Journal of CO2 Utilization最新文献

{"title":"Non-thermal plasma-enhanced reverse water-gas shift reaction over hydroxyapatite-supported Ni catalyst: Effect of severe process conditions","authors":"Farbod Farzi,&nbsp;Erwan Baudillon,&nbsp;Romain Kersaudy,&nbsp;Inès Esma Achouri","doi":"10.1016/j.jcou.2025.103181","DOIUrl":"10.1016/j.jcou.2025.103181","url":null,"abstract":"<div><div>CO₂ hydrogenation to carbon monoxide and water (Reverse Water Gas Shift reaction) is a promising way to valorize CO_2. It is the preliminary step in the methanol and Fischer-Tropsch synthesis processes. However, the thermodynamic barrier has limited the industrial scale-up of this process, and thus, the need for a proper catalyst formulation and reactor configuration is still ongoing. In this paper, we studied the catalytic performance of a hydroxyapatite-supported nickel-zirconia catalyst in a microwave plasma reactor for the CO₂ hydrogenation to carbon monoxide. A 10 wt% Ni- ZrO₂/HAp catalyst was prepared by the wetness impregnation method, dried at 180 ^°C for 18 h and calcined at 500^°C for 3 h. The influence of the H₂/CO₂ molar ratio, power, and GHSV on CO₂ conversion and CO selectivity was studied. In the selected range of GHSV, it did not influence the output parameters. Moreover, CO selectivity remained in the range of 98–100 % in all experiments. The highest carbon yield was 83 % under H₂/CO₂ to 2:1, Power= 2.25 kW, and GHSV= 80,000 mL.gr⁻¹.hr⁻¹ while maintaining 9 % energy efficiency. The high CO₂ conversion is justified due to the interaction of a basic catalyst with the CO₂ (weak acid) which facilitated the CO₂ reduction to CO as well as the microwave discharge reactor, whose temperature characteristics meet the requirement of the RWGS reaction. In addition, an energy efficiency equal to 28 % was observed under H₂/CO₂ to 1:1, Power= 0.8 kW, and GHSV= 120,000 mL.gr⁻¹.hr⁻¹. To the best of our knowledge, these values have never been attained before. In this study, we proposed a novel catalyst formulation for the CO₂ hydrogenation reaction, tested a microwave discharge for the reaction, and operated at very high GHSV levels, which are suitable for industrial production.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"100 ","pages":"Article 103181"},"PeriodicalIF":8.4,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723622","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}

{"title":"Deciphering the mechanism of nano-enhanced docosahexaenoic acid accumulation in microalgae","authors":"Adamu Yunusa Ugya ,&nbsp;Hui Chen ,&nbsp;Qiang Wang","doi":"10.1016/j.jcou.2025.103182","DOIUrl":"10.1016/j.jcou.2025.103182","url":null,"abstract":"<div><div>Docosahexaenoic acid (DHA) is a vital bioresource for human health due to its cardiovascular function, anti-inflammatory significance, and cognitive benefits. But the sustainability of DHA from its traditional sources is in question due to overfishing and environmental concerns. Microalgae is a sustainable alternative source of DHA; however, scale-up production of DHA from microalgae is strained due to the high cost of cultivation and extraction processes. This review provides an important insight into how nanoparticles can be used to enhance DHA biosynthesis in microalgae through targeted and efficient manipulation of cellular processes. The review shows that the manipulation of nanoscale material allows for intervention that improves the bioprospecting potential of microalgae through enhancing cultivation efficiency. Also, the mechanistic pathways through which nano-enhancement tends to upsurge DHA accumulation in microalgal systems were explored. The review indicates that nano-enhancements can be achieved through a complex mechanism that involves nanoparticles acting as growth promoters and biostimulants. Nanoparticles also enhance DHA in microalgae by triggering enhanced light utilization and plasmonic effects. Nanoparticles also play a critical role in increasing extraction efficiency and stability of DHA in microalgae, making them a promising tool for bioprospecting. But despite the significance of nanoparticles in enhancing DHA accumulation, limitations such as the high cost of nanomaterials and formulation, potential toxicity to microalgal cells, and limited understanding of nano-bio interactions hinder the achievement of scale-up application. Thus buttressing the need for further studies to address these challenges and optimize the use of nanoparticles in microalgae cultivation.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"100 ","pages":"Article 103182"},"PeriodicalIF":7.2,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704700","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}

{"title":"Revisit of Thiele’s acid synthesis from CO2 and cyclopentadiene and use for TCD-amine preparation with all-endo specific stereochemistry","authors":"Fu-En Szu ,&nbsp;Chen-Wei Yang ,&nbsp;Yi-Zhen Li ,&nbsp;Yin-Yin Yu ,&nbsp;Chun-I Huang ,&nbsp;Jia-Hong Chen ,&nbsp;Jui-Hsiung Huang ,&nbsp;Man-kit Leung","doi":"10.1016/j.jcou.2025.103177","DOIUrl":"10.1016/j.jcou.2025.103177","url":null,"abstract":"<div><div>This study provides a mild procedure using CO₂, cyclopentadiene, and sodium <em>tert</em>-butoxide for <strong>Thiele’s acid</strong> in good yields and high purity. The product distribution of <strong>Thiele's acid</strong> and other isomeric forms can be tuned by utilizing different metal cations. Among the bases we have tried, sodium <em>tert</em>-butoxide can selectively provide <strong>Thiele’s acid</strong> as the major product in 72 % isolated yield, along with an <em>endo</em>, <em>endo</em>-pentacyclopentadecadienetricarboxylic acid, denoted as <strong>PCPD-triacid</strong> as the side product. <strong>Thiele’s acid</strong> and <strong>PCPD-triacid</strong> can be hydrogenated in aqueous alkaline solution to give the corresponding all-<em>endo</em> tetrahydro-derivatives, denoted as <strong>THDCPD-diacid</strong> and <strong>THPCPD-triacid</strong>. Functional group transformation of the carboxylic acids to alcohols and amines, such as <strong>THDCPD-diol</strong> and <strong>THDCPD-diamine</strong>, has been successfully demonstrated. Their chemical structures and stereochemistry are confirmed by X-ray crystallographic analysis. <strong>THDCPD-diamine</strong> is stereochemically complementary to the commercially available TCD-diamine with high purity and can serve as versatile polymer monomers or cross-linking agents, significantly expanding their potential for use in various applications.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"100 ","pages":"Article 103177"},"PeriodicalIF":7.2,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702283","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}

{"title":"Ferrite-based nanomaterials for photocatalytic CO₂ reduction: Synthesis, properties, and mechanistic insights","authors":"Khaled M. Amin ,&nbsp;Nada A. Eldeeb ,&nbsp;Zineb Gargar ,&nbsp;Ibrahim M.A. Mohamed ,&nbsp;Mohamed Elsenety ,&nbsp;Mahmoud M. Emara ,&nbsp;M. Abd Elkodous ,&nbsp;Marwa M. Abouelela ,&nbsp;Poussy A. Ibrahim ,&nbsp;Abdelmoneim A. Ayed ,&nbsp;Hani Nasser Abdelhamid ,&nbsp;Hesham A. Hamad","doi":"10.1016/j.jcou.2025.103175","DOIUrl":"10.1016/j.jcou.2025.103175","url":null,"abstract":"<div><div>The scientific community has shown increasing interest in the use of magnetic nanoparticles, particularly ferrite-based nanomaterials, for the photocatalytic reduction of carbon dioxide (CO₂). Compared to other nanomaterials, they could provide a range of advantageous characteristics, including high performance, low cost, low toxicity, and distinctive magnetic properties that facilitate separation using external magnetic fields. This review offers a comprehensive and updated assessment of ferrite-based magnetic nanomaterials for photocatalytic CO₂ reduction. It uniquely integrates recent advancements in synthesis, properties, and mechanistic insights, highlighting emerging materials to bridge fundamental science with practical challenges for sustainable CO₂ conversion and solar fuel generation. It presents a thorough overview of their synthesis, characterization, and photocatalytic properties, surveying techniques like dimensional tuning, co-catalyst loading, doping, coupling with plasmonic materials, oxygen vacancies, charge separation methods, morphological optimization, porosity enhancement, heterojunction formation, and Z-scheme implementation. By bridging the gap between fundamental science and applied challenges, this review identifies emerging design principles and future directions for developing highly efficient, magnetically recoverable photocatalysts aimed at mitigating CO₂ emissions through solar-driven chemical transformation.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"100 ","pages":"Article 103175"},"PeriodicalIF":7.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680774","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}

{"title":"Boosting electrochemical CO2 reduction to CO by regulating pressure in zero-gap electrolyzer","authors":"Muhammad Shakir Hussain ,&nbsp;Sheraz Ahmed ,&nbsp;Chirong Sun ,&nbsp;Hyung-Suk Oh ,&nbsp;Jaehoon Kim","doi":"10.1016/j.jcou.2025.103179","DOIUrl":"10.1016/j.jcou.2025.103179","url":null,"abstract":"<div><div>The electrochemical reduction reaction of CO₂ presents a promising strategy for both CO₂ utilization and renewable energy storage. However, for this process to be economically viable, it must achieve high energy efficiency, high product selectivity, and suppression of the hydrogen evolution reaction (HER) at low cell voltages and industrially relevant current densities. Thus, this paper introduces a high-pressure zero-gap membrane electrode assembly electrolyzer that uses pristine silver nanoparticles (&lt;150 nm) as the cathode catalyst for CO₂-to-CO conversion. Operating at elevated CO₂ pressures of up to 1.5 MPa and in a highly alkaline environment (2 M KOH) considerably enhanced CO selectivity and energy efficiency by reducing ohmic losses and improving reaction kinetics. At an optimized pressure of 1.5 MPa, a high current density of –350 mA cm⁻² was sustained at an applied cell voltage of –3.2 V (–3.0 V, IR-compensated), achieving over 70 % CO Faradaic efficiency and 32 % CO energy efficiency. High-pressure operation also suppressed HER by increasing the local CO₂ concentration at the catalyst surface, thereby improving CO selectivity. Additionally, salt precipitation mechanisms and their effect on catalyst deactivation were discussed.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"100 ","pages":"Article 103179"},"PeriodicalIF":7.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680776","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}

{"title":"Synergistic effects of fluorination on CO2 capture and activation in 1,2,3-triazolium ionic liquids","authors":"Gustavo Chacón-Rosales ,&nbsp;Cristián Valdebenito ,&nbsp;Karina Muñoz-Becerra ,&nbsp;Carlos Cruz ,&nbsp;Cesar Morales-Verdejo ,&nbsp;Kerry Wrighton-Araneda ,&nbsp;Pedro Aguirre ,&nbsp;Gabriel Abarca","doi":"10.1016/j.jcou.2025.103178","DOIUrl":"10.1016/j.jcou.2025.103178","url":null,"abstract":"<div><div>The capture and activation of CO₂ remain a pivotal challenge in addressing climate change, requiring innovative materials with exceptional performance. Ionic liquids (ILs) have emerged as highly promising candidates for CO₂ capture due to their tuneable physicochemical properties, negligible vapor pressure, and ability to be tailored for specific molecular interactions with CO₂. Selective fluorination of ILs can enhance key properties, such as thermal stability and CO₂ capture capacity, without necessarily compromising material stability and minimizing potential environmental and toxicological impacts. In this study, we explored the synergistic effects of fluorination in 1,2,3-triazolium-based ILs on CO₂ capture and activation. Two triazole precursors, 1-benzyl-4-phenyl-1<em>H</em>-1,2,3-triazole (<strong>TR1</strong>) and 1-{[3,5-bis(trifluoromethyl)phenyl]methyl}-4-phenyl-1<em>H</em>-1,2,3-triazole (<strong>TR2</strong>), were synthesized and used to prepare the corresponding ionic liquids: 1-benzyl-3-(perfluorobutyl)-4-phenyl-<em>1 H</em>-1,2,3-triazol-3-ium iodide (<strong>IL-TR1</strong>) and 1-(3,5-bis(trifluoromethyl)benzyl)-3-(perfluorobutyl)-4-phenyl-<em>1 H</em>-1,2,3-triazol-3-ium iodide (<strong>IL-TR2</strong>). Comprehensive structural and electronic analyses, along with CO₂ sorption measurements, revealed that the CO₂ up taking of <strong>TR1,2-CO</strong>_{<strong>2</strong>} and <strong>IL-TR1,2-CO</strong>_{<strong>2</strong>} adducts proved to be more favorable in the IL form, enhancing up to 56 % the CO₂ adsorption. This enhancement suggests a stronger interaction in <strong>IL-TR1,2-CO</strong>_{<strong>2</strong>} owing to electronic effects compensated by relative energy cost due to structural deformations. This remarkable enhancement is attributed to the synergistic electronic effects introduced by the fluoroalkyl groups, which improve the interaction between the IL and CO₂ molecules. These findings highlight the transformative potential of incorporating fluoroalkyl groups to modulate the performance of triazolium ILs. This work paves the way for the rational design of next-generation fluorinated ILs, offering a promising platform for scalable and efficient CO₂ capture applications.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"100 ","pages":"Article 103178"},"PeriodicalIF":7.2,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680775","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}

{"title":"Electrochemical reduction of CO2 by In doped- SnO2 nanoparticles with high stability and activity toward selective formic acid formation","authors":"Jumaa A. Aseeri ,&nbsp;Mabrook S. Amer ,&nbsp;Karthik Peramaiah ,&nbsp;Kuo-Wei Huang ,&nbsp;Abdullah M. Al-Mayouf","doi":"10.1016/j.jcou.2025.103174","DOIUrl":"10.1016/j.jcou.2025.103174","url":null,"abstract":"<div><div>SnO₂ catalysts have been identified as active electrocatalysts for formate (HCOO^─) production in electrochemical CO₂ reduction reactions (eCO₂RR). Nevertheless, it is a tremendous challenge to develop SnO₂ that is durable under the working conditions of eCO₂RR. Here, we present an effective method for the development of indium-doped SnO₂ porous nanoparticles (In (X%) - SnO₂ (NPs)), which are effective electrocatalysts for elevating CO₂ reduction to HCOO^-. We prepared In (X%)-SnO₂ (NPs) with a minimal content of In (≤ 5 %) via the facile evaporation-induced co-assembly (EICA) approach followed by calcination under N₂ and Air atmosphere. Compared with bare SnO₂ (NPs), In(1 %)-SnO₂ (NPs) exhibits a significantly enhanced CO₂ reduction activity with a higher partial current density at −1.2 V vs RHE (-23.56 mA cm⁻²), and higher faradic efficiency (∼98 %) for formic acid production at a wide range of potential (-0.9 to −1.2) V vs RHE. Moreover, the In(1 %)-SnO₂ (NPs) also showed excellent stability for over 50 h and a higher faradic efficiency of 95 % at −0.93 V vs RHE for formate production. It is believed that the porous structure of In(X%)-SnO₂ (NPs) contributes to the enhanced faradic efficiency and stability, and the uniform surface activation of Sn-In/SnO₂ on a homogeneously distributed In(X%)-SnO₂ (NPs) crystal leads to an increase in surface area, oxygen vacancies, electron transfer efficiency, and catalytic activity for eCO₂RR. This approach, which incorporates a porous structure, oxygen vacancies, and element doping, provides an effective route for developing highly active electrocatalysts and enhancing electrocatalytic performance.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"99 ","pages":"Article 103174"},"PeriodicalIF":7.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653409","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}

{"title":"Conversion of propargylic amines with CO2 from flue gas using Lu2CrMnO6 supported by ionic liquid on dendritic nanosilica","authors":"Shulong Liu ,&nbsp;Dulong Feng ,&nbsp;Seyed Mohsen Sadeghzadeh","doi":"10.1016/j.jcou.2025.103176","DOIUrl":"10.1016/j.jcou.2025.103176","url":null,"abstract":"<div><div>The concurrent creation of a phase interface and threadlike architecture can enhance the segregation, enzymatic efficiency, and functionality of dendritic silica fibres (DFNS). Nonetheless, a straightforward and eco-friendly fabrication method remains essential. In this study, we successfully developed a sophisticated dandelion-resembling SiO₂ with an anatase/SiO₂ phase interface and highly distinct surface area using a simple and environmentally benign deep eutectic solvent-modulating technique. The extensive distinct surface area is attributed to its 3D hierarchical structure, composed of 2D ultrathin nanolayers with mesoscopic cavities<strong>.</strong> We synthesized Lu₂CrMnO₆ nanoparticles with ionic liquid loaded on DFNS (Lu₂CrMnO₆@IL-DFNS) through an uncomplicated synthetic route. DFNS provided numerous -OH groups for uniform IL loading via chemical linkage<strong>,</strong> while IL adjusted the fibre dimensions and exposed dynamic adsorption sites of –NH₂ groups, facilitating CO₂ chemisorption. The aggregate morphology of the Lu₂CrMnO₆@IL-DFNS composite remained largely unchanged after Lu₂CrMnO₆@IL loading, maintaining its mesoporous structure, crystalline form, and chemisorptive properties. This catalyst exhibited a low incidence of 2-oxazolidinone generation during the direct synthesis from propargylic amines and CO₂ owing to its limited distinct surface area and fewer active sites.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"99 ","pages":"Article 103176"},"PeriodicalIF":7.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653407","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}

{"title":"Cost-effective process design for methanol synthesis from carbon dioxide hydrogenation","authors":"Sheng-Zhong Huang ,&nbsp;Chih-Yao Lin ,&nbsp;Chianghui Wang ,&nbsp;Akhmat Fauzan Saputra ,&nbsp;Henggar Yudha Hananto ,&nbsp;Nicolas Justin Sutanto ,&nbsp;Anggit Raksajati ,&nbsp;Vincentius Surya Kurnia Adi","doi":"10.1016/j.jcou.2025.103171","DOIUrl":"10.1016/j.jcou.2025.103171","url":null,"abstract":"<div><div>This study explores the development and optimization of the methanol synthesis process via carbon dioxide hydrogenation. To improve the feasibility of products produced from CO₂ and enhance CO₂ utilization, thereby reducing environmental impact, a cost-effective process must be developed. Accordingly, this research introduces an optimization framework capable of handling diverse process configurations, operating variables, and their interactions. This approach enables effective optimization using total annual cost (TAC) as the objective function and significantly enhances process design efficiency. The framework integrates Aspen Plus® with a genetic algorithm (GA) in the MATLAB® environment, allowing automated solution searches and the identification of optimal designs through an elimination-based mechanism. A case study demonstrates that the optimization process refines the process configuration and operating conditions, resulting in significant reductions in operating and capital costs. The optimized process achieves a 44.9 % cost reduction compared to the reference case, highlighting its economic potential. This advancement strengthens the competitiveness of methanol synthesis and promotes broader adoption of CO₂ utilization technologies in industrial applications.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"99 ","pages":"Article 103171"},"PeriodicalIF":7.2,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604485","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}

{"title":"Highly efficient CO2 absorption using improved and functionalized magnetic nanoparticles in physical and chemical absorbents","authors":"A. Hafizi ,&nbsp;A. Hemmatzadeh Dastgerdi ,&nbsp;R. Khalifeh","doi":"10.1016/j.jcou.2025.103173","DOIUrl":"10.1016/j.jcou.2025.103173","url":null,"abstract":"<div><div>One method for reducing global warming is the removal, separation, and utilization of CO₂ from the exhaust streams. Nanofluids, which belong to an innovative category of carbon dioxide capturing agents, exhibit significant promise owing to their unique characteristics. In this study, magnetic nanofluids were investigated to improve the absorption capacity and rate of carbon dioxide in different solvents. For this purpose, glutamine amino acid salt and polyethyleneimine functional groups were applied to functionalize Fe₃O₄ magnetic nanoparticles. The results show that the addition of 0.050 wt% of Fe₃O₄–Glutamine and Fe₃O₄–PEI nanoparticles increased the absorption of carbon dioxide by 21.44 and 31.87 % compared to the aqueous base fluid, respectively. Furthermore, in this study, iron oxide magnetic nanoparticles were coated with silica minerals, Fe₃O₄@SiO₂ core-shell nanostructures were synthesized, and their performance in carbon dioxide absorption was investigated. The findings indicate that the incorporation of 0.075 wt% of Fe₃O₄@SiO₂–Glutamine and Fe₃O₄@SiO₂–PEI nanoparticles at the optimal weight concentration resulted in a 36.04 and 54.10 % enhancement in carbon dioxide absorption, respectively, in comparison to the water-based fluid.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"99 ","pages":"Article 103173"},"PeriodicalIF":7.2,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595422","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}