Journal of CO2 Utilization最新文献

筛选
英文 中文
Photocatalytic and surface consequences of thermal treatments on Pt nanoparticles onto carbon nitrides during CO2-to-CO conversion 在二氧化碳转化为二氧化碳的过程中,对氮化碳上的铂纳米颗粒进行热处理的光催化效应和表面效应
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-29 DOI: 10.1016/j.jcou.2025.103068
S. Vaquero-Vílchez , P. Nimax , E. Valtierra-Martinez , I. Ayesta , I. Agirrezabal-Telleria
{"title":"Photocatalytic and surface consequences of thermal treatments on Pt nanoparticles onto carbon nitrides during CO2-to-CO conversion","authors":"S. Vaquero-Vílchez ,&nbsp;P. Nimax ,&nbsp;E. Valtierra-Martinez ,&nbsp;I. Ayesta ,&nbsp;I. Agirrezabal-Telleria","doi":"10.1016/j.jcou.2025.103068","DOIUrl":"10.1016/j.jcou.2025.103068","url":null,"abstract":"<div><div>Photocatalysis is an emerging alternative to convert CO<sub>2</sub> into relevant products, but it faces technological challenges related to charge recombination and low efficiency. Thermally coupled gas phase photocatalysis can address these issues by lowering reaction temperatures and improving process efficiency. This work demonstrates that defect engineering, combined with Pt impregnation at various metal dispersion and sizes, can enhance photocatalytic properties in g-C<sub>3</sub>N<sub>4</sub> materials. Structural changes in g-C<sub>3</sub>N<sub>4</sub> and Pt oxidation state modification, significantly impact CO productivity from CO<sub>2</sub>. This study investigates how thermal treatments in H<sub>2</sub> affect defect and thus vacancy formation in g-C<sub>3</sub>N<sub>4</sub>. Materials with 2 wt% Pt<sup>2</sup><sup>+</sup> species generate C–N<sub>3</sub> vacancies, while Pt<sup>0</sup> species with the same content lead to both C–N<sub>3</sub> and N–C<sub>3</sub> vacancies– within g-C<sub>3</sub>N<sub>4</sub>. These differences exhibit distinct reaction trends under dark conditions or upon light irradiation. To further understand these effects, detailed XPS analyses clarify the impact of reaction conditions on the material after pretreatment and catalysis. The findings show that g-C<sub>3</sub>N<sub>4</sub> materials can reform their C–Nbonds after electron excitation through light exposure, enhancing and stabilizing the reaction's productivity. As a result, CO productivities up to 1.1 mmol·g<sub>cat</sub><sup>−1</sup>·h<sup>−1</sup> are achieved. This work is expected to contribute to understanding the effect of thermal treatment on carbon nitrides, particularly regarding defect engineering, and more broadly, the effects of temperature in photocatalysis.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103068"},"PeriodicalIF":7.2,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Elucidating operational drivers of CO2 transfer and utilization efficiency in photosynthetic algae cultivation systems
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-29 DOI: 10.1016/j.jcou.2025.103069
Mauro Lua , Everett Eustance , Arnav Deshpande , John McGowen , Lieve M.L. Laurens
{"title":"Elucidating operational drivers of CO2 transfer and utilization efficiency in photosynthetic algae cultivation systems","authors":"Mauro Lua ,&nbsp;Everett Eustance ,&nbsp;Arnav Deshpande ,&nbsp;John McGowen ,&nbsp;Lieve M.L. Laurens","doi":"10.1016/j.jcou.2025.103069","DOIUrl":"10.1016/j.jcou.2025.103069","url":null,"abstract":"<div><div>While photosynthetic algae-based systems have shown promise for reducing the carbon footprint associated with biofuel and biochemical production due higher yields than terrestrial crops, there are challenges associated with CO<sub>2</sub> delivery and utilization resulting from the chemical and physical environment experienced. Point-source CO<sub>2</sub> delivery is a critical component of intensive algal cultivation, but a significant fraction of the CO<sub>2</sub> sparged into the aqueous environment is lost. In this context, we review the theoretical considerations for deconvoluting carbon transfer efficiency (CTE) and carbon utilization efficiency (CUE), specifically in microalgal cultivation in response to changes in media formulation and alkalinity. We introduce an empirical and operational approach to increase the efficiency of CO<sub>2</sub> transfer and ultimately prime algal cultures for photosynthetic carbon assimilation. We define operational boundaries for improving CUE under a neutral pH regime, with conditions that maintain high algal biomass productivity. Our work supports both the implementation of strategies for increasing CUE as well as provides a framework for monitoring inorganic and organic carbon balances in controlled aqueous systems. The integration of water chemistry in media formulation with dissolved inorganic carbon (DIC) and alkalinity are primary drivers of the inorganic carbon flux from a concentrated CO<sub>2</sub> source towards an accessible carbon source for microalgae. We outline a systematic approach by leveraging control over carbon delivery, operational pH in the neutral pH regime, and alkalinity to match available DIC of the media with the demands of the algae to help optimize CTE and CUE. This control increases the feasibility of large-scale biotic CO<sub>2</sub> capture in aqueous systems.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103069"},"PeriodicalIF":7.2,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of particle breakage on the carbonation of argon oxygen decarburization slag - limitations and energy assessment
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-28 DOI: 10.1016/j.jcou.2025.103073
Nina Miladinović , Luka Ceyssens , Giuseppe Granata , Tom Van Gerven
{"title":"Impact of particle breakage on the carbonation of argon oxygen decarburization slag - limitations and energy assessment","authors":"Nina Miladinović ,&nbsp;Luka Ceyssens ,&nbsp;Giuseppe Granata ,&nbsp;Tom Van Gerven","doi":"10.1016/j.jcou.2025.103073","DOIUrl":"10.1016/j.jcou.2025.103073","url":null,"abstract":"<div><div>Disposing waste from the steel-making industry and the ongoing rise in global carbon dioxide emissions represent significant challenges to overcome. Carbonation of steel slags, the main waste material formed in steelmaking processes, is one of the possible solutions. In this research, three different kinds of mills are compared in order to most effectively approach the carbonation of argon oxygen decarburization (AOD) steel slag while simultaneously milled. Using breakage potential as a parameter for quantitative comparison, it is shown that the planetary ball mill is noticeably performing better than the vibratory mill and the McCrone mill – up to 39 % in terms of breakage of particles. The breakage potential correlates well with the carbonation rate at all three examined speeds (200 rpm, 500 rpm and 800 rpm) in the planetary ball mill. However, it is estimated that energy up to 120 kJ/g is used for the breakage of particles. Energy applied above this threshold contributes mainly to the agglomeration, but at different rates depending on the implemented speed. This difference is due to the varying contribution of two influencing parameters during simultaneous carbonation and milling - the presence of water and the number of collisions of the grinding balls with the AOD steel slag. The present work gives insights into the breakage of steel slag particles, their carbonation potential and limitations for achieving higher carbonation rates as well as predicted energy usage to obtain these processes.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103073"},"PeriodicalIF":7.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Orientational-growth of Cu2O {111} or {110} facets induced by frustules for CO2-H2O specific photo(electro)chemical conversion into methanol/ethanol under visible-light
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-27 DOI: 10.1016/j.jcou.2025.103071
Michele Aresta , Tomasz Baran , Domenico Caringella , Shambel G. Wasse , Yusuf I. Abubakar , Alessandra Petrucciani , Alessandra Norici , Ernesto Mesto , Elvira De Giglio , Roberto Comparelli , Angela Dibenedetto
{"title":"Orientational-growth of Cu2O {111} or {110} facets induced by frustules for CO2-H2O specific photo(electro)chemical conversion into methanol/ethanol under visible-light","authors":"Michele Aresta ,&nbsp;Tomasz Baran ,&nbsp;Domenico Caringella ,&nbsp;Shambel G. Wasse ,&nbsp;Yusuf I. Abubakar ,&nbsp;Alessandra Petrucciani ,&nbsp;Alessandra Norici ,&nbsp;Ernesto Mesto ,&nbsp;Elvira De Giglio ,&nbsp;Roberto Comparelli ,&nbsp;Angela Dibenedetto","doi":"10.1016/j.jcou.2025.103071","DOIUrl":"10.1016/j.jcou.2025.103071","url":null,"abstract":"<div><div>p-Type-semiconductor Cu<sub>2</sub>O facets {111} (<em>octahedral</em>) and {110} (<em>rhombododecahedral</em>) present a higher photo(electro)catalytic activity towards CO2RRs (CO<sub>2</sub> Reduction Reaction) than {100} (cubic). Two frustules (the siliceous skeleton of microalgae <em>Diatoms</em>) having a different morphology, namely: <em>Navicula sp.</em> (<em>Nsp</em>, elongated pore-shape) and <em>Conticribra weissflogii</em> (<em>Cw</em>, round pore-shape) have been used for the first time in this work as template for the orientational growth of Cu<sub>2</sub>O facets. Frustules are calcinated at 700 °C to avoid residual organics that may give false positives during photo(electro)catalysis. Each of the frustules is found to induce a facet of Cu<sub>2</sub>O preferentially. <em>Nsp</em> induces the {111} facet (Band-gap=2.26 eV), while <em>Cw</em> preferentially induces the {110} facet (Band-gap=1.96 eV). Under visible light irradiation, <em>Nsp</em>-grown Cu<sub>2</sub>O converts CO<sub>2</sub> and H<sub>2</sub>O into methanol, while <em>Cw</em>-grown Cu<sub>2</sub>O produces ethanol. The different behaviour is related to the different Cu-Cu distance (the active catalytic centres) in the two facets.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103071"},"PeriodicalIF":7.2,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mid-temperature CO2 deoxygenation to CO over Fe-CeO2 中温二氧化碳在 Fe-CeO2 上脱氧生成 CO
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-26 DOI: 10.1016/j.jcou.2025.103074
Jing-Ting Huang, Ruo-Yun Lin, Tzu-Hsun Tsai, Tzu-Peng Lin, Shawn D. Lin
{"title":"Mid-temperature CO2 deoxygenation to CO over Fe-CeO2","authors":"Jing-Ting Huang,&nbsp;Ruo-Yun Lin,&nbsp;Tzu-Hsun Tsai,&nbsp;Tzu-Peng Lin,&nbsp;Shawn D. Lin","doi":"10.1016/j.jcou.2025.103074","DOIUrl":"10.1016/j.jcou.2025.103074","url":null,"abstract":"<div><div>CO<sub>2</sub> capture and utilization is a must for easing the global warming caused by the uses of fossil fuels. We examine M-CeO<sub>2</sub> (M = Cu, Co, and Fe @M/Ce = 2/8) prepared by coprecipitation and hard template synthesis. Fe-CeO<sub>2</sub> is the only one showing thermal CO<sub>2</sub> deoxygenation to CO at below 700 °C after reduction. XRD analyses of as prepared Fe-CeO<sub>2</sub> demonstrate the presence of segregated Fe<sub>2</sub>O<sub>3</sub> and CeO<sub>2</sub> phases with partial mixing. Both Fe<sub>2</sub>O<sub>3</sub> phase and CeO<sub>2</sub> phase show redox during sequential TPR (temperature-programmed reduction)-CO<sub>2</sub>-TPRx (temperature-programmed reaction) up to 700 °C. The evolved Fe<sup>0</sup> after TPR appears to be the main active phase for CO<sub>2</sub> deoxygenation which becomes oxidized back to Fe<sub>2</sub>O<sub>3</sub> after CO<sub>2</sub>-TPRx. The results indicate that the interface (interphase) between Fe-domain and CeO<sub>2</sub>-domain is involved leading to the observed deoxygenation reactivity. That the stripped oxygen from CO<sub>2</sub> over Fe-domain can spillover to CeO<sub>2</sub> domain is considered as a possible explanation. We perform isothermal CO<sub>2</sub> deoxygenation test at 600 °C over TPR-treated Fe-CeO<sub>2</sub> using oxygen-conducting membrane reactor, and the CO<sub>2</sub> deoxygenation capacity is found significantly higher than that observed when in the absence of oxygen conducting membrane. This demonstrates not only the possible oxygen spillover but also the possibility of achieving a sustainable CO<sub>2</sub> deoxygenation process.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103074"},"PeriodicalIF":7.2,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cu single atoms supported on crystalline graphdiyne porphyrin analogs with dual active sites for enhanced C2 product formation
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-25 DOI: 10.1016/j.jcou.2025.103067
Zubair Masaud , Kim R. Gustavsen , Hao Huang , Andy M. Booth , Lars Eric Roseng , Kaiying Wang
{"title":"Cu single atoms supported on crystalline graphdiyne porphyrin analogs with dual active sites for enhanced C2 product formation","authors":"Zubair Masaud ,&nbsp;Kim R. Gustavsen ,&nbsp;Hao Huang ,&nbsp;Andy M. Booth ,&nbsp;Lars Eric Roseng ,&nbsp;Kaiying Wang","doi":"10.1016/j.jcou.2025.103067","DOIUrl":"10.1016/j.jcou.2025.103067","url":null,"abstract":"<div><div>Developing advanced catalysts for efficient electrochemical CO<sub>2</sub> reduction has long been a sought-after objective, but designing catalysts with open porous structures, metal sites, high atom utilization, nanoporosity, and electrical conductivity, remains challenging. Downsizing metal sites to single atoms and supporting them on conductive Covalent Organic Frameworks (COFs) offers a strategic solution to these challenges. Herein, we report a novel catalyst with a combination of copper single-atom sites supported by a highly crystalline graphdiyne porphyrin analog (Cu-SGPA). Computational analysis reveals the presence of 2.34 nm open pores with conducting π-conjugated graphdiyne linkages. The joint action of the dual active sites of Cu single atoms and the adjacent carbon atoms facilitates carbon product formation through uniquely achieved intermediate species. Cu-SGPA demonstrates a remarkable faradaic efficiency (FE) of 70 % at optimized potentials of −1.0 V vs RHE, with over 45 % FE for C<sub>2</sub> products, surpassing FE for single-atom catalysts supported on COFs. This study introduces a promising catalyst design that will inspire future efforts in developing and optimizing similar single-atom catalysts supported on conductive COFs for enhanced CO<sub>2</sub> utilization.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103067"},"PeriodicalIF":7.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advances in the development of innovative Bi-Sn-Sb-based Gas Diffusion Electrodes for continuous CO2 electroreduction to formate
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-25 DOI: 10.1016/j.jcou.2025.103070
Guillermo Díaz-Sainz , Kevin Fernández-Caso , Beatriz Ávila-Bolívar , Vicente Montiel , José Solla-Gullón , Manuel Alvarez-Guerra , Angel Irabien
{"title":"Advances in the development of innovative Bi-Sn-Sb-based Gas Diffusion Electrodes for continuous CO2 electroreduction to formate","authors":"Guillermo Díaz-Sainz ,&nbsp;Kevin Fernández-Caso ,&nbsp;Beatriz Ávila-Bolívar ,&nbsp;Vicente Montiel ,&nbsp;José Solla-Gullón ,&nbsp;Manuel Alvarez-Guerra ,&nbsp;Angel Irabien","doi":"10.1016/j.jcou.2025.103070","DOIUrl":"10.1016/j.jcou.2025.103070","url":null,"abstract":"<div><div>The electrocatalytic reduction of CO<sub>2</sub> to formate or formic acid represents a promising approach to mitigating CO<sub>2</sub> emissions. Despite progress with Bi and Sn-based cathodes, there remains a demand for new electrocatalytic materials with enhanced activity for industrial-scale implementation. In a recent contribution, carbon-supported Bi-Sn-Sb nanoparticles with different atomic ratios were prepared and evaluated for the electrocatalytic reduction of CO<sub>2</sub> to formate, assessing their performance in terms of activity, selectivity, and stability under working conditions in an H-type cell. Under this electrochemical reactor configuration, the results clearly indicated that the incorporation of small amounts of Sb and Sn into Bi significantly enhanced stability without substantially affecting activity and selectivity, achieving promising results with Bi<sub>80</sub>Sn<sub>10</sub>Sb<sub>10</sub> electrocatalysts. Here, we report the use of Bi-Sn-Sb-based Gas Diffusion Electrodes (GDEs) in a flow electrochemical reactor for the electrocatalytic reduction of CO<sub>2</sub> to formate. The study also aims to rigorously compare the performance of Bi-Sn-Sb GDEs with that of analogous GDEs based solely on Bi or Sn. When compared to relevant references, the Bi-Sn-Sb catalyst demonstrates performance metrics that reflect comparable system efficiency to the Bi and Sn cathodes previously used by our research group, operating at current densities up to 200 mA·cm<sup>−2</sup> and achieving formate concentrations of approximately 15 g·L<sup>−1</sup>. Furthermore, these materials exhibited technical feasibility, remaining stable throughout the 5-hour experiment with less than a 10 % decrease in concentration. This stability marks a vital first step toward the future implementation of this type of cathode in the electrochemical reduction of CO₂ to formate.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103070"},"PeriodicalIF":7.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143695976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Ga doping on the catalytic performance of Zn-ZSM-5 for CO2-assisted oxidative dehydrogenation of C2H6
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-22 DOI: 10.1016/j.jcou.2025.103066
Haojue Wen , Xinru Han , Lina Zhang , Yongdong Chen , Wei Wei , Nannan Sun
{"title":"Effect of Ga doping on the catalytic performance of Zn-ZSM-5 for CO2-assisted oxidative dehydrogenation of C2H6","authors":"Haojue Wen ,&nbsp;Xinru Han ,&nbsp;Lina Zhang ,&nbsp;Yongdong Chen ,&nbsp;Wei Wei ,&nbsp;Nannan Sun","doi":"10.1016/j.jcou.2025.103066","DOIUrl":"10.1016/j.jcou.2025.103066","url":null,"abstract":"<div><div>Using a low silica-to-alumina ratio NaZSM-5 zeolite as the support, a bimetallic modified catalyst, Ga<sub>x</sub>ZnZ5, was prepared through ion-exchange method for CO<sub>2</sub>-mediated oxidative dehydrogenation of C<sub>2</sub>H<sub>6</sub> (CO<sub>2</sub>-ODH). Based on systematic characterization and evaluation, it was found that Zn is the primary active component in the catalytic system for activating C<sub>2</sub>H<sub>6</sub>, but it is merely active towards CO<sub>2</sub>, leading to rapid catalyst deactivation. Under the influence of Ga species, CO<sub>2</sub> can readily engage into the reaction network. During the initial stage of the reaction, the activated CO<sub>2</sub> primarily participants in dry reforming with C<sub>2</sub>H<sub>6-x</sub> species that rapidly formed on highly active Zn sites. However, the rapid cleavage of C-H bonds on these Zn sites leads to significant carbon deposition and subsequent deactivation. Following this rapid deactivation phase, CO<sub>2</sub> becomes involved in the reaction through the reverse water-gas shift (RWGS) reaction and carbon elimination reactions, thereby shifting the reaction equilibrium towards C<sub>2</sub>H<sub>4</sub> formation while alleviating the accumulation of carbon deposition and thus enhancing stability. With the optimum catalyst (Ga<sub>0.27</sub>ZnZ5), excellent and stable performance with 22.64 % C<sub>2</sub>H<sub>4</sub> yield and nearly 100 % selectivity could be achieved after an induction period of ca. 100 minutes, these are among the highest values reported so far.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103066"},"PeriodicalIF":7.2,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of promoters on the syngas production in the microwave-enhanced methane dry reforming over Ni-x/AC (x = Mg, Ca, La, Ce) catalysts
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-19 DOI: 10.1016/j.jcou.2025.103064
Miaomiao Zhang, Yibo Gao, Wenlong Wang, Zhanlong Song, Yanpeng Mao
{"title":"Effect of promoters on the syngas production in the microwave-enhanced methane dry reforming over Ni-x/AC (x = Mg, Ca, La, Ce) catalysts","authors":"Miaomiao Zhang,&nbsp;Yibo Gao,&nbsp;Wenlong Wang,&nbsp;Zhanlong Song,&nbsp;Yanpeng Mao","doi":"10.1016/j.jcou.2025.103064","DOIUrl":"10.1016/j.jcou.2025.103064","url":null,"abstract":"<div><div>Capitalizing on the targeted energy transfer, microwave-enhanced dry reforming of methane (MW-DRM) is an attractive CO<sub>2</sub> valorization technology. However, this process coupled with carbon-based catalysts may suffer from rapid deactivation due to severe carbon deposition/loss or active metal sintering. In this study, activated carbon (AC)-supported Ni catalysts modified with different promoters (Mg, Ca, La, Ce) were investigated for MW-DRM process. As proved by the experiment results, Ca-promoted catalyst exhibited the worst reforming activity and stability in the MW-DRM and conventional heating DRM (CH-DRM) processes due to the severe carbon gasification of AC support and the severe sintering of the active metal. Compared to Mg, Ca, and La promoters, Ni-Ce/AC catalyst was demonstrated the optimum catalyst for MW-DRM process, which showed the most excellent stability with good reforming activity over 96 % and 98 % for CH<sub>4</sub> and CO<sub>2</sub> conversion rates, respectively. By converting MW energy attenuation into heat and plasma, the locally-formed high-energy active sites composed of adjacent Ni, CeO<sub>2</sub> and AC support of the Ni-Ce/AC catalyst could contribute to achieving the effective and localized activation of CH<sub>4</sub> and CO<sub>2</sub> molecules, thus leading to the enhancement of the reforming activity and the reduction of the loss of AC support due to CO<sub>2</sub> gasification. Moreover, MW heating method could avoid the excessive consumption of the AC support in Ni-Ce/AC by increasing the graphitization degree of AC, thus prolonging the lifetime of the AC-based catalysts. Above all, these findings provide new insights for the synergistic effect of MW with AC-based catalysts for syngas production.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103064"},"PeriodicalIF":7.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHB-HV) impregnated with mango leaves extracts using supercritical solvent impregnation
IF 7.2 2区 工程技术
Journal of CO2 Utilization Pub Date : 2025-03-18 DOI: 10.1016/j.jcou.2025.103062
Ludisbel León-Marcos, Antonio Montes, Diego Valor, Ignacio García-Casas, Noelia D. Machado, Clara Pereyra
{"title":"Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHB-HV) impregnated with mango leaves extracts using supercritical solvent impregnation","authors":"Ludisbel León-Marcos,&nbsp;Antonio Montes,&nbsp;Diego Valor,&nbsp;Ignacio García-Casas,&nbsp;Noelia D. Machado,&nbsp;Clara Pereyra","doi":"10.1016/j.jcou.2025.103062","DOIUrl":"10.1016/j.jcou.2025.103062","url":null,"abstract":"<div><div>The impregnation of the polymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHB-HV) with mango leaves extract (MLE) was carried out using the Supercritical Solvent Impregnation method. The impregnation loads, antioxidant compounds and physical properties of impregnated polymers were investigated with the variation of operating parameters (temperature (35 and 55 °C), pressure (10, 20 and 30 MPa) and depressurization rate (0.1 and 5 MPa/min)). Furthermore, the influence of varying impregnation times (1, 3, 6, 10, 24 h) with 30 MPa, 35 °C and 5 MPa/min was also investigated and the antimicrobial capacity (AC) was determined. The results showed a decrease of the impregnation loads, antioxidant and antimicrobial capacities with increasing impregnation time. At 30 MPa, 35 ºC and 5 MPa/min with an impregnation time of 1 h, impregnation loads and antioxidant capacities of 2.82 ± 0.04 mg MLE/100 mg PHB-HV and 2.77 ± 0.10 mg AC/100 mg PHB-HV, respectively, and a growth inhibition percentage against <em>Staphylococcus aureus</em> and <em>Escherichia coli</em> bacteria greater than 60 % were obtained.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"95 ","pages":"Article 103062"},"PeriodicalIF":7.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信