Reaction Chemistry & Engineering最新文献_第2页

Crystal facet engineering of metal oxides for upgrading biomass-derived oxygenates: a perspective

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-01-13 DOI: 10.1039/D4RE00562G

Zihao Liu, Yonghua Guo, Qingfeng Ge and Xinli Zhu

{"title":"Crystal facet engineering of metal oxides for upgrading biomass-derived oxygenates: a perspective","authors":"Zihao Liu, Yonghua Guo, Qingfeng Ge and Xinli Zhu","doi":"10.1039/D4RE00562G","DOIUrl":"https://doi.org/10.1039/D4RE00562G","url":null,"abstract":"Coordinatively unsaturated metal cations and oxygen anions on the surface of amphoteric metal oxides serve as acid and base centers, respectively, enabling a number of acid/base-catalyzed reactions. In particular, the O atom of oxygenates can readily coordinate with surface metal cations and can therefore initiate various reactions that are important for upgrading biomass-derived oxygenates. Metal oxide catalysts prepared via conventional methods expose various facets with distinct properties, making it difficult to elucidate the reaction chemistry and mechanism mediated on metal oxides at an atomic level. Advances in synthesis of nanocrystals of metal oxides with predominantly exposing a certain facet allow one to explore the reaction chemistry on well-defined metal oxide facets under real reaction conditions and thus may provide a powerful approach to investigate the facet-dependent structure–activity relationships of metal oxide-mediated reactions. In this perspective, we first elaborated on the fine structure and properties of various facets of TiO2 and CeO2 and then surveyed the dehydration/dehydrogenation of alcohols, ketonization of carboxylic acids, and aldol condensation of ketones and aldehydes mediated by metal oxides. In particular, we discussed the relationship between catalytic performances and the facet-dependent acid–base property and fine surface geometrical structure. Finally, we described challenges and opportunities associated with future research on metal oxide-mediated reactions via crystal facet engineering.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 4","pages":" 750-767"},"PeriodicalIF":3.4,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698422","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

Selenium-modified microgels as interfacial catalysts for the heterophase oxidation of aromatic aldehydes†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-01-10 DOI: 10.1039/D4RE00516C

Anastasiia Pavliuk, Oliver Fiukowski, Jan Wagner, Tetiana Kharandiuk, Volodymyr Ivasiv, Roman Nebesnyi, Uwe Schnakenberg and Andrij Pich

{"title":"Selenium-modified microgels as interfacial catalysts for the heterophase oxidation of aromatic aldehydes†","authors":"Anastasiia Pavliuk, Oliver Fiukowski, Jan Wagner, Tetiana Kharandiuk, Volodymyr Ivasiv, Roman Nebesnyi, Uwe Schnakenberg and Andrij Pich","doi":"10.1039/D4RE00516C","DOIUrl":"https://doi.org/10.1039/D4RE00516C","url":null,"abstract":"The use of selenium-modified microgels as interfacial catalysts offers a promising solution for the efficient and environmentally friendly oxidation of aromatic aldehydes. Our study highlights the use of mild reaction conditions (30–50 °C) and hydrogen peroxide as a green oxidant, taking advantage of a heterophase reaction system for the ease of product separation. The effectiveness of this system is demonstrated by the high yield of benzoic acid (95.6% with a selectivity of 96.6%) achieved in a toluene/water system at 50 °C and 8 hours reaction time. The versatility of this catalytic system is further highlighted by its successful application to various aldehydes – anisaldehyde (28.5% yield of anisic acid and 35.2% yield of mequinol), cinnamaldehyde (29.8% yield of cinnamic acid and 9.8% yield of hydrocoumarin), and veratraldehyde (39.0% yield of 3,4-dimethoxyphenol). Notably, the selenium-modified microgels exhibit excellent surfactant properties and interfacial catalytic activity in diverse heterophase organic/water solvent systems, such as chloroform/water (70.9% yield of benzoic acid), ethyl acetate/water (53.6% yield of benzoic acid), and 1-octanol/water (25.5% yield of benzoic acid and 23.3% yield of octylbenzoate). This adaptability expands the potential applications of these microgel catalysts. Moreover, the ease of catalyst recovery and good reusability of the microgel catalysts were confirmed over multiple reaction cycles, making them an attractive alternative for sustainable synthesis of aromatic acids and other oxidation processes.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 4","pages":" 782-789"},"PeriodicalIF":3.4,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698425","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

Rapid synthesis of uniform silicalite-1 zeolite via a micro-liquid film reactor-assisted approach†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-01-10 DOI: 10.1039/D4RE00556B

Jindong Ji, Hetong Wang, Guoli Fan, Minghao Zhao and Feng Li

{"title":"Rapid synthesis of uniform silicalite-1 zeolite via a micro-liquid film reactor-assisted approach†","authors":"Jindong Ji, Hetong Wang, Guoli Fan, Minghao Zhao and Feng Li","doi":"10.1039/D4RE00556B","DOIUrl":"https://doi.org/10.1039/D4RE00556B","url":null,"abstract":"In this work, silicalite-1 (S-1) zeolites with a uniform size of about 200 nm were rapidly synthesized by utilizing a micro-liquid film (MLF) reactor assisted hydrothermal method in a short period of 2 h, where the synthesis mixture solution underwent high-speed rotation and shear treatment in a thin liquid film zone within a short mixing time of 1–10 min at the premixing stage, yielding a homogeneous zeolite precursor colloidal suspension. It was revealed that the MLF reactor significantly enhanced the blending of the aqueous and organic phases containing the structure-directing agent and the silicon source, and the resulting homogeneous microenvironment of the zeolite precursor colloidal suspension facilitated the following hydrolysis process of the silicon source and polycondensation of initial structural units ([SiO4]) to a large extent, thereby greatly accelerating nucleation and crystallization processes and thus yielding uniform S-1 zeolite crystals. The present findings provide a viable, economical, and scalable strategy for rapid synthesis of various zeolite materials applied in advanced heterogeneous catalytic reactions.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 4","pages":" 864-875"},"PeriodicalIF":3.4,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698406","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

Self-optimising continuous-flow hydrothermal reactor for nanoparticle synthesis† 用于纳米粒子合成的自优化连续流水热反应器†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-01-09 DOI: 10.1039/D4RE00339J

Cameron Jackson, Karen Robertson, Vitaliy Sechenyh, Thomas W. Chamberlain, Richard A. Bourne and Edward Lester

引用次数: 0

Flat-plate mesophotoreactor with a serpentine channel and inclined baffles for balancing mixing performance and reaction throughput†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-01-09 DOI: 10.1039/D4RE00523F

Shuaiyu Chen, Qianrui Lv, Fujun Li, Yuchao Wang, Wenbo Yang, Zhimei Liu, Alexander A. Miskevich, Valery A. Loiko, Shengyang Tao and Lijing Zhang

{"title":"Flat-plate mesophotoreactor with a serpentine channel and inclined baffles for balancing mixing performance and reaction throughput†","authors":"Shuaiyu Chen, Qianrui Lv, Fujun Li, Yuchao Wang, Wenbo Yang, Zhimei Liu, Alexander A. Miskevich, Valery A. Loiko, Shengyang Tao and Lijing Zhang","doi":"10.1039/D4RE00523F","DOIUrl":"https://doi.org/10.1039/D4RE00523F","url":null,"abstract":"This study aims to address the main challenges encountered during the scale-up of flat-plate microreactors in photochemical processes: the decline in mixing and mass transfer efficiency, and the decrease in light energy utilization. Although microreactors have been widely studied for their efficient mass transfer and light energy utilization, the degradation of their performance during scale-up has limited their application in industrial production. Here, a strategy was explored to enhance the mixing efficiency by introducing inclined baffle structures within the mesoscale channel. The performances of a conventional 1 mm microreactor and an optimized mesoreactor with baffles were compared in the homogeneous photochemical reaction. The results indicated that under similar residence times, the yields of both reactors were nearly the same, but the reaction flux was increased by about 180 times compared to the microreactor. The characteristic mixing time (tm) and the second Damköhler number (DaII) for the mesoscopic reactor with baffles were similar to those of the microreactor. This result demonstrates the validity of the scale-up strategy in maintaining high mixing and mass transfer efficiency. The performance of the mesoreactor with baffles in heterogeneous reactions was also investigated, and high yields were achieved by extending the length of the reactor channel. The photochemical space time yield (PSTY) of the baffled mesoreactor with extended channels almost doubles that of the microreactor. This study provides an effective method for scaling up plate-type photochemical microreactors, opening up new possibilities for the application of microreactors in industrial production.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 4","pages":" 894-905"},"PeriodicalIF":3.4,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d4re00523f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient and convenient synthesis of methyl (S)-5-chloro-2-hydroxy-1-oxo-2,3-dihydro-1H-indene-2-carboxylate: a key intermediate for (S)-indoxacarb using aqueous TBHP as oxidant†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-01-06 DOI: 10.1039/D4RE00510D

Yun Zhang, Yao Du, Yan-Biao Chen, Jia-Huan Nie, Yue Xiong, Bao-Dong Cui, Xue-Qing Mou, Ming-Qiang Zhou and Yong-Zheng Chen

引用次数: 0

Interaction of light with gas–liquid interfaces: influence on photon absorption in continuous-flow photoreactors† 光与气液界面的相互作用：对连续流光反应器中光子吸收的影响。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-01-06 DOI: 10.1039/D4RE00540F

Jasper H. A. Schuurmans, Stefan D. A. Zondag, Arnab Chaudhuri, Miguel Claros, John van der Schaaf and Timothy Noël

{"title":"Interaction of light with gas–liquid interfaces: influence on photon absorption in continuous-flow photoreactors†","authors":"Jasper H. A. Schuurmans, Stefan D. A. Zondag, Arnab Chaudhuri, Miguel Claros, John van der Schaaf and Timothy Noël","doi":"10.1039/D4RE00540F","DOIUrl":"10.1039/D4RE00540F","url":null,"abstract":"Light interacts with gas bubbles in various ways, potentially leading to photon losses in gas–liquid photochemical applications. Given that light is a valuable ‘reagent’, understanding these losses is crucial for optimizing reactor efficiency. In this study, we address the challenge of quantifying these interactions by implementing a method that separately determines the photon flux and utilizes actinometric experiments to determine the effective optical path length, a key descriptor of photon absorption. The results reveal the unexpected impact of gas phase introduction in continuous-flow photoreactors. Notably, photon absorption, and consequently the throughput of a photoreactor, can be increased by the introduction of a gas phase. This enhancement arises from the reflection and refraction effects of gas bubbles, which can intensify light intensity in the liquid volume and thereby offset any loss in residence time. The photon absorption losses that were observed were associated with large bubbles and were less significant than anticipated. In contrast, the introduction of small bubbles was found to increase photon absorption, suggesting it is a potential strategy to optimize photoreactor performance.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 4","pages":" 790-799"},"PeriodicalIF":3.4,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11726180/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142996583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dehydration of xylose to furfural in a biphasic system: catalyst selection and kinetic modelling discrimination†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-01-04 DOI: 10.1039/D4RE00572D

Dominik Soukup-Carne, Ben Hillman, Christopher M. A. Parlett, Xiaolei Fan and Jesús Esteban

{"title":"Dehydration of xylose to furfural in a biphasic system: catalyst selection and kinetic modelling discrimination†","authors":"Dominik Soukup-Carne, Ben Hillman, Christopher M. A. Parlett, Xiaolei Fan and Jesús Esteban","doi":"10.1039/D4RE00572D","DOIUrl":"https://doi.org/10.1039/D4RE00572D","url":null,"abstract":"Furfural (Fur) represents an interesting bio-based platform chemical to pave the way to enhanced biorefinery integration in the modern chemicals industry. The production of this xylose- derived compound by its dehydration is catalysed by Brønsted acidity and has effectively been performed in biphasic systems using methyl isobutyl ketone (MIBK), where furfural is effectively partitioned. A selection of commercially available solid acid catalysts were evaluated (different ion exchange resins, zeolites and sulfated zirconia), with top candidates being subjected to recycling experiments over six runs with carbon deposition removal and acid site regeneration. A sulfated zirconia (SO2/ZrO2-1) catalyst proved effective with maximum yield of Fur of 53.8% after 180 min at 160 °C, with xylose conversion of 98.4%. A phenomenological approach to model developments was employed to describe the formation of each component of the reaction scheme and distribution in a biphasic system, with 18 separate kinetic models including both homo- and heterogeneous reaction pathways reported. The most optimal model, identified through statistical model discrimination (RMSE = 0.088), was a pseudohomogenous model with first-order reaction kinetics for xylose conversion to Fur via a reactive intermediate and second-order with respect to humin formation. Apparent activation energies for xylose dehydration were reported at 44.70 ± 7.89 kJ mol−1, with results stating the formation of Fur proceeded preferentially through this reactive intermediate.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 4","pages":" 839-855"},"PeriodicalIF":3.4,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d4re00572d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and properties of ionic photoacid generators based on iodonium salts†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-01-03 DOI: 10.1039/D4RE00575A

Rihong Liu, Baicheng Feng, Fanuan Yu, Huifen Xin, Rong Qu and Yan Jin

引用次数: 0

A highly stable LaCo0.75Fe0.25O3 perovskite catalyst supported on a ceramic monolith used for chlorobenzene combustion

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-27 DOI: 10.1039/D4RE00486H

Hector Acosta Perez, Flavia G. Durán, Luis E. Cadús and Fabiola N. Agüero

引用次数: 0