Reaction Chemistry & Engineering最新文献

{"title":"Reassessment of caustic scrubbing for radioiodine capture during UNF processing","authors":"Randy Ngelale, Joanna McFarlane, Daniel Orea and Katherine R. Johnson","doi":"10.1039/D5RE00295H","DOIUrl":"https://doi.org/10.1039/D5RE00295H","url":null,"abstract":"<p >The effective removal of iodine-129 from gaseous emissions during used nuclear fuel processing is critical for minimizing environmental contamination and ensuring environmental regulatory compliance. Recent research has focused on optimizing process air, scrubber conditions, and integrating complementary techniques, such as solid sorbents as a polishing step, to improve iodine capture efficiency. The efficiency of a caustic scrubber is influenced by several factors, such as pH, temperature, gas–liquid contact time, and the presence of oxidants, yet the existing literature tends not to consider how these factors might interact or change in importance with process scaling. This perspective advocates for reconsidering how to mitigate many of these factors, especially in view of the transition from laboratory bench to pilot scale and beyond. This paper reviews the principles, operational parameters, and advancements in caustic aqueous scrubbing for radioiodine mitigation, aims to direct the next scientific pursuit of this technology, and inform environmental decision-making.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 10","pages":" 2225-2237"},"PeriodicalIF":3.1,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d5re00295h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121329","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}

{"title":"Short reaction times for hydrogenolysis of polyolefins by overcoming mass transfer limitations","authors":"E. van Daatselaar, A. G. J. van der Ham, S. R. A. Kersten and M. P. Ruiz","doi":"10.1039/D5RE00239G","DOIUrl":"https://doi.org/10.1039/D5RE00239G","url":null,"abstract":"<p >The recycling of polyolefins is gaining attention as society transitions toward a more circular economy. Pyrolysis is a promising method; however, its product distribution can be unpredictable. Moreover, the resulting compounds often require additional hydrogenation if they are to be used as feedstock for naphtha crackers. An alternative approach is hydrogenolysis, in which polyolefins are depolymerised into shorter, fully saturated alkanes using a heterogeneous catalyst under a hydrogen atmosphere. Literature indicates that the hydrogenolysis of polyolefins appears to be a slow process, requiring reaction times up to 96 hours to achieve a significant yield of useful products, such as naphtha or fuels. In this work, it is shown that these long reaction times are resolved when physical mass transport limitations are overcome: in 40 minutes, full conversion of low-density polyethylene to gas and liquid products is reached. Introducing a hollow-shaft mechanical stirrer instead of no or limited stirring significantly increases the gas contact area and mass transfer coefficient to the polymer melt, resulting in a decrease in mass transport limitations and thus an increase in overall reactivity. Monitoring the (hydrogen) pressure over time generates more insight into the reaction kinetics, as at a similar hydrogen consumption level, the product distribution changes if the system is stirred instead of kept stagnant. The authors would like to emphasise the importance of these findings regarding the influence of hydrogen mass transfer through the melt, as this could also result in novel catalysts possibly performing even better than currently reported, making hydrogenolysis a more viable option for the chemical recycling of polyolefins.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 10","pages":" 2238-2242"},"PeriodicalIF":3.1,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d5re00239g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121330","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}

{"title":"Monomeric immobilization of methylene blue on pure silica particles derived from industrial waste†","authors":"Reo Kimura, Sunao Chatani, Masahiko Inui, Satoshi Motozuka, Wanyu Shi, Iori Yamada and Motohiro Tagaya","doi":"10.1039/D5RE00094G","DOIUrl":"https://doi.org/10.1039/D5RE00094G","url":null,"abstract":"<p >Methylene blue (MB<small>⁺</small>) was mechanochemically immobilized on pure silica particles derived from industrial waste by hydrogen bonding and electrostatic interactions. The concentration of singlet oxygen (<small>¹</small>O<small>₂</small>) generated from MB<small>⁺</small> on the particles increased with increasing concentration of immobilized MB<small>⁺</small> monomers.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 9","pages":" 1989-1993"},"PeriodicalIF":3.1,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868523","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}

{"title":"Accelerating cross-modality reaction optimization via robotically automated vacuum enabled direct-inject mass spectrometry (RAVE MS)","authors":"Daniel A. Holland-Moritz, Sarah R. Moor, Joseph B. Parry, Elliot J. Medcalf, Claire M. Eberle, Andrew C. Strakham, Shane T. Grosser, Hang Hu, Noah P. Dunham and Maximilian Gantz","doi":"10.1039/D5RE00248F","DOIUrl":"https://doi.org/10.1039/D5RE00248F","url":null,"abstract":"<p >In this report, we detail direct inject mass spectrometry <em>via</em> a robotically automated vacuum enabled (RAVE) interface that utilizes commercially available capillary electrophoresis hardware to directly inject samples for mass spectrometry (MS) at a sampling rate of approximately 12 s per sample. This system enables direct electrospray ionization from standard 48, 96 or 384-well plates with minimal investment in hardware and utlilizes custom developed open source software that provides both autosampler control and analysis of raw extracted data from the mass spectrometer. We show a high level of correlation among results obtained with RAVE coupled MS, acoustic ejection (Echo) MS, and liquid chromatography coupled MS (LCMS) on 384 biocatalytically driven reactions. We additionally utilize RAVE MS on an array of 96 chemocatalytic reaction conditions to show that, while direct MS analysis can be challenging in complex mixtures, simple dilution followed by direct injection is often sufficient for analysis. With these results, we demonstrate the potential for RAVE MS to be utilized as a low-cost, low barrier to entry tool for rapid direct-inject MS analysis.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 10","pages":" 2243-2251"},"PeriodicalIF":3.1,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121331","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}

{"title":"Recent advancements in the electrocatalytic conversion of furfural to 2-methylfuran","authors":"Arvind Singh Chauhan, Omvir Singh, Amika, Reena Sharma, Deepak Kumar, Dinesh Kumar and Anil Dhanola","doi":"10.1039/D5RE00258C","DOIUrl":"https://doi.org/10.1039/D5RE00258C","url":null,"abstract":"<p >The electrochemical reduction of furfural to 2-methylfuran (MF) offers a green and efficient route for producing high-value biofuels and chemicals from biomass. This review critically examines the recent progress in the catalyst development, mechanistic understanding, and interface engineering strategies that enhance the selectivity for MF while mitigating side reactions such as the hydrogen evolution reaction (HER). Key factors including electrode materials, electrolyte pH, applied potential, and adsorption configuration are explored in detail. Although advances in operando characterization and theoretical modeling have begun to reveal the active sites and reaction pathways, challenges persist in achieving high selectivity and scalability. We identify the current limitations, such as the competing reactions, unclear active sites, and limited electrode diversity, and propose targeted solutions including dynamic interface tuning, molecular modifiers, and rational catalyst design. This review highlights the potential of electrocatalytic conversion of furfural to MF as a sustainable platform for future green chemical manufacturing.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 10","pages":" 2201-2224"},"PeriodicalIF":3.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121328","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}

{"title":"Outstanding Reviewers for Reaction Chemistry & Engineering in 2024","authors":"","doi":"10.1039/D5RE90026C","DOIUrl":"https://doi.org/10.1039/D5RE90026C","url":null,"abstract":"<p >We would like to take this opportunity to thank all of <em>Reaction Chemistry &amp; Engineering</em>'s reviewers for helping to preserve quality and integrity in chemical science literature. We would also like to highlight the Outstanding Reviewers for <em>Reaction Chemistry &amp; Engineering</em> in 2024.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 9","pages":" 1962-1962"},"PeriodicalIF":3.1,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868520","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}

{"title":"Revolutionizing chlorogenic acid production: cutting-edge synthetic biology strategies","authors":"Jianing Wu, Vipin Chandra Kalia, Jung-Kul Lee and Chunjie Gong","doi":"10.1039/D5RE00204D","DOIUrl":"https://doi.org/10.1039/D5RE00204D","url":null,"abstract":"<p >Chlorogenic acid, a bioactive compound with significant pharmacological and industrial value, is predominantly sourced through conventional extraction methods that exhibit resource dependency, high cost, inefficiencies, and environmental concerns. To address the dual challenges of surging market demand and environmental preservation, synthetic biology-driven microbial fermentation emerges as a pivotal sustainable strategy to overcome traditional production bottlenecks. Through rational design of metabolic networks, development of modular co-culture systems, and integration of intelligent regulation tools, efficient, resource-conserving, and environmentally benign chlorogenic acid production can be achieved. This study provides an innovative paradigm for the biomanufacturing of high-value chemicals.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 10","pages":" 2190-2200"},"PeriodicalIF":3.1,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121323","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}

{"title":"Boosting SAPO-34 catalyst longevity and activity in MTO processes via indium oxide doping: an experimental and theoretical study","authors":"Armin Abbasi, Jafar Towfighi Darian, Farshid Sobhani Bazghaleh and Masoud Safari Yazd","doi":"10.1039/D5RE00183H","DOIUrl":"https://doi.org/10.1039/D5RE00183H","url":null,"abstract":"<p >Metal oxides play a critical role in controlling coke formation, balancing reaction pathways, and enhancing the performance and durability of SAPO-34 catalysts in the methanol-to-olefin (MTO) process. This study focuses on indium oxide (In<small>₂</small>O<small>₃</small>) doping as a novel approach to address coke formation and extend catalyst lifespan. A comprehensive experimental and theoretical methodology was adopted, including detailed catalyst characterization, catalytic performance testing, and molecular dynamics (MD) simulations. Structural analyses confirmed that the CHA framework of SAPO-34 is preserved after doping, with modifications such as reduced crystallite size and increased mesoporosity, which enhance active site accessibility. Physicochemical characterization revealed that nitrogen adsorption showed increased mesopore volume while NH<small>₃</small>-TPD analysis indicated a balanced acid site redistribution in In-doped SAPO-34 (SP-I), collectively enhancing intermediate species stability and catalytic activity. MD simulations provided a mechanistic understanding of the In<small>₂</small>O<small>₃</small> impact, revealing its ability to suppress coke precursor (CHO-<em>θ</em>) formation, facilitate carbon removal <em>via</em> CO<small>₂</small> activation and the reverse Boudouard reaction, and enhance reaction reversibility. Catalytic performance testing validated these findings, with SP-I achieving prolonged activity, higher selectivity for light olefins (up to 80.3%), and greater resistance to deactivation compared to pristine SAPO-34. These findings underscore the efficacy of In<small>₂</small>O<small>₃</small> as a dopant for improving SAPO-34 catalysts and offer insights into the development of sustainable and efficient catalysts for industrial MTO applications.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 10","pages":" 2412-2423"},"PeriodicalIF":3.1,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121355","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}

{"title":"Opportunities for automation in continuous dynamic flow separation","authors":"Chetsada Khositanon, Panitan Thakhiew, Charoen Chinwanitcharoen, Kousuke Hiromori and Nopphon Weeranoppanant","doi":"10.1039/D5RE00215J","DOIUrl":"https://doi.org/10.1039/D5RE00215J","url":null,"abstract":"<p >Many separation techniques, such as chromatography, adsorption, and filtration, are dynamic by nature, with the profiles of chemical species varying over time. This time-dependent behavior makes dynamic flow separation inherently batchwise. Recently, automation has enabled the transformation of these batchwise processes into continuous operations. Automation devices, including separators, detectors/transmitters, control systems, and control devices, can be implemented for either open-loop or closed-loop control. In this minireview, we provide an overview of recent technologies for automated dynamic flow separation systems. Major automated separation techniques, such as liquid–liquid extraction, counter-current chromatography, flash chromatography, and dead-end filtration, are highlighted to illustrate how automation facilitates their transition to continuous operation. Additional examples of integrated reaction–separation systems and self-optimizing platforms for identifying optimal separation conditions are presented as part of the outlook for automated setups. Challenges related to accurate in-line detection, complex sample matrices, and varying physical properties are also addressed.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 9","pages":" 1978-1988"},"PeriodicalIF":3.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868522","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}

{"title":"Fe3O4@RHA@TiO2: preparation, characterization, and application in the nanocatalytic synthesis of tetrahydrobenzo[b]pyrans†","authors":"Zeinab Shahbazarab, Masoud Nasr-Esfahani and Morteza Montazerozohori","doi":"10.1039/D4RE00617H","DOIUrl":"https://doi.org/10.1039/D4RE00617H","url":null,"abstract":"<p >Magnetic core–shell nanostructures (for example, magnetic nanoparticles with a silica shell) are suitable substrates for catalyst stabilization. In this study, silica nanoparticles were obtained from rice husk. Then titanium dioxide was embedded in Fe<small>₃</small>O<small>₄</small>@RHA and the Fe<small>₃</small>O<small>₄</small>@RHA@TiO<small>₂</small> nanocatalyst was synthesized and identified using VSM, EDX, XRD, FE-SEM, and FT-IR techniques. This nanocatalyst had spherical particles with an average particle size of about 27 nm and good magnetic properties of about 23 emu g<small>⁻¹</small>. In this research, the optimization of the reaction parameters in the preparation of pyran derivatives was done through the multicomponent condensation of aromatic aldehyde, propanedinitrile (malononitrile), and dimedone by using the statistical technique of response surface methodology. Accordingly, the highest efficiency for the synthesis of pyran derivatives was obtained using 0.011 g of the Fe<small>₃</small>O<small>₄</small>@RHA@TiO<small>₂</small> nanocatalyst at the temperature range of 118–119 degrees in 53 minutes under solvent-free conditions. Titanium dioxide (TiO<small>₂</small>) provides sufficient acidic sites to facilitate the synthesis of pyran derivatives. Due to its low cost, high chemical stability, and non-toxicity, it serves as an excellent component for the fabrication of the Fe<small>₃</small>O<small>₄</small>@RHA@TiO<small>₂</small> nanocatalyst, making it highly efficient for organic synthesis. This method offers several advantages, including environmental friendliness, simplicity, green chemistry approach, cost-effectiveness, high yield, short reaction time, excellent recyclability, good physical and chemical stability, low catalyst loading requirement, and easy catalyst separation. These features make it a promising strategy for the preparation of pyran derivatives.</p>","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 10","pages":" 2386-2397"},"PeriodicalIF":3.1,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121353","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}