Reaction Chemistry & Engineering最新文献

Correction: Optimization of low-temperature pyrolysis of dioxins in fly ash from municipal solid waste incineration: adding catalysts and inhibitors 修正：城市生活垃圾焚烧飞灰中二恶英低温热解的优化：添加催化剂和抑制剂

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-07-10 DOI: 10.1039/D5RE90022K

Zhuoyu Wen, Weishi Li, Li Li, Xiaoting Li, Dahai Yan and Yang Liao

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Continuous flow photochemical synthesis of metal–ceramic composite microparticles† 金属-陶瓷复合微粒的连续流光化学合成

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-07-01 DOI: 10.1039/D5RE00199D

Hsin-Mei Kao, Kwangtae Son, Cheng-Hsiao Tsai, Ningmo Cheng, Changqing Pan, Nahal Ghanadi, Somayeh Pasebani, Brian K. Paul and Chih-Hung Chang

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Unraveling the role of ultrasound in hydrothermal interzeolite conversion using a tubular ultrasound-integrated reactor. 利用管式超声集成反应器揭示超声在热液沸石间转化中的作用。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-25 DOI: 10.1039/d5re00149h

Elena Brozzi, Michiel Dusselier, Simon Kuhn

{"title":"Unraveling the role of ultrasound in hydrothermal interzeolite conversion using a tubular ultrasound-integrated reactor.","authors":"Elena Brozzi, Michiel Dusselier, Simon Kuhn","doi":"10.1039/d5re00149h","DOIUrl":"10.1039/d5re00149h","url":null,"abstract":"In the past years, ultrasound has been considered a sustainable process intensification technique for zeolite synthesis. However, understanding the link between ultrasound phenomena and their related effects has remained a challenge due to the limited availability of hydrothermal ultrasonic reactors and parameter standardization among the studies. In this work, a novel ultrasound-integrated tubular coiled reactor is presented, which enables fast and efficient ultrasonic hydrothermal zeolite synthesis. Specifically, the effect of ultrasound irradiation and its underlying mechanisms on high silica FAU-to-MFI interzeolite conversion is studied. Unseeded syntheses in the presence of an organic structure-directing agent (OSDA) are performed at 160 °C for residence times up to 2 h. The presence of hydroxyl radicals generated by ultrasound is assessed via terephthalic acid dosimetry at different temperatures and pressures as a measurement of the cavitation activity. The application of 20 W mL-1 of suspension reveals an enhanced MFI growth rate and faster crystallization completion, resulting in an overall increase in the mean crystal size. Ultrasound is also successful in counteracting solid deposition on the walls of the coiled reactor. Applying hydrothermal conditions to this setup suppresses radical formation, indicating very weak transient cavitation activity. Therefore, these observations are attributed to the enhanced mass transfer via ultrasonic wave propagation, which renders the dissolved material more readily available for crystal growth.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12223963/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574514","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}

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Quantification of the porosity in template-based ordered porous Ag electrodes and its effect on electrochemical CO₂ reduction. 模板基有序多孔银电极孔隙率的量化及其对电化学CO2还原的影响。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-25 DOI: 10.1039/d5re00068h

Maaike E T Vink-van Ittersum, Erik Betz-Güttner, Eric Hellebrand, Claudia J Keijzer, Matt L J Peerlings, Peter Ngene, Petra E de Jongh

{"title":"Quantification of the porosity in template-based ordered porous Ag electrodes and its effect on electrochemical CO2 reduction.","authors":"Maaike E T Vink-van Ittersum, Erik Betz-Güttner, Eric Hellebrand, Claudia J Keijzer, Matt L J Peerlings, Peter Ngene, Petra E de Jongh","doi":"10.1039/d5re00068h","DOIUrl":"10.1039/d5re00068h","url":null,"abstract":"The electrochemical reduction of CO2 combined with efficient CO2 capture is a promising approach to close the carbon cycle. We studied the effect of pore size on the activity and selectivity of porous Ag electrodes using template-based electrodes as model catalysts. Using polymer spheres with sizes between 115 nm and 372 nm as templates, ordered porous Ag catalysts with different pore diameters were obtained. These well-defined model systems allowed us to understand the effect of pore size on CO and H2 production. At the most cathodic potential, around -1.05 V, up to 4 times more CO than H2 was formed. The intrinsic CO production depends on the pore size, as it increases when changing the pore diameters from ∼100 nm to ∼300 nm. At pore diameters above ∼300 nm, the pore size does not affect the intrinsic CO production anymore. For the first time, FIB-SEM was used to quantitatively analyse the porosity of the electrodes and correlate it with trends in intrinsic activity. The catalyst with a pore diameter of ∼200 nm had the highest tortuosity of 2.41, which led to an increased CO production. The catalysts with a pore diameter of ∼200 nm and smaller have pore networks that are twice as long as the pore network of catalysts with ∼400 nm pores. This leads to an additional potential drop, which lowers the effective driving force for the electrochemical reaction. Disentanglement of these different factors is important for rational design of porous CO2 reduction catalysts.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12188718/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144525550","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

Kinetically tunable, subzero-active, visual time–temperature indicators based on the permanganate–oxalate reaction† 动力学可调，亚零活性，基于高锰酸盐-草酸盐反应的视觉时间-温度指示器

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-16 DOI: 10.1039/D5RE00192G

Jorvani Cruz Villarreal, Emil Ljungberg, Nilojan Jehanathan, Milap Owens, Anika Li and Chad R. Borges

{"title":"Kinetically tunable, subzero-active, visual time–temperature indicators based on the permanganate–oxalate reaction†","authors":"Jorvani Cruz Villarreal, Emil Ljungberg, Nilojan Jehanathan, Milap Owens, Anika Li and Chad R. Borges","doi":"10.1039/D5RE00192G","DOIUrl":"https://doi.org/10.1039/D5RE00192G","url":null,"abstract":"Biological products and specimens often require consistent ultracold storage to preserve their integrity. Existing time–temperature indicators (TTIs) are inadequate for monitoring ultracold conditions at the individual aliquot level. We adapted the autocatalytic permanganate–oxalate reaction to create visual TTIs functional below 0 °C. Using eutectic compositions of LiClO4, NaClO4, and Mg(ClO4)2, we depressed the melting points of the reaction mixtures to −18 °C, −37 °C, and −67 °C, respectively. The incorporation of perchlorate salts as antifreeze systems did not derail the kinetic behavior of the permanganate–oxalate reaction and allowed the reactions to pause below their melting points. Here, we developed and characterized eight customized TTIs, running from five minutes at 25 °C to 7 days at −20 °C. Temperature sensitivity was consistent with Arrhenius behavior (i.e., exponential increases in run time with linear decreases in temperature). The TTIs exhibited good accuracy and reproducibility, with within-batch and between-batch run-time precision at the targeted temperatures of ≤4.8% CV and ≤7.5% CV, respectively. The average absorbance vs. time trajectories, expressed as RMSD %CVs, were 4.5% for intra-batch and 10.4% for inter-batch runs. Indicators withstood multiple freeze/thaw cycles or extended pre-freezing periods with minimal impact on reaction kinetics. Once activated and stored below their melting points, TTIs maintained color intensity for at least 12 months. This work establishes the permanganate–oxalate system in eutectic perchlorate-based antifreeze solutions as a simple, inexpensive approach for ultracold-active TTIs, offering customizable kinetics and robust performance. The described TTIs can serve to improve quality monitoring of biologicals and biospecimens during ultracold storage and handling.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 8","pages":" 1741-1757"},"PeriodicalIF":3.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680940","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}

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Metal and non-metal oxide-supported selenium as potential industrial catalysts 金属和非金属氧化物负载的硒作为潜在的工业催化剂

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-06-10 DOI: 10.1039/D5RE00066A

Meng Ge, Tao Ju, Yiyang Zhang and Daming Yong

引用次数: 0

Recent development of non-noble metal catalysts for the oxygen evolution reaction (OER) under different pH 不同pH值下析氧反应（OER）非贵金属催化剂的研究进展

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-05-20 DOI: 10.1039/D5RE00148J

Weijie Liu and Kai Wang

{"title":"Recent development of non-noble metal catalysts for the oxygen evolution reaction (OER) under different pH","authors":"Weijie Liu and Kai Wang","doi":"10.1039/D5RE00148J","DOIUrl":"https://doi.org/10.1039/D5RE00148J","url":null,"abstract":"With the advent of the new energy revolution, higher demands have been placed on green hydrogen production. The OER, as the anodic reaction in water electrolysis for hydrogen, involves a four-electron transfer process and has a high energy barrier. Therefore, the development of efficient OER catalysts is crucial. Though IrO2 has been widely applied in lab research, its low abundance in the Earth's crust poses significant challenges for large-scale industrial utilization. As a result, numerous studies have been dedicated to developing non-noble metal catalysts to replace IrO2, and it has been revealed that the pH conditions are crucial for the activity and stability of OER catalysts. Therefore, this review starts from the OER mechanisms under different pH conditions, and discusses the preparation methods, regulation strategies, and performance of non-noble metal catalysts under different pH conditions. It covers a variety of catalysts, including Co-, Ni-, Mn-, NiFe-based materials and high-entropy alloys, and introduces various regulation methods such as doping, defect engineering, morphology control, construction of heterojunction, electronic spin state regulation, and electrolyte engineering. Finally, it comprehensively assesses the application prospects of the catalysts under different pH conditions in conjunction with OER processes and equipment, providing a reference for future catalyst design and regulation engineering for OER technologies.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 8","pages":" 1704-1729"},"PeriodicalIF":3.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680937","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}

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Chemistry of catalytic cracking of cyclohexene and 1-methylcyclopentene† 环己烯和1-甲基环戊烯催化裂化的化学研究

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-05-19 DOI: 10.1039/D5RE00033E

Xueqian Zhang, Jiasong Yan, Shuai Yuan, Shanqing Yu, Qingyu Liu, Xikai Wang and Rui Li

{"title":"Chemistry of catalytic cracking of cyclohexene and 1-methylcyclopentene†","authors":"Xueqian Zhang, Jiasong Yan, Shuai Yuan, Shanqing Yu, Qingyu Liu, Xikai Wang and Rui Li","doi":"10.1039/D5RE00033E","DOIUrl":"https://doi.org/10.1039/D5RE00033E","url":null,"abstract":"Whether cycloalkanes undergo six- or five-membered ring-opening reaction pathways remains controversial. In this work, the catalytic cracking reactions of cyclohexene and 1-methylcyclopentene, as model compounds, were investigated in a pulse microreactor. The characteristics of the reactions of the two model compounds were compared in terms of isomerization, cracking, and hydrogen transfer reaction, and the reasons for the differences in their catalytic reactions were analyzed in combination with thermodynamic and molecular simulation calculations. The results have shown that the catalytic cracking product distributions of cyclohexene and 1-methylcyclopentene were similar owing to their easy mutual isomerization; the five-membered ring-opening cracking pathway was more thermodynamically advantageous than that of six-membered ring-opening cracking, and therefore, the yield of the ring-opening cracking product of 1-methylcyclopentene was comparatively higher; the main products of the hydrogen transfer reaction of the two compounds were alkanes and aromatic hydrocarbons. By comparing the product distributions and reaction activation energies, the ring-opening reaction pathways were clarified, and the catalytic cracking reaction networks of cyclohexene and 1-methylcyclopentene were established.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 8","pages":" 1870-1877"},"PeriodicalIF":3.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680962","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}

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Electrochemical hydrocarboxylation of styrene with CO2 in continuous flow† 连续流中苯乙烯与CO2的电化学羧化反应†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-05-16 DOI: 10.1039/D5RE00162E

Jonas Mortier, Christian V. Stevens and Thomas S. A. Heugebaert

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A comprehensive numerical analysis of NO generation routes and combustion characteristics with varying strain rates in methane/n-heptane dual fuel flames 甲烷/正庚烷双燃料火焰中不同应变速率下NO生成路径及燃烧特性的综合数值分析

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-05-14 DOI: 10.1039/D5RE00181A

Pengxiang Zhang, Jianfei Xi, Shuang Li, Guoqing Yang, Yunjun Wang, Yinggui Zhou and Jie Cai

{"title":"A comprehensive numerical analysis of NO generation routes and combustion characteristics with varying strain rates in methane/n-heptane dual fuel flames","authors":"Pengxiang Zhang, Jianfei Xi, Shuang Li, Guoqing Yang, Yunjun Wang, Yinggui Zhou and Jie Cai","doi":"10.1039/D5RE00181A","DOIUrl":"https://doi.org/10.1039/D5RE00181A","url":null,"abstract":"The influence of strain rate on the combustion characteristics and routes of NO formation in methane/n-heptane dual-fuel engines was scrutinized in this research, utilizing a counterflow flame model. The insights gleaned from this study provide valuable theoretical guidance for a more profound comprehension of the NO formation mechanism, thereby facilitating the enhancement and optimization of natural gas–diesel dual-fuel engines. The findings reveal that with an increasing strain rate, the peak flame temperature initially exhibits a slight increase followed by a decrease, while the heat release rate experiences a significant surge. Concurrently, the high-temperature region and the distribution areas of the main species and intermediate products are markedly reduced. The NO emission index undergoes initial fluctuations and then demonstrates a consistent decline with the increment of the strain rate, implying that a higher strain rate is conducive to curtailing NO formation. Relative to the enhancing effect of elevated O radical molar fractions on NO formation, the reduction in flame temperature exerts a more pronounced inhibitory influence on the generation of thermal NO. An elevated strain rate also intensifies the production of CH radicals, which in turn, bolsters the formation of prompt NO. Furthermore, an increase in strain rate accelerates the reaction between HCCO and CH2 radicals with NO, augmenting NO consumption and enhancing the reduction effect of the reburn route on NO. The contributions of the N2O intermediate route and the NNH intermediate route to NO generation are found to be negligible.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 8","pages":" 1845-1858"},"PeriodicalIF":3.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680928","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}

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