characterized by XRD, N2 physisorption, XRF, SEM, TEM, XPS, and H2-TPR in detail. When methenamine was used as the precursor, 98% EL conversion and 99% EP selectivity were achieved at 130 °C for only 0.5 h of the reaction, outperforming most catalysts in the literature. The high activity of VxOy/NC_methenamine is attributed to the presence of a large amount of pyridinic-N and low valence vanadium species. H2-TPR results show that VxOy/NC_methenamine presents the lowest reduction temperature and highest H2 consumption, which is also consistent with the experimental results. Moreover, this catalyst could be reused for at least five cycles without significant deactivation.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 3","pages":" 676-685"},"PeriodicalIF":3.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-regulating effect of Al–Si microencapsulated phase change material-based catalyst support on ammonia decomposition† Al-Si微囊化相变材料基催化剂载体对氨分解的热调节作用

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-10 DOI: 10.1039/D4RE00380B

Cholila Tamzysi, Yuto Shimizu, Tomokazu Nakamura, Melbert Jeem, Keita Tanahashi, Takahiro Kawaguchi, Kengo Mimura, Ade Kurniawan and Takahiro Nomura

{"title":"Thermo-regulating effect of Al–Si microencapsulated phase change material-based catalyst support on ammonia decomposition†","authors":"Cholila Tamzysi, Yuto Shimizu, Tomokazu Nakamura, Melbert Jeem, Keita Tanahashi, Takahiro Kawaguchi, Kengo Mimura, Ade Kurniawan and Takahiro Nomura","doi":"10.1039/D4RE00380B","DOIUrl":"https://doi.org/10.1039/D4RE00380B","url":null,"abstract":"Ammonia is important for energy diversification and security due to its ability to transport hydrogen in the form of relatively safe and high-energy-density compounds. Ammonia decomposes into hydrogen and nitrogen gases via a highly endothermic catalytic process. For an endothermic reversible reaction, an undesirable decrease in the reactor temperature shifts the operating line to a lower equilibrium conversion point, resulting in an economic loss for the plant. The objective of this study was to develop a strategy to provide alternative energy to the endothermic reaction during the decrease in temperature. Accordingly, an Al–Si-based microencapsulated phase change material (MEPCM) was used as a heat-regulating catalyst for the ammonia decomposition reaction. The MEPCM structure consists of a spherical oxide shell and metal core that can store thermal energy based on the principle of latent heat storage. Different transition metals, such as Ni, Co, and Fe, were impregnated into the as-prepared 45 μm Al–Si MEPCM catalyst support with a core melting point of 577 °C and heat storage capacity of 285 J g−1. The effects of these metals on the reaction performance were then evaluated. Furthermore, various parameters such as the phase composition, morphology, and thermal properties of the samples were characterized using X-ray diffraction, Brunauer–Emmett–Teller analysis, scanning electron microscopy-energy-dispersive X-ray spectroscopy, and differential scanning calorimetry. Under controlled cooling, the pre-melted core demonstrated heat regulation ability by maintaining a higher temperature and achieving 2–14% higher conversion than the solid core state. By implementing the concept proposed herein, chemical industries can improve their technology to stabilize the reaction temperature.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 3","pages":" 593-604"},"PeriodicalIF":3.4,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Competition between ammonia and nitrogen oxides during nitrogen fixation using N2 and H2O plasma without catalysis 在没有催化作用的情况下，利用N2和H2O等离子体固氮过程中氨和氮氧化物之间的竞争

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-09 DOI: 10.1039/D4RE00503A

Yuanyuan Wang, Bing Sun, Zhonglin Yu, Shaohua Sun, Jinglin Liu, Yanbin Xin and Xiaomei Zhu

{"title":"Competition between ammonia and nitrogen oxides during nitrogen fixation using N2 and H2O plasma without catalysis","authors":"Yuanyuan Wang, Bing Sun, Zhonglin Yu, Shaohua Sun, Jinglin Liu, Yanbin Xin and Xiaomei Zhu","doi":"10.1039/D4RE00503A","DOIUrl":"https://doi.org/10.1039/D4RE00503A","url":null,"abstract":"The global energy crisis highlights the need for sustainable energy solutions. Nitrogen fixation, converting N2 into valuable products, is gaining attention. In this study, we investigate the effect of water vapor in gas-phase nitrogen fixation via gas–liquid mixed-phase pulsed discharge. Results show that increasing water vapor enhances nitrogen fixation efficiency but introduces a competitive mechanism between NH4+ and NOx. This study examines the effect of water vapor on nitrogen fixation via pulsed discharge at 20 kV and 10 Hz. When water vapor content reached 100%, NH4+ concentration decreased by 49.2%, while NO3− concentration increased by 19%. Additionally, raising the liquid temperature from 6 °C to 80 °C reduced NH4+ by 57.6% and increased NO3− by 54.1%. Spectral diagnostics and radical scavenging experiments confirmed the key role of H and OH radicals in the fixation process. Reaction kinetics analysis further validated the competition between NH4+ and NOx synthesis. While water as a raw material is critical for green nitrogen fixation, its impact on product distribution must be considered in optimizing future applications.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 2","pages":" 466-476"},"PeriodicalIF":3.4,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Paper strips loaded with ultrathin gold nanowires: catalytic activity and stability in the p-nitrophenol reduction† 载超薄金纳米线的纸条：对硝基苯酚还原的催化活性和稳定性

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-09 DOI: 10.1039/D4RE00443D

María S. Alvarez Cerimedo, Lucila I. Doumic, Cristina E. Hoppe and María A. Ayude

{"title":"Paper strips loaded with ultrathin gold nanowires: catalytic activity and stability in the p-nitrophenol reduction†","authors":"María S. Alvarez Cerimedo, Lucila I. Doumic, Cristina E. Hoppe and María A. Ayude","doi":"10.1039/D4RE00443D","DOIUrl":"https://doi.org/10.1039/D4RE00443D","url":null,"abstract":"Oleylamine-coated ultrathin gold nanowires (AuNWs) were utilized to create catalytic platforms by simply dropping the colloidal synthesis product onto filter paper strips without additional treatment. These platforms were tested for their ability to catalyze the reduction of p-nitrophenol (p-NP) to p-aminophenol (p-AP) using sodium borohydride as the reducing agent. Reactions were monitored in a stirred batch recycle reactor with in situ spectrophotometric measurements, and kinetic parameters were analyzed using the Langmuir–Hinshelwood model, taking into account the residence time distribution in the experimental setup. The catalytic activity halted when the catalyst was removed, indicating a heterogeneous process with no leaching. The AuNW platforms showed reusability, successfully operating in over 20 cycles with stable activity after the initial 12 cycles. Even after harsh pretreatments, catalytic performance remained acceptable, demonstrating system robustness. The study also examined how operational conditions like p-NP and NaBH4 concentrations, as well as the number of paper strips, affected performance. The increased exposed area from using multiple strips enhanced catalytic activity. These results highlight the potential for scalable and robust industrial use of paper-supported ultrathin AuNWs without extensive washing or pretreatment.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 3","pages":" 614-624"},"PeriodicalIF":3.4,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advances in metal/zeolite catalysts for C1–C8 alkane dehydroaromatization 用于 C1-C8 烷烃脱氢芳构化的金属/沸石催化剂的研究进展

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-09 DOI: 10.1039/D4RE00538D

Yi Zhai, Wenqian Li, Qinming Wu, Na Sheng and Feng-Shou Xiao

引用次数: 0