Journal of CO2 Utilization最新文献

Cu/ZnO catalysts integrated with Al2O3 and/or SiO2 for methanol synthesis: Deciphering the additive-induced boost in catalytic performance by XAFS Cu/ZnO催化剂与Al2O3和/或SiO2集成用于甲醇合成：用XAFS分析添加剂诱导的催化性能提升

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-14 DOI: 10.1016/j.jcou.2025.103111

Kosei Iwasaki , Yuya Ashida , Daiju Matsumura , Kotaro Kawakami , Kana Shibuya , Masaru Tazawa , Takuya Tsuji , Hajime Shimizu

{"title":"Cu/ZnO catalysts integrated with Al2O3 and/or SiO2 for methanol synthesis: Deciphering the additive-induced boost in catalytic performance by XAFS","authors":"Kosei Iwasaki , Yuya Ashida , Daiju Matsumura , Kotaro Kawakami , Kana Shibuya , Masaru Tazawa , Takuya Tsuji , Hajime Shimizu","doi":"10.1016/j.jcou.2025.103111","DOIUrl":"10.1016/j.jcou.2025.103111","url":null,"abstract":"<div><div>The development of active, long-lived methanol synthesis catalysts can be expedited by thoroughly understanding the operating mechanisms of promoter additives. SiO<sub>2</sub> serves as an effective support and promoter for Cu/ZnO-type methanol synthesis catalysts; however, it has not been studied as extensively as the industrially predominant Al<sub>2</sub>O<sub>3</sub>, despite being similarly potent. Therefore, we conducted X-ray absorption fine structure studies to probe the effects of incorporating Al<sub>2</sub>O<sub>3</sub> and SiO<sub>2</sub> additives into Cu/ZnO-based heterogeneous catalysts. The results revealed that the additive elements primarily affected the ability of the Zn species to generate oxygen vacancies by distorting the local structure around element-doped ZnO and that the number of oxygen vacancies correlated to the catalytic activity. Additionally, the oxygen vacancies in ZnO in the Al/Si-incorporated catalysts diminished under catalytic reaction conditions, thereby providing information on the deactivation of catalytic reactions. Our findings can facilitate the development of highly active industrial-grade methanol synthesis catalysts.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"97 ","pages":"Article 103111"},"PeriodicalIF":7.2,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polyurethane foam lightweight concrete: Preparation, CO2 fixation properties and mechanism 聚氨酯泡沫轻质混凝土的制备、CO2固定性能及机理

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-13 DOI: 10.1016/j.jcou.2025.103109

Ping Jiang, Fuping Wang, Na Li, Wei Wang, Baozhong Wang, Pengfei Yu

{"title":"Polyurethane foam lightweight concrete: Preparation, CO2 fixation properties and mechanism","authors":"Ping Jiang, Fuping Wang, Na Li, Wei Wang, Baozhong Wang, Pengfei Yu","doi":"10.1016/j.jcou.2025.103109","DOIUrl":"10.1016/j.jcou.2025.103109","url":null,"abstract":"<div><div>To enhance the carbon sequestration of concrete and the mechanical properties of polyurethane foam concrete (PFC), a novel formulation was developed using ordinary Portland cement, basalt stone powder, diphenylmethane diisocyanate, and polyether polyol. This study investigated the optimized production of PFC and its CO<sub>2</sub> capture efficiency. The optimal polyurethane crosslinking was achieved with a specific diphenylmethane diisocyanate (MDI) to polyether polyol (PP) ratio, resulting in PFC with ideal densities for structural applications. Comprehensive testing after a curing period of 48 hours yielded a maximum compressive strength of 9.16 MPa and an improved flexural strength of 4.3 MPa, demonstrating the formulation's effectiveness. Thermogravimetric analysis highlighted the CO<sub>2</sub> absorption capacities of PFC at various densities. Furthermore, an accelerated carbonization study revealed significant depth increases within the initial 8 hours. Microstructural analysis confirmed that lower-density PFC samples exhibited enhanced carbonization, with notable increases in CaCO<sub>3</sub> content, suggesting improved carbon sequestration potential. These findings indicate that the tailored PFC formulation not only strengthens material properties but also contributes to environmental sustainability by effectively capturing CO<sub>2</sub>.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"97 ","pages":"Article 103109"},"PeriodicalIF":7.2,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel gravimetric method for characterization of nanoporous materials using CO₂ 一种用二氧化碳表征纳米多孔材料的新型重量法

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-13 DOI: 10.1016/j.jcou.2025.103117

Omer Salim, Sagar Hussain Sabuz, Mohammad Piri

{"title":"A novel gravimetric method for characterization of nanoporous materials using CO₂","authors":"Omer Salim, Sagar Hussain Sabuz, Mohammad Piri","doi":"10.1016/j.jcou.2025.103117","DOIUrl":"10.1016/j.jcou.2025.103117","url":null,"abstract":"<div><div>Nanoporous materials are widely used in applications such as gas storage, catalysis, and separation processes, where accurate characterization of pore structure is essential. This study presents a novel gravimetric method that utilizes carbon dioxide (CO₂) as a probe gas for determining surface area, pore volume, and pore size distribution. Unlike traditional nitrogen (N₂) adsorption techniques, which rely on volumetric measurements at cryogenic temperatures and are limited by low saturation pressure and larger molecular size, this method operates at near-ambient temperatures and elevated pressures, leveraging CO₂'s smaller kinetic diameter and higher adsorption energy to achieve improved pore accessibility. The adsorption data, obtained using both gravimetric and volumetric methods, were analyzed and used to calculate the characterization parameters for six samples of MCM-41 and SBA-16. These measurements were further validated through complementary characterization techniques, including high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). The results demonstrate the superior precision of the gravimetric method in capturing fine structural details and show encouraging agreement with vendor-supplied specifications. This highlights the potential of the proposed method for use in broad applications such as gas storage, energy, and environmental technologies.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"97 ","pages":"Article 103117"},"PeriodicalIF":7.2,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrodeposited copper-cuprite layers modified with rGO for light-supported conversion of CO2 to methane and ethylene 用还原氧化石墨烯修饰的电沉积铜-铜层用于光负载下二氧化碳转化为甲烷和乙烯

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-12 DOI: 10.1016/j.jcou.2025.103106

Krzysztof Mech , Patrycja Kolbusz , Andrzej Sławek , Mateusz Marzec , Edit Csapó

{"title":"Electrodeposited copper-cuprite layers modified with rGO for light-supported conversion of CO2 to methane and ethylene","authors":"Krzysztof Mech , Patrycja Kolbusz , Andrzej Sławek , Mateusz Marzec , Edit Csapó","doi":"10.1016/j.jcou.2025.103106","DOIUrl":"10.1016/j.jcou.2025.103106","url":null,"abstract":"<div><div>Cu-Cu<sub>2</sub>O-rGO composite layers were electrodeposited for the first time from alkaline copper(II) lactate-based electrolytes containing dispersed rGO flakes. The properties of electrodeposited composite materials are strongly affected by applied potentials. Obtained layers were investigated towards their catalytic activity in electro- and photoelectrochemical artificial CO<sub>2</sub>-based synthesis of hydrocarbons. The effect of applied potential on the morphology, crystallographic structure, band gap, and conduction and valence band location was investigated. The catalytic performance of the electrodeposited layers was analyzed in CO<sub>2</sub>-saturated KHCO<sub>3</sub> electrolyte under the dark and at light illumination applying different conversion potentials. The stability of the obtained layers was analysed based on XPS and XAS results. Maximal Faradaic efficiencies for methane and ethylene formation were achieved in the presence of light and amounted to 10 and 9.91%, respectively. Reported results indicate that the presence of rGO in deposited layers significantly affects the band structure of electrodeposited layers. It was also observed that even slight modification of electrodeposition or conversion potential results in noticeable differences in Faradaic efficiency corresponding to hydrocarbons formation.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"97 ","pages":"Article 103106"},"PeriodicalIF":7.2,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of surface-treated silica nanofluid on supercritical CO2 injection efficiency: Application to deep saline aquifers 表面处理二氧化硅纳米流体对超临界CO2注入效率的影响：在深层盐水含水层中的应用

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-12 DOI: 10.1016/j.jcou.2025.103103

Seokgu Gang , Ingu Kang , Jeonghwan Lee , Jongwon Jung

{"title":"Effect of surface-treated silica nanofluid on supercritical CO2 injection efficiency: Application to deep saline aquifers","authors":"Seokgu Gang , Ingu Kang , Jeonghwan Lee , Jongwon Jung","doi":"10.1016/j.jcou.2025.103103","DOIUrl":"10.1016/j.jcou.2025.103103","url":null,"abstract":"<div><div>Deep saline aquifers are well-established as highly suitable for geological carbon sequestration because of their significantly greater storage capacity than other storage layers, such as depleted gas or oil reservoirs and coal seams. The use of additives, including surfactants and nanofluids, has been identified as a promising approach to mitigate the reduction in injection and storage efficiency caused by capillary forces between immiscible fluids in porous media during carbon dioxide injection into deep saline aquifers. This study analyzed the interfacial tension and wettability (contact angle) characteristics of carbon dioxide in the presence of nanofluids containing surface-treated SiO<sub>2</sub>-based nanoparticles. The injection characteristics were also evaluated through experimental and numerical methods using micromodels and pore network modeling. The results indicate that nanofluids effectively reduce interfacial tension and enhance wettability. Injection efficiency increased as the nanofluid concentration increased from 0 wt% to 1 wt% under low supercritical CO<sub>2</sub> injection velocity conditions, with a slight upward trend observed at higher concentrations. Sensitivity analysis conducted via pore network modeling revealed that the injection efficiency was more significantly influenced by interfacial tension than by wettability. Furthermore, the injection efficiency improvements observed in the numerical models were closely aligned with the trends observed in the micromodel experiments. These results demonstrate that the surface-treated SiO<sub>2</sub> based nanofluids used in this study can significantly enhance the injection efficiency of geological carbon sequestration.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"97 ","pages":"Article 103103"},"PeriodicalIF":7.2,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production costs and greenhouse gas mitigation potential of hydrogen-enhanced biomethane and bio-SNG production 氢增强生物甲烷和生物制煤天然气生产的生产成本和温室气体减排潜力

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-09 DOI: 10.1016/j.jcou.2025.103105

Frank Radosits , Alexander Bartik , Amela Ajanovic , Stefan Müller

引用次数: 0

CO2 as an alternative carbon source for ethanol production: A simulation-based technical and environmental analysis 二氧化碳作为乙醇生产的替代碳源：基于模拟的技术和环境分析

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-08 DOI: 10.1016/j.jcou.2025.103108

Mohamad Kanso, Carlos Eduardo Robles-Rodriguez, Ligia Tiruta-Barna

{"title":"CO2 as an alternative carbon source for ethanol production: A simulation-based technical and environmental analysis","authors":"Mohamad Kanso, Carlos Eduardo Robles-Rodriguez, Ligia Tiruta-Barna","doi":"10.1016/j.jcou.2025.103108","DOIUrl":"10.1016/j.jcou.2025.103108","url":null,"abstract":"<div><div>Three ethanol production scenarios from CO<sub>2</sub> are analyzed: (S1) syngas catalytic conversion; (S2) syngas fermentation; and (S3) bio-conversion of CO₂ with H₂. These three scenarios were simulated in ProSimPlus® software, using flue gas from cement production and biogas as CO<sub>2</sub> sources. Technological performance and environmental impacts evaluated through the Life Cycle Assessment (LCA) method were analyzed. Chemical absorption (CA) and membrane separation (MS) are utilized for carbon capture, while hydrogen is generated by electrolysis. When considering flue gas and CA, scenario S1_CA yielded the lowest ethanol production (0.110 kg/kg-CO<sub>2</sub>) but the highest energy consumption: 130 MJ electricity/kg-ethanol and 73 MJ heat/kg ethanol. Contrarily, S3_CA achieved the highest ethanol production (0.345 kg/kg-CO<sub>2</sub>) with energy consumption comparable to S2 (86 MJ electricity/kg-ethanol and 20 MJ heat/kg-ethanol). S1 demonstrated the lowest global warming impact (GWP100) with values of –8.60 kg CO₂-eq per kg ethanol for CA (S1_CA) and –10.13 kg CO₂-eq for MS (S1_MS). S1 outperformed both S2 (CA: 0.13 kg CO₂-eq, MS: –0.83 kg CO₂-eq) and S3 (CA: –0.43 kg CO₂-eq, MS: –1.00 kg CO₂-eq). When biogas was used, S3_CA exhibited the lowest impact: 3.00 kg CO₂-eq, compared to S2_CA: 6.36 kg CO₂-eq and S1_CA: 4.10 kg CO₂-eq. S1_MS and S3_MS have close results: 2.34 and 2.44 kg CO₂-eq, respectively, much lower than S2_MS (5.22 kg CO₂-eq). When considering the end-of-life with ethanol combustion, GWP100 results of flue gas-based scenarios become similar (S1) or worse (S2, S3) than current crop/vegetable fermentation production routes, while biogas-based scenarios strongly depend on fugitive emissions control.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"96 ","pages":"Article 103108"},"PeriodicalIF":7.2,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploitation of seawater brines for the production of Nesquehonite solids and CO2 utilization 利用海水卤水生产Nesquehonite固体和二氧化碳利用

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-05 DOI: 10.1016/j.jcou.2025.103101

Giuseppe Battaglia, Michela Cardella, Alessandro Tamburini, Andrea Cipollina, Giorgio Micale

{"title":"Exploitation of seawater brines for the production of Nesquehonite solids and CO2 utilization","authors":"Giuseppe Battaglia, Michela Cardella, Alessandro Tamburini, Andrea Cipollina, Giorgio Micale","doi":"10.1016/j.jcou.2025.103101","DOIUrl":"10.1016/j.jcou.2025.103101","url":null,"abstract":"<div><div>The simultaneous utilization of waste CO<sub>2</sub> streams and bivalent rich saline solutions is a crucial opportunity to face climate change challenges. Several authors have investigated desalination seawater brines as promising sources of bivalent solutions for CO<sub>2</sub> utilization technologies. However, the Mg<sup>2 +</sup> and Ca<sup>2+</sup> content in brines affects the purity of the synthesized compounds. In this context, the present work thoroughly assesses, for the first time, the direct and indirect mineral carbonation processes of real highly concentrated Mg<sup>2+</sup>-rich saline solutions (bitterns), the latter being the by-products of the evaporation process of seawater or desalination brines in saltworks or evaporative ponds. For comparison, the indirect carbonation process of real desalination brines was also explored. The bittern had Mg<sup>2+</sup> and Ca<sup>2+</sup> concentrations of ∼2.00 mol/L and ∼0.004 mol/L, while ∼0.13 mol/L and ∼0.025 mol/L were those in the desalination brine, respectively. Carbonation tests were conducted at room temperature and atmospheric pressure in a (semi-)batch reactor. The high concentration of Mg<sup>2+</sup> and the almost absence of Ca<sup>2+</sup> in the bittern allowed (i) the production of highly pure Nesquehonite solids (purity ∼99 %) and (ii) almost doubling the CO<sub>2</sub> yield (from 23 % to 37 %) through the direct carbonation approach against the indirect one.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"96 ","pages":"Article 103101"},"PeriodicalIF":7.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of photoactive carbon nitride and titanium dioxide features on HKUST-1 depositions and catalytic consequences during CO2 conversion in water 光活性氮化碳和二氧化钛特性对HKUST-1沉积的影响及其在水中CO2转化的催化效果

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-05 DOI: 10.1016/j.jcou.2025.103098

P.R. Nimax, S. Vaquero-Vílchez, C. Múgica, H. Gomez, I. Agirrezabal-Telleria

{"title":"Effect of photoactive carbon nitride and titanium dioxide features on HKUST-1 depositions and catalytic consequences during CO2 conversion in water","authors":"P.R. Nimax, S. Vaquero-Vílchez, C. Múgica, H. Gomez, I. Agirrezabal-Telleria","doi":"10.1016/j.jcou.2025.103098","DOIUrl":"10.1016/j.jcou.2025.103098","url":null,"abstract":"<div><div>“CO<sub>2</sub> storage is one of the biggest challenges in controlling climate change. It can either be stored permanently or recycled into chemicals for which photoreduction of CO<sub>2</sub> is a promising method by providing a way to enable conversion into high value chemicals with sunlight. Photoactive supports, such as carbon nitride or titanium dioxide catalyze this conversion and mesoporous materials can enhance substrate uptake by increasing surface area and adsorption. Metal-organic frameworks (MOF) deposition on such materials enables to increase substrate specificity and direct conversion into desired products. Since MOFs are affected by environmental factors, such as pH, temperature or co-ligands during their formation and interaction, structural differences in photoactive support will impact behavior and affect productivity of acetaldehyde and ethanol from CO<sub>2</sub> and water within HKUST-1@support heterojunctions. This investigation compares morphological and photocatalytic effects of growing HKUST-1 on graphitic carbon nitride, mesoporous carbon nitride and TiO<sub>2</sub>. By adding MOF layers in a stepwise process, we investigate surface binding and interaction on each support in photoreduction of CO<sub>2</sub> in a closed batch system under room temperature. Such methods allow us to study the effect of support-interactions on MOF growth and cross-reference to the observed photocatalytic activity. This leads to a shift towards ethanol productivity with selectivity of up to 63 % compared to acetaldehyde in the support itself, directing production towards specific products by adding MOF on photoactive support.”</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"96 ","pages":"Article 103098"},"PeriodicalIF":7.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning Ru/Ni sites in the perovskite-based precursor synthesis to make more efficient and durable dual-function materials for integrated CO2 capture and methanation 调整钙钛矿基前驱体合成中的Ru/Ni位点，制备更高效、耐用的双功能材料，用于二氧化碳捕获和甲烷化

IF 7.2 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-05-05 DOI: 10.1016/j.jcou.2025.103104

Jon A. Onrubia-Calvo, Beñat Pereda-Ayo, Unai De-La-Torre, José A. González-Marcos, Juan R. González-Velasco

{"title":"Tuning Ru/Ni sites in the perovskite-based precursor synthesis to make more efficient and durable dual-function materials for integrated CO2 capture and methanation","authors":"Jon A. Onrubia-Calvo, Beñat Pereda-Ayo, Unai De-La-Torre, José A. González-Marcos, Juan R. González-Velasco","doi":"10.1016/j.jcou.2025.103104","DOIUrl":"10.1016/j.jcou.2025.103104","url":null,"abstract":"<div><div>A new generation of Dual Function Materials (DFMs) were obtained after the controlled reduction of 20 % La<sub>0.6</sub>Ca<sub>0.4</sub>Ni<sub>0.95</sub>Ru<sub>0.05</sub>O<sub>3</sub>/CeO<sub>2</sub> synthesized combining citric acid-wetness impregnation methods. Different parameters such as pH of the starting solution, calcination protocol were modified in order to synthesize materials with variable nanostructure, surface chemistry and textural properties, thereby effectively tuning the material activity and stability for the integrated CO<sub>2</sub> adsorption and in situ methanation operation. The samples were extensively characterized before and after catalytic tests by XRD, Raman, STEM-EDS, XPS, N<sub>2</sub> adsorption-desorption, H<sub>2</sub>-TPR, H<sub>2</sub>-TPD, CO<sub>2</sub>-TPD, and H<sub>2</sub>-TPSR. It was found that the DFM obtained from the precursor prepared in absence of NH<sub>3</sub> promoted Ru accommodation within the perovskite structure. The corresponding DFM showed enhanced textural properties, Ru/Ni actives sites accessibility and weak/medium basic sites concentration and, consequently, displayed the highest CH<sub>4</sub> yield (312 µmol g<sup>−1</sup>) and fastest CH<sub>4</sub> production kinetics under cycles of CO<sub>2</sub> adsorption and in situ hydrogenation to CH<sub>4</sub>. Furthermore, this sample showed higher stability than conventional Ru-based DFMs, with CH<sub>4</sub> production decreasing by less than 6 % compared to 25 % observed for conventional ones, due to a lower tendency for metal sintering, emerging as a promising alternative for long-term operation under realistic industrial conditions.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"96 ","pages":"Article 103104"},"PeriodicalIF":7.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0