Reaction Chemistry & Engineering最新文献_第2页

Design and performance evaluation of low-volatility and low-viscosity absorbents for CO2 capture† 用于二氧化碳捕获的低挥发性和低粘度吸收剂的设计和性能评估†。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-28 DOI: 10.1039/D4RE00379A

Ning Ma, Liu Yang, Zhenchang Fang, Kaijia Jiang, Xinling Li and Zhen Huang

{"title":"Design and performance evaluation of low-volatility and low-viscosity absorbents for CO2 capture†","authors":"Ning Ma, Liu Yang, Zhenchang Fang, Kaijia Jiang, Xinling Li and Zhen Huang","doi":"10.1039/D4RE00379A","DOIUrl":"https://doi.org/10.1039/D4RE00379A","url":null,"abstract":"Deficiencies such as high viscosity, volatility, and rich phase precipitation limited the engineering application of non-aqueous absorbents. A series of high boiling point solvent screening experiments were conducted to develop an absorption saturated solution with a homogeneous phase at low viscosity (14.71 mPa s) in this study. Further addition of polyamines increased the absorption capacity by 42% (3.55 mol CO2 per kg). The 13C NMR results indicated that in the DETA/MEA/NMF blended amine system, MEA was involved in the deprotonation process of DETA zwitterions as proton acceptors. Quantum chemical calculations were utilized to compare the energies of each possible single-step reaction, providing insights into the reaction pathways of the blended amine system. The rate constant of the MEA/CO2 reaction was found to be 1.98 times that of the DETA/CO2 reaction, indicating lower reaction activity, consistent with NMR results. In addition, the results of the analysis of weak interactions revealed that the hydrogen bonds were key factors affecting the viscosity change and precipitation in non-aqueous absorbents, providing a new method for designing novel low-viscosity non-aqueous absorbents. The combination of theoretical analysis and experimental results underscores the potential of the blended amine non-aqueous absorbent as a feasible alternative for the industrial applications of CO2 capture.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 203-213"},"PeriodicalIF":3.4,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844652","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

Kinetic analysis of kraft lignin conversion via the Fenton process: process optimization and stochastic modelling† 通过 Fenton 工艺转化牛皮纸木质素的动力学分析：工艺优化和随机建模†。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-23 DOI: 10.1039/D4RE00401A

Lucas Ramos, Giovani Maltempi-Mendes, Adriano Francisco Siqueira, Diovana Aparecida dos Santos Napoleão and Anuj Kumar Chandel

{"title":"Kinetic analysis of kraft lignin conversion via the Fenton process: process optimization and stochastic modelling†","authors":"Lucas Ramos, Giovani Maltempi-Mendes, Adriano Francisco Siqueira, Diovana Aparecida dos Santos Napoleão and Anuj Kumar Chandel","doi":"10.1039/D4RE00401A","DOIUrl":"https://doi.org/10.1039/D4RE00401A","url":null,"abstract":"Lignin is a macromolecule with a highly branched and complex structure, making it difficult to degrade. It is a by-product of the pulp and paper industry and extensive treatment is required to mitigate environmental issues associated with effluent discharge. As an alternative, lignin can be treated through advanced oxidative processes (AOPs) using the Fenton reaction, which involves hydrogen peroxide (H2O2) and iron ions. In this context, a rotational central composite design (RCCD) was conducted to optimize lignin degradation using different molar ratios of H2O2/Fe2+ and H2O2/Fe3+ to assess the synergistic catalytic action of ions. The reactions were conducted in a batch reactor (2 L capacity), and a kinetic study of lignin degradation was performed using a stochastic model to characterize the oxidative process. Optimized conditions for the Fenton reaction were predicted, adopting a molar ratio of H2O2/Fe2+ of 9.0 and H2O2/Fe3+ of 6.0. The optimal conditions resulted in a 47.3% reduction in total organic carbon (TOC), reaching a conversion of over 80% in the depolymerization process. A quadratic model performed for the response variable TOC reduction showed a correlation coefficient (R2) of 0.926, indicating the model's quality and its ability to predict the variable with the greatest influence on the lignin depolymerization process. Further, Pseudomonas putida exhibited growth on low-molecular-weight aromatic molecules after depolymerization of kraft lignin.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 119-129"},"PeriodicalIF":3.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844635","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

Unveiling the dynamic CO2 capture performance of MgO promoted with molten salts and CaCO3via fixed bed reactor experiments† 通过固定床反应器实验揭示用熔盐和 CaCO3 促进氧化镁的动态二氧化碳捕集性能†。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-23 DOI: 10.1039/D4RE00432A

Theodoros Papalas, Andy N. Antzaras and Angeliki A. Lemonidou

{"title":"Unveiling the dynamic CO2 capture performance of MgO promoted with molten salts and CaCO3via fixed bed reactor experiments†","authors":"Theodoros Papalas, Andy N. Antzaras and Angeliki A. Lemonidou","doi":"10.1039/D4RE00432A","DOIUrl":"https://doi.org/10.1039/D4RE00432A","url":null,"abstract":"Carbonate looping using MgO-based materials has recently ignited scientific interest for CO2 capture at intermediate temperatures (275–375 °C), with the main limitation being the slow carbonation kinetics of MgO. Molten alkali nitrates and metal carbonates have been identified as promoters that provide an alternative reaction mechanism for an enhanced carbonation rate. However, the evaluation of the ability of these materials to effectively remove CO2 from a gas feed under realistic reactor configurations is still required. This study investigated the CO2 capture performance of magnesite-derived MgO promoted with limestone and molten Li, Na and K nitrates under carbonate looping conditions in a fixed bed reactor. The CO2 capture efficiency was enhanced in the presence of H2O, by increasing the gas–solid contact time and by decreasing the carbonation temperature. The evaluation demonstrated that ∼75% CO2 stripping of a gas feed with 30% CO2 concentration at 275 °C and a space velocity of 300 h−1 is possible, a performance that highlights and expands the potential and possible applications of MgO-based materials.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 168-176"},"PeriodicalIF":3.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d4re00432a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844640","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

Scalable electrocatalyzed formation of C–O bonds using flow reactor technology† 利用流动反应器技术可扩展地电催化形成 C-O 键†。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-21 DOI: 10.1039/D4RE00438H

Michael Prieschl, David Cantillo, C. Oliver Kappe and Gabriele Laudadio

引用次数: 0

Two-temperature model of the non-thermal chemical dissociation of CO2†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-21 DOI: 10.1039/D4RE00300D

Q. Shen, A. Pikalev, F. J. J. Peeters, J. Gans and M. C. M. van de Sanden

引用次数: 0

Transesterification or polymerization? Reaction mechanism and kinetics of 2-(diethylamino)ethyl methacrylate with methanol and the competitive effect on free-radical polymerization†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-21 DOI: 10.1039/D4RE00406J

Judith Cabello-Romero, Román Torres-Lubián, Javier Francisco Enríquez-Medrano, Adrián Ochoa-Terán, Jesús Jara-Cortés and Iván Zapata-González

{"title":"Transesterification or polymerization? Reaction mechanism and kinetics of 2-(diethylamino)ethyl methacrylate with methanol and the competitive effect on free-radical polymerization†","authors":"Judith Cabello-Romero, Román Torres-Lubián, Javier Francisco Enríquez-Medrano, Adrián Ochoa-Terán, Jesús Jara-Cortés and Iván Zapata-González","doi":"10.1039/D4RE00406J","DOIUrl":"https://doi.org/10.1039/D4RE00406J","url":null,"abstract":"Transesterification of 2-(diethylamino)ethyl methacrylate (DEAEMA) with methanol leads to the formation of methyl methacrylate (MMA) and 2-(diethylamino)ethanol; this alcoholysis reaction is studied by Density Functional Theory (DFT) calculations and in situ1H-NMR measurements. The transesterification mechanism involves the cooperative effect of methanol. Second-order transesterification kinetics and Arrhenius parameters (A and Ea) are reported. Furthermore, the competition between transesterification and (co)polymerization between DEAEMA and the MMA transesterification product, using 2,2-azobis (2-methylpropionitrile) (AIBN) as an initiator at 70 °C, has been analysed. In experiments with a DEAEMA : methanol molar ratio of 1 : 46 the copolymerization results in a large proportion of the MMA copolymer composition (FMMA) of 60 mol%; with an equimolar ratio the transesterification is avoided and the FMMA is only 2 mol%. FMMA can also be tuned by modification of the DEAEMA : AIBN molar ratio. Therefore, this work provides guidelines for the synthesis of well-defined poly(DEAEMA) and poly(DEAEMA-co-MMA) in primary alcohols.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 177-190"},"PeriodicalIF":3.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844650","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

Development and simulation of annular flow photoreactors: integration of light-diffusing fibers as optical diffusers with laser diodes†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-17 DOI: 10.1039/D4RE00400K

Sergio Carrillo De Hert, Rafael Lopez-Rodriguez, Michael J. Di Maso, Jonathan P. McMullen and Steven Ferguson

{"title":"Development and simulation of annular flow photoreactors: integration of light-diffusing fibers as optical diffusers with laser diodes†","authors":"Sergio Carrillo De Hert, Rafael Lopez-Rodriguez, Michael J. Di Maso, Jonathan P. McMullen and Steven Ferguson","doi":"10.1039/D4RE00400K","DOIUrl":"https://doi.org/10.1039/D4RE00400K","url":null,"abstract":"Continuous flow chemical photoreactors have emerged as a highly attractive platform, garnering considerable attention in both industry and academia. Utilizing thin channels, these reactors offer a promising solution for achieving more uniform irradiation in the reactor volume. While advancements have been enabled by the implementation of LEDs, significant limitations persist. These include managing the heat generated by light emitting diodes (LEDs), requiring proximity of electrical equipment and hot surfaces to flammable environments, ensuring operator safety amidst high levels of irradiating light, and addressing efficiency issues arising from irradiation of unintended areas, light scattering, and divergent photon emission. Herein, we introduce a novel approach that involves guiding photons emitted by a laser diode via total reflection optic fiber to an optical diffuser inside the reactor, specifically a light-diffusing fiber (LDF). This system capitalizes on the radial photon distribution capability of LDFs to irradiate the tubular annulus, enclosing all irradiation within it. The Continuous Annular Photoreactor (CAP-Flow system) effectively divorces photon generation from potentially explosive environments, enhancing safety, and operational convenience. The CAP-Flow system underwent testing via actinometry and a C–N coupling reaction across various flow rates and catalyst loadings. Our results found superior efficiency for the CAP-Flow system when compared to current LED configurations. The defined geometry, flow-field and photon absorption distribution facilitated mathematical modeling to de-convolute the reaction kinetics governing the photocatalytic process, offering valuable insights for optimizing operational parameters to enhance process understanding, productivity, and selectivity.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 251-266"},"PeriodicalIF":3.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/re/d4re00400k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844657","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

Bifunctional catalysts for the coupling processes of CO2 capture and conversion: a minireview 用于二氧化碳捕获和转化耦合过程的双功能催化剂：小视角

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-17 DOI: 10.1039/D4RE00334A

Chengxiong Dang and Hao Yu

{"title":"Bifunctional catalysts for the coupling processes of CO2 capture and conversion: a minireview","authors":"Chengxiong Dang and Hao Yu","doi":"10.1039/D4RE00334A","DOIUrl":"https://doi.org/10.1039/D4RE00334A","url":null,"abstract":"The integrated CO2 capture and utilization (ICCU) process can simultaneously achieve the reduction of CO2 emissions and the production of high-value products. Bifunctional catalysts with coupled catalytic and adsorption functions show great potential in the realization of ICCU. The aim of this study is to comprehensively review the recent research progress in the development of bifunctional catalysts. We first review the bifunctional catalysts used in the integrated CO2 capture and hydrogenation reaction including the RWGS and methanation reaction (ICCU-RWGS and ICCU-methanation). The effects of the adsorbent and catalyst components of bifunctional catalysts on the performance of ICCU-RWGS and ICCU-methanation including adsorption efficiency and catalytic activity are summarized. Then, we present the bifunctional catalysts applied in the integrated CO2 capture and dry reforming reaction (ICCU-DR). The optimization of bifunctional catalysts to improve their cyclic stability is reviewed. Finally, the applications of bifunctional catalysts that were developed for the integrated ICCU and sorption-enhanced steam reforming (SESR) reaction are demonstrated.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 10-21"},"PeriodicalIF":3.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844633","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

Kinetic insights into structure sensitivity of Ru catalyzed l-alanine hydrogenation to alaninol† Ru 催化 l-丙氨酸加氢生成丙氨醇的结构敏感性的动力学启示

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-17 DOI: 10.1039/D4RE00420E

Rui Song, Chang Yao, Wenhua Li, Nihong An, Yafeng Shen, Nina Fei, Xiaohu Ge, Yueqiang Cao, Xuezhi Duan and Xinggui Zhou

{"title":"Kinetic insights into structure sensitivity of Ru catalyzed l-alanine hydrogenation to alaninol†","authors":"Rui Song, Chang Yao, Wenhua Li, Nihong An, Yafeng Shen, Nina Fei, Xiaohu Ge, Yueqiang Cao, Xuezhi Duan and Xinggui Zhou","doi":"10.1039/D4RE00420E","DOIUrl":"https://doi.org/10.1039/D4RE00420E","url":null,"abstract":"Hydrogenation achieved on supported metal catalysts is normally structure sensitive, and comprehensive understanding of such sensitivity is pivotal for gaining insights into the active sites as well as the design of catalysts. Herein, a series of differently sized Ru nanoparticles supported on carbon nanotube (CNT) were prepared and employed as catalysts for L-alanine hydrogenation to examine the structure sensitivity of amino acid hydrogenation. The reaction rates for L-alanine conversion and the formation of alaninol are demonstrated to be strongly dependent on the sizes of Ru nanoparticles, highlighting the structure sensitivity of the L-alanine hydrogenation. The activation energies extracted from kinetic studies are insensitive to the sizes of Ru nanoparticles on the Ru catalysts sized ≥1.3 nm with similar electronic properties, pointing to a predominant type of active site for L-alanine hydrogenation. By further combining model calculations with the shape of Ru nanoparticles determined by transmission electron microscopy, the Ru(101) sites are identified as the dominant active sites for L-alanine conversion and alaninol formation, which is further rationalized by density functional theory calculations. The kinetic insights into such structure sensitivity are believed to be important for the design and optimization of catalysts for the reaction.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 135-145"},"PeriodicalIF":3.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844637","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

Linear scaling relationships in homogeneous photoredox catalysis† 均相光氧化催化中的线性比例关系†。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-15 DOI: 10.1039/D4RE00419A

Kareesa J. Kron and Shaama Mallikarjun Sharada

引用次数: 0