Journal of CO2 Utilization最新文献_第10页

Hydrogen bond-stabilized mixtures for efficient carbon dioxide capture 氢键稳定混合物，有效捕获二氧化碳

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-10-17 DOI: 10.1016/j.jcou.2025.103249

Joaquín Arata Badano , Giuseppe Ferraro , Daniele Motta , Claudia Barolo , Sergio Bocchini , Jorge Gustavo Uranga , Matteo Bonomo

{"title":"Hydrogen bond-stabilized mixtures for efficient carbon dioxide capture","authors":"Joaquín Arata Badano , Giuseppe Ferraro , Daniele Motta , Claudia Barolo , Sergio Bocchini , Jorge Gustavo Uranga , Matteo Bonomo","doi":"10.1016/j.jcou.2025.103249","DOIUrl":"10.1016/j.jcou.2025.103249","url":null,"abstract":"<div><div>In this study, we investigate the use of hydrogen bond-stabilized amine-based mixtures (a class of systems hereafter referred to as Hydrogen Bond-Stabilized Mixtures, HBSMs; e.g., n-butylamine with glycerol or guanidinium chloride) as an alternative approach to improve carbon dioxide capture efficiency while avoiding massive solvent evaporation. CO<sub>2</sub> capture experiments reveal that these mixtures exhibit improved sorption capacity compared to pure amines, while the presence of hydrogen bond acceptors plays a crucial role in stabilizing the systems, due to the establishment of an extended hydrogen-bond network. ATR-IR analyses confirm that CO<sub>2</sub> capture occurs through a combination of physical and chemical absorption; on the other hand, TGA data reveal a substantial reduction in solvent evaporation rates, particularly in the n-butylamine/glycerol mixture, where evaporation decreased by more than an order of magnitude compared to pure amine. The high CO<sub>2</sub> absorption capacity and reduced amine volatility of these mixtures open a promising avenue for more sustainable and energy-efficient carbon capture technologies, paving the way for relevant industrial applications.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103249"},"PeriodicalIF":8.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145321282","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

Impact of fluctuating temperature and pressure of injected CO2 on adsorption performance in a packed-bed reactor: A CFD-based study 注入二氧化碳的温度和压力波动对填充床反应器吸附性能的影响：基于cfd的研究

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-10-29 DOI: 10.1016/j.jcou.2025.103253

Ali M. Sefidan, Jari Vepsäläinen

{"title":"Impact of fluctuating temperature and pressure of injected CO2 on adsorption performance in a packed-bed reactor: A CFD-based study","authors":"Ali M. Sefidan, Jari Vepsäläinen","doi":"10.1016/j.jcou.2025.103253","DOIUrl":"10.1016/j.jcou.2025.103253","url":null,"abstract":"<div><div>This study investigates the influence of oscillatory inlet conditions on CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> adsorption performance and energy efficiency in a packed-bed reactor using Computational Fluid Dynamics (CFD) modelling. Baseline operating values of 3 bar and 20 °C were selected as representative conditions, and systematic oscillations in pressure (<span><math><mrow><msub><mrow><mi>A</mi></mrow><mrow><mi>P</mi></mrow></msub><mo>=</mo><mo>±</mo><mspace></mspace><mn>0</mn><mo>.</mo><mn>2</mn></mrow></math></span> to 2 bar) and temperature (<span><math><mrow><msub><mrow><mi>A</mi></mrow><mrow><mi>T</mi></mrow></msub><mo>=</mo><mo>±</mo><mspace></mspace><mn>2</mn></mrow></math></span> to 10 °C) were imposed at frequencies of 0.001 to 0.01 Hz. Three forcing patterns – snusoidal, triangular, and step changes – were considered and compared to steady operation. The results show that pressure oscillations dominate the dynamic adsorption response: large amplitudes (<span><math><mo>±</mo></math></span>2 bar) reduce average CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> uptake by up to 16% and increase specific energy consumption by 18% relative to steady-state. Temperature oscillations alone have negligible impact under the present baseline, as symmetric forcing cancels over each cycle; however, when temperature oscillations are coupled with pressure swings, they significantly affect the cooling energy load. Among waveform types, triangular oscillations achieve the most favourable balance of adsorption performance and energy demand, while step changes lead to the poorest efficiency. Overall, the findings demonstrate that oscillatory injection conditions generally reduce adsorption performance, with pressure fluctuations exerting the strongest influence, underscoring the importance of pressure-stabilizing strategies for efficient CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> capture.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103253"},"PeriodicalIF":8.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145412419","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

Enhanced plasma-assisted CO2 methanation on Ru/CeO2 catalysts Ru/CeO2催化剂上等离子辅助CO2甲烷化的增强

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-10-14 DOI: 10.1016/j.jcou.2025.103240

Beatrice Musig , Jairo Barauna , Abhijit Roy , Raul Arenal , María Elena Gálvez , Tomás García , Ramón Murillo , María Victoria Navarro

{"title":"Enhanced plasma-assisted CO2 methanation on Ru/CeO2 catalysts","authors":"Beatrice Musig , Jairo Barauna , Abhijit Roy , Raul Arenal , María Elena Gálvez , Tomás García , Ramón Murillo , María Victoria Navarro","doi":"10.1016/j.jcou.2025.103240","DOIUrl":"10.1016/j.jcou.2025.103240","url":null,"abstract":"<div><div>Methanation process utilizes CO₂ as a carbon feedstock for synthesizing energy carriers and value-added chemicals. The combination of methanation with plasma-catalysis has emerged as a promising avenue for the electrification of power-to-gas technologies, representing a significant development in the transition to sustainable energy systems. The present study investigates the impact of low 5 % mol Ru loading on CeO<sub>2</sub>, focusing in the role of the metal in comparison to Ni and the metal-support interactions examined using CeO<sub>2</sub> with different structures (nanoneedles, nanopowder) and Ru dispersion within the support. The catalyst Ru/NN with nanoneedles of ceria achieved CO₂ conversion of 70 % and CH₄ selectivity of 99 % at 1CO₂/4H₂, WHSV of 30 L h<sup>−1</sup> g<sub>cat-1</sub>, 12 kg<sub>CO2</sub> kg<sub>cat-1</sub> h<sup>−1</sup> and plasma input power of 8.9 W. The enhanced plasma-catalytic activity of Ru/NN can be attributed to the increased effective H<sub>2</sub> dissociation, beneficial physicochemical and electrical properties attributed to the choice of support and optimal metal-support interaction. The lower dielectric capacitance calculated for this catalyst is the result of reduced charge storage and a faster response to the applied electric field. This produces less intense microdischarges and a more stable and uniform plasma environment.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103240"},"PeriodicalIF":8.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145321374","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

Metal-free conversion of CO2 to non-isocyanate polyurethane for solid amine sorbent pellets design for CO2 capture 无金属二氧化碳转化为非异氰酸酯聚氨酯固体胺吸附剂颗粒设计的二氧化碳捕获

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-09-19 DOI: 10.1016/j.jcou.2025.103228

Faranak Heshmatnia, Zahra Eshaghi Gorji, Nguyan Gia Huy, Baljeet Singh, Timo Repo

引用次数: 0

Nitrogen-rich covalent triazine frameworks as efficient supports for nickel-catalyzed CO2 conversion 富氮共价三嗪框架作为镍催化CO2转化的有效载体

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-11-27 DOI: 10.1016/j.jcou.2025.103279

Mohadeseh Rashvand , Mojtaba Khorasani

{"title":"Nitrogen-rich covalent triazine frameworks as efficient supports for nickel-catalyzed CO2 conversion","authors":"Mohadeseh Rashvand , Mojtaba Khorasani","doi":"10.1016/j.jcou.2025.103279","DOIUrl":"10.1016/j.jcou.2025.103279","url":null,"abstract":"<div><div>A nitrogen-rich covalent triazine framework (CTF) with a low carbon-to-nitrogen (C/N) molar ratio of 1.46 was synthesized as a solid nitrogen-containing ligand, offering abundant coordination sites for the immobilization of nickel(II) acetate catalyst for CO<sub>2</sub> utilization. The resulting heterogeneous Ni-CTF catalyst was thoroughly characterized by porosimetry, TGA, FTIR, Raman spectroscopy, SEM-EDAX, XPS, XRD, and CO₂ adsorption capacity analyses. Ni-CTF efficiently promoted the direct coupling of carbon dioxide with epoxides under relatively mild conditions (0.25 mol% Ni-CTF, 0.5 mol% TBAB, 7.5 bar CO₂, 100 °C). To clarify the individual roles of each catalytic component, a series of control experiments were conducted under identical conditions, including Ni-CTF alone, the pristine CTF, unsupported nickel(II) acetate, and various co-catalysts with distinct chemical properties. These systematic investigations provided deeper insight into the contributions to catalytic performance. Ni-CTF displayed excellent recyclability, retaining both activity and selectivity over at least four consecutive cycles without noticeable loss in performance. The observed catalytic performance is attributed to the organic nature of the CTF, which facilitates the diffusion of organic epoxide molecules, as well as to the nitrogen-rich functionalities embedded within the triazine network. These nitrogen sites, in conjunction with their ability to coordinate nickel species, significantly enhance the CO<sub>2</sub> adsorption capacity of the catalyst.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103279"},"PeriodicalIF":8.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145614768","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

Green and scalable approaches for synthesis and encapsulating clean metal nanoclusters inside cerium MOFs for efficient glycerol carboxylation with CO2 绿色和可扩展的方法合成和封装清洁金属纳米团簇在铈mof内有效的甘油羧化与二氧化碳

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-10-17 DOI: 10.1016/j.jcou.2025.103243

Simon Lukato , Agnieszka Krogul-Sobczak , Grzegorz Litwinienko , Ola F. Wendt , Reine Wallenberg , Filip Hallböök , Michal Wojcik

{"title":"Green and scalable approaches for synthesis and encapsulating clean metal nanoclusters inside cerium MOFs for efficient glycerol carboxylation with CO2","authors":"Simon Lukato , Agnieszka Krogul-Sobczak , Grzegorz Litwinienko , Ola F. Wendt , Reine Wallenberg , Filip Hallböök , Michal Wojcik","doi":"10.1016/j.jcou.2025.103243","DOIUrl":"10.1016/j.jcou.2025.103243","url":null,"abstract":"<div><div>In the pursuit of CO₂-neutral renewable energy solutions, biofuels have emerged as one of the key strategies. However, biodiesel production generates a surplus of crude glycerol (GL), creating a need for efficient valorization pathways. The conversion of GL into value-added chemicals represents a sustainable approach to address this issue. Metal nanoclusters (NCats) embedded within metal-organic frameworks (MOFs) constitute a promising class of hybrid catalysts for GL–CO₂ coupling, yet their controlled synthesis remains limited to a few MOF systems. Herein, we present a clean, scalable, and efficient method for the synthesis of ultra-small, surfactant-free Cu, Ag, and Pd NCats encapsulated in cerium-based MOFs. The resulting catalysts were evaluated in the direct carboxylation of crude GL with CO₂. Among them, the Pd₁Cu₁@MOF1 composite demonstrated outstanding performance, achieving > 73 % yield and a TOF > 100 h⁻¹ with pure GL, and > 14 % yield with a TOF of 30 h⁻¹ using crude GL. The method also enabled successful incorporation of trimetallic PdAgCu NCats, highlighting its potential for the sustainable synthesis of multimetallic NCats-MOF catalytic systems.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103243"},"PeriodicalIF":8.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145321281","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

Ion-bridged hydroxyapatite nanofiber bundles via supercritical CO2-mediated mesoscale nanoarchitectonic for robust hydrophobicity 离子桥接羟基磷灰石纳米纤维束通过超临界二氧化碳介导的中尺度纳米结构坚固的疏水性

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-10-28 DOI: 10.1016/j.jcou.2025.103263

Wenjing Guo , Yannan Zhou , Binbin Hu , Kanglin Feng , Xuefeng Wei , Shouren Zhang , Baocheng Yang

{"title":"Ion-bridged hydroxyapatite nanofiber bundles via supercritical CO2-mediated mesoscale nanoarchitectonic for robust hydrophobicity","authors":"Wenjing Guo , Yannan Zhou , Binbin Hu , Kanglin Feng , Xuefeng Wei , Shouren Zhang , Baocheng Yang","doi":"10.1016/j.jcou.2025.103263","DOIUrl":"10.1016/j.jcou.2025.103263","url":null,"abstract":"<div><div>Conventional hydrophobic ceramic coatings exhibit compromised mechanochemical robustness due to static templating and decoupled organic-inorganic assembly. Here we introduce a supercritical carbon dioxide (SC CO<sub>2</sub>) strategy to engineer mesoscale self-assembly—where interactive inorganic-organic building blocks couple across time and space—to enable hierarchical structured hydroxyapatite (HAP) nanofiber bundles with embedded hydrophobicity. Our findings demonstrate that SC CO<sub>2</sub> generates dynamic microcompartments and a mildly acidic environment that not only facilitate the rapid growth of HAP nanofibers with restricted <em>c</em>-axis orientation but also establish directional Ca<sup>2 +</sup> –PO<sub>4</sub><sup>3−</sup> ionic bridges that interconnect nanofibers into a cohesive inorganic network, in which oleate anions (OL<sup>−</sup>) <em>in situ</em> bind at ionic junctions via bidentate chelation, forming a robust hydrophobic layer. This green and scalable process yields advanced hydrophobic ceramic coatings, which have been successfully used to construct HAP-based fire-resistant paper with superior self-cleaning and oil-water separation capability, as well as sustainable Chinese Xuan paper with enhanced writing performance. Such mesoscale engineering, which unifies synthesis, assembly, and function, represents a new paradigm for creating robust, multifunctional biomimetic materials.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103263"},"PeriodicalIF":8.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145412413","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

Synthesis of robust S-O covalent-bonded In2S3/α-Fe2O3 nanorod arrays heterojunction with a tailored heat treatment strategy for enhanced photoelectrochemical water splitting 采用定制热处理策略合成S-O共价键In2S3/α-Fe2O3纳米棒阵列异质结，增强光电化学水分解

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-10-28 DOI: 10.1016/j.jcou.2025.103260

Ai-zhen Liao , Qing-hua Xie , Lin-ji Zhang , Wei Ren , Yong Wang , Chao Yang , Xiao-hong Jiang , Yong Zhou , Zhi-gang Zou

{"title":"Synthesis of robust S-O covalent-bonded In2S3/α-Fe2O3 nanorod arrays heterojunction with a tailored heat treatment strategy for enhanced photoelectrochemical water splitting","authors":"Ai-zhen Liao , Qing-hua Xie , Lin-ji Zhang , Wei Ren , Yong Wang , Chao Yang , Xiao-hong Jiang , Yong Zhou , Zhi-gang Zou","doi":"10.1016/j.jcou.2025.103260","DOIUrl":"10.1016/j.jcou.2025.103260","url":null,"abstract":"<div><div>A robust S-O covalent-bonded In<sub>2</sub>S<sub>3</sub>/α-Fe<sub>2</sub>O<sub>3</sub> nanorod arrays heterojunction were successfully synthesized via a modified heat treatment strategy. The resulting photoanode exhibits an exceptional photocurrent density of 2.65 mA cm<sup>−2</sup> at 1.23 V vs. RHE, achieving a 235 % enhancement compared to robust bare α-Fe<sub>2</sub>O<sub>3</sub> (1.13 mA cm<sup>−2</sup> at 1.23 V vs. RHE). To our knowledge, this represents the highest photocurrent density among all reported In<sub>2</sub>S<sub>3</sub>/α-Fe<sub>2</sub>O<sub>3</sub> systems. Moreover, the photoanode demonstrates excellent stability, maintaining over 95 % of its initial performance over 3 h in alkaline electrolyte. The outstanding PEC performances of robust S-O bonded In<sub>2</sub>S<sub>3</sub>/α-Fe<sub>2</sub>O<sub>3</sub> photoanode originates from a synergistic effect of the following aspects: (i) Locking the morphology of FeOOH nanorod array precursor through the improved thermal annealing method decreases charge-carrier recombination; (ⅰi) Forming atomic-level S-O covalent bonds provide direct charge-transfer pathways, thereby enhancing carrier lifetime and reducing interfacial resistance; (iii) Constructing a type-II heterojunction establishes a strong internal electric field that provides a large driving force for the rapid migration of photogenerated charges; and (iv) Loading In<sub>2</sub>S<sub>3</sub> efficiently passivates surface defects and promotes hole injection.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103260"},"PeriodicalIF":8.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145412412","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 catalyst performance in methane dry reforming via microwave irradiation of Nickel-Silicon carbide systems 微波辐照镍-碳化硅体系对甲烷干重整催化剂性能的调整

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-11-05 DOI: 10.1016/j.jcou.2025.103270

Christel Olivier Lenge Mbuya , Kunal Pawar , Mitra Jafari , Parisa Shafiee , Chike George Okoye Chine , Pilar Tarifa , Bogdan Dorneanu , Harvey Arellano-Garcia

{"title":"Tuning catalyst performance in methane dry reforming via microwave irradiation of Nickel-Silicon carbide systems","authors":"Christel Olivier Lenge Mbuya , Kunal Pawar , Mitra Jafari , Parisa Shafiee , Chike George Okoye Chine , Pilar Tarifa , Bogdan Dorneanu , Harvey Arellano-Garcia","doi":"10.1016/j.jcou.2025.103270","DOIUrl":"10.1016/j.jcou.2025.103270","url":null,"abstract":"<div><div>The dry reforming of methane (DRM) is a promising route for converting greenhouse gases such as methane (CH<sub>4</sub>) and carbon dioxide (CO<sub>2</sub>) into valuable syngas, hydrogen (H<sub>2</sub>) and carbon monoxide (CO). However, traditional nickel (Ni)-based catalysts suffer from rapid deactivation due to carbon deposition and sintering, especially when supported on low thermal conductivity materials. In this work, a novel post-synthesis microwave irradiation (MIR) treatment is introduced to systematically optimize the performance of Ni – β – SiC and Ni – Ti – Cβ – SiC catalysts for DRM. Unlike previous studies that have used MIR during reaction or with different supports, this approach tunes the metal – support interactions and textural properties of Ni – β – SiC and Ni – Ti – Cβ – SiC catalysts by varying the MIR exposure time after catalyst synthesis. MIR post-treatment (10–25 s) increased the CH<sub>4</sub> conversion to 65 % and the CO<sub>2</sub> conversions to 62 % for Ni–β–SiC catalysts and improved the H₂/CO ratio to 0.80, with stable performance over 20 h. For Ni–Ti–Cβ–SiC, MIR (10–20 s) maintained CH<sub>4</sub> conversion up to 60 % and CO<sub>2</sub> conversion to 58 % over 20 h, while the untreated catalyst, though initially higher, deactivated rapidly. Excessive MIR (30 s) reduced performance for both catalyst types, underscoring the need for optimal exposure time. These findings demonstrate post-synthesis MIR provides a tuneable approach for enhancing both the activity and durability of Ni/SiC – based DRM catalysts through controlled modification of metal – support interactions. This work offers new insights for the design of robust catalysts aimed at greenhouse gas utilization and sustainable syngas production, with activity and stability enhancements linked to controlled changes in metal – support interactions.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103270"},"PeriodicalIF":8.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145462497","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

Application of acid digestion-based total inorganic carbon measurement for carbonated cement-based materials 酸消化法测定总无机碳在碳酸水泥基材料中的应用

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-12-01 Epub Date: 2025-11-05 DOI: 10.1016/j.jcou.2025.103266

Ryo Kurihara , Luge Cheng , Ryusei Igami , Zhenzhen Wang , Abudushalamu Aili , Kiyuki Noto , Minako Tanaka , Haruka Takahashi , Ippei Maruyama

{"title":"Application of acid digestion-based total inorganic carbon measurement for carbonated cement-based materials","authors":"Ryo Kurihara , Luge Cheng , Ryusei Igami , Zhenzhen Wang , Abudushalamu Aili , Kiyuki Noto , Minako Tanaka , Haruka Takahashi , Ippei Maruyama","doi":"10.1016/j.jcou.2025.103266","DOIUrl":"10.1016/j.jcou.2025.103266","url":null,"abstract":"<div><div>There is growing societal demand for methods to quantify the amount of CO₂ immobilized in cement-based materials. In this study, we compared and evaluated multiple analytical approaches: two different interpretation methods applied to thermogravimetric analysis (TGA) data conventionally used in this field, and two techniques widely adopted in soil science and related areas. The first of these involves heating the sample to release CO₂, which is then quantified using infrared absorption spectroscopy; the second involves dissolving carbonates in the sample using acid, with the evolved CO₂ gas similarly measured using infrared absorption. In carbonated cement pastes, when silica gel and carbonates are in close contact, CO₂ may be released at relatively low temperatures. This temperature range overlaps that of organic matter decomposition, which can complicate quantitative analyses using thermal methods. However, accurate quantification is feasible in systems with minimal organic content. During acid decomposition, silica gel may interfere with carbonate dissolution. Nevertheless, if the sample is sufficiently ground, an appropriate volume of the acid solution is used, and the dissolution time is properly managed under stirring conditions, this method offers a simple and practical means for CO₂ quantification.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103266"},"PeriodicalIF":8.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145462494","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