Greenhouse Gases: Science and Technology最新文献

{"title":"Impact of Wettability on CO2 Mineral Trapping in Carbonate Saline Aquifers: A Reactive Transport Simulation Study","authors":"Reza Khoramian,&nbsp;Ibraheem Salaudeen,&nbsp;Peyman Pourafshary,&nbsp;Masoud Riazi,&nbsp;Riyaz Kharrat","doi":"10.1002/ghg.2387","DOIUrl":"https://doi.org/10.1002/ghg.2387","url":null,"abstract":"<div>\u0000 \u0000 <p>Long-term containment of CO₂ in geological formations depends on both physical and chemical trapping mechanisms. Although capillary and solubility trapping have been widely studied, the role of reservoir wettability in governing geochemical interactions remains poorly understood, particularly in reactive carbonate systems. This study investigates how contrasting wetting states influence multiphase flow and mineralization in carbonate saline aquifers. Reactive transport simulations were conducted using a compositional simulator under water- and CO₂-wet conditions over a 60-year period. The model incorporates hysteresis in relative permeability, capillary pressure variation, and calcite reaction kinetics to evaluate the evolution of capillary, solubility, and mineral trapping mechanisms. Results show that wettability strongly affects both phase distribution and geochemical reactivity. Under CO₂-wet conditions, mineral trapping more than doubled compared to the water-wet case (6.5% vs. 2.8%) due to enhanced gas–rock contact and sustained local acidification. Solubility trapping also increased markedly (38.3% vs. 20.9%), facilitated by continuous CO₂ pathways that improved convective mass transfer. However, capillary trapping was significantly lower, resulting in reduced total retention (63.5%) compared to the water-wet scenario (84.9%), where capillary forces immobilized more CO₂ but restricted mineralization. This analysis demonstrates that wettability directly influences geochemical reactions by controlling CO₂ access to mineral surfaces and shaping local pH conditions. The findings suggest that selectively adjusting wettability, depending on reservoir lithology and storage goals, may enhance long-term CO₂ immobilization through mineral trapping without compromising containment.</p>\u0000 </div>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"16 1","pages":"46-61"},"PeriodicalIF":2.8,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Public Perceptions and Engagement for Carbon Capture, Utilization, and Storage: Literature Review With a Case Study of Utah, USA","authors":"Ting Xiao,&nbsp;Erin Middleton,&nbsp;Omar Bakelli,&nbsp;Sophia Cheng,&nbsp;Danyang Zhu,&nbsp;Lei Xu,&nbsp;Brian McPherson","doi":"10.1002/ghg.2381","DOIUrl":"10.1002/ghg.2381","url":null,"abstract":"<p>Carbon dioxide capture, utilization, and storage (CCUS) is a potential key to mitigating anthropogenic CO₂ emissions and associated impacts on global climate change. Successful CCUS deployment hinges on both technological advancements and public support. This article examines public perception research on CCUS over the last 25 years, finding that although awareness and acceptance have slightly increased, overall awareness remains low (less than 50%). No clear relationship is found between public awareness and support from these studies. Public acceptance for CCUS deployment depends on perceived benefits and risks and trust in project developers and authorities. Effective public engagement requires diverse approaches for communities and stakeholders, especially at an early stage in target areas. The media plays a critical role in shaping and evolving public attitudes about CCUS. Newspaper coverage in Utah, USA, was selected as a case study. Utah's coal and energy industries are vital to its economy, with CCUS seen crucial for reducing CO₂ emissions. We identified and reviewed approximately 200 newspaper reports on carbon capture and geological storage since the early 21st century. Storylines such as “saving Utah's coal industry” and “key element of energy transition” were frequently used. Technical, economic, and political frames were mostly discussed with neutral to positive tones. To further engage stakeholders and the public, building relationships and trust in an early stage through a variety of communication strategies may be necessary. A cross-sector systemic coordination mechanism, highlighting stakeholder engagement, education, and mutual learning, should be established.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"16 1","pages":"125-157"},"PeriodicalIF":2.8,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ghg.2381","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Digital/Visual Twin for Real-Time Leak Detection in Gas Pipelines Under Multiphase Flow Conditions","authors":"Wahib A. Al-Ammari,&nbsp;Ahmad K. Sleiti,&nbsp;Matthew Hamilton,&nbsp;Hicham Ferroudji,&nbsp;Sina Rezaei Gomari,&nbsp;Ibrahim Hassan,&nbsp;Rashid Hasan,&nbsp;Ibnelwaleed A. Hussein,&nbsp;Mohammad Azizur Rahman","doi":"10.1002/ghg.2379","DOIUrl":"https://doi.org/10.1002/ghg.2379","url":null,"abstract":"<p>Leak detection (LD) in gas pipelines (GPs) is critical for ensuring operational safety and environmental protection. This study presents a novel digital/visual twin for detecting single- and multiple leaks in GPs under both single- and multiphase flow conditions. The framework of the digital twin leverages experimental data from a multiphase flow-testing loop and synthetic data generated using OLGA software to validate and optimize machine learning (ML) models for leak detection and localization. Several ML models, including random forest (RF), support vector machine (SVM), <i>k</i>-nearest neighbors (<i>k</i>-NNs), decision tree regression (DTR), and eXtreme gradient boosting (XGBoost), were tested individually for their ability to classify leak conditions and localize leaks. Initial results showed moderate performance for individual models, with accuracies ranging from 42% to 57%. However, a significant improvement was observed through the use of advanced techniques such as stacking models, feature engineering, and data averaging. The final stacking regressor model, which combined the strengths of RF, <i>k</i>-NN, and SVM, outperformed the individual models, achieving <i>R</i>² values exceeding 0.96 with an accuracy of 90% in complex multiple leak scenarios. The digital twin system integrates this ML framework with real-time data visualization, allowing operators to visualize offshore pipeline conditions, detect leaks, and localize leak positions using a virtual twin representation of the physical pipeline. The virtual twin provides an interactive, high-fidelity interface that enables users to monitor and analyze leak events as they occur, enhancing situational awareness and decision-making capabilities. The combination of advanced ML techniques and digital twin technology provides a robust and accurate solution for real-time LD in offshore pipelines. It significantly improves detection performance in multiphase flow conditions. This innovative approach sets a new benchmark for offshore pipeline monitoring systems, offering superior LD capabilities under a range of operational conditions. The system is readily adaptable for integration with SCADA platforms and pipeline monitoring infrastructures, supporting deployment in offshore oil and gas operations, industrial gas distribution networks, and critical energy corridors where early LD is essential.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"15 5","pages":"513-530"},"PeriodicalIF":2.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ghg.2379","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145297204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Nitrogen and Oxygen Functional Groups on Bio-Based Porous Carbon Modified Using Activation Modification Treatment to Improve CO2 Adsorption Performance","authors":"Farihahusnah Hussin,&nbsp;Nur Syahirah Mohamed Hatta,&nbsp;Siok Ee Lam,&nbsp;Mohamed Kheireddine Aroua","doi":"10.1002/ghg.2377","DOIUrl":"https://doi.org/10.1002/ghg.2377","url":null,"abstract":"<div>\u0000 \u0000 <p>This study explores the role of nitrogen and oxygen contents on the surface of modified coconut shell porous carbon to improve its physicochemical properties thus increase CO₂ adsorption capacity. The synthesis of porous carbon was performed using an activation modification method at low temperature (200°C) followed by chemical activation to enhance surface properties of porous carbon. In this study, the surface properties of porous carbon were modified using several types of nitrogen-containing functional groups, such as urea, melamine and amine groups (monoethanolamine [MEA] and 2-(methylamino)ethanol [MAE]). Changes in the surface morphology of the modified porous carbon were characterised using several analytical techniques, including Brunauer–Emmett–Teller (BET) surface area, surface morphology, elemental composition analysis and Raman spectroscopy. The adsorption performance of the modified porous carbon was measured using packed-bed CO₂ adsorption under low-pressure conditions. Subsequently, the highest breakthrough time and CO₂ adsorption capacity values were compared. The analysis of pore size distribution curves confirmed the existence of a combination of micropores, mesopores and a small amount of macropores in all modified porous carbon samples. As expected, the results show that all modified porous carbon samples showed increased breakthrough time and CO₂ adsorption capacity compared to coconut shell activated carbon (CS). Among the modified activated carbon, CS-MAE produced the highest breakthrough time (27 min) and CO₂ adsorption capacity (1.48 mmol/g). Finally, the experiment results from multiple adsorption–desorption cycles show good regeneration performance of CS-MAE. This finding highlights the feasibility of using CS-MAE as a capturing agent for CO₂ adsorption.</p>\u0000 </div>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"15 5","pages":"531-541"},"PeriodicalIF":2.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145297203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Alkanolamines Corrosivity During CO2 Capture and in the Presence of Deep Eutectic Solvent and Ionic Liquid as Inhibitor","authors":"Mysara Eissa Mohyaldinn,&nbsp;Victor Ola,&nbsp;Aleeya Farzana Aidy,&nbsp;Muhammad Firdaus Bin Md Saidin,&nbsp;Weallfearnius Justin,&nbsp;Tigabwa Y. Ahmed,&nbsp;Mohammed A. Ayoub,&nbsp;Mohd Dzul Hakim B. Wirzal","doi":"10.1002/ghg.2372","DOIUrl":"https://doi.org/10.1002/ghg.2372","url":null,"abstract":"<div>\u0000 \u0000 <p>Carbon capture and storage (CCS) technologies are vital for reducing carbon dioxide (CO₂) emissions, but corrosion threatens the efficiency and durability of CCS infrastructure. Accurate assessment of alkanolamine solution corrosivity and effective corrosion inhibitors are essential for reliable CCS design. This study evaluates the corrosion inhibition performance of reline (a deep eutectic solvent, DES) and 1-ethyl-3-methylimidazolium trifluoroacetate (an ionic liquid, IL) on carbon steel in carbonated amine solutions using the weight loss method. Before the use of corrosion inhibitors, it presents an experimental investigation of the corrosivity of three alkanolamines commonly used for carbon capture, namely, monoethanolamine (MEA), diethanolamine, and methyl diethanolamine, using electrochemical methods in addition to surface morphology analysis using field emission scanning electron microscopy. Through meticulous experimentation involving the immersion of carbon steel API 5L X52 metal specimens in CO₂-saturated MEA solutions with varying DES and IL concentrations and immersion times, the study uncovers promising insights. The amine concentration used was 10–30 wt% at a temperature of 60–70°C with inhibitor concentration of reline at 0, 30, 50, and 70 wt% and IL at 0.1, 0.3, and 0.5 wt%. A notable reduction in corrosion rates is observed with increasing DES concentrations (a maximum of 77.1% in inhibiting efficiency at 70 wt% DES), underscoring the protective role of DES in inhibiting corrosion. Additionally, the IL was found to be effective as a corrosion inhibitor, with the optimum concentration being at 0.5 wt% giving a maximum inhibition efficiency of 69.8%. This study emphasizes the importance of DES and IL for effective corrosion inhibition in the amine system, thereby ensuring the long-term sustainability and efficacy of CCS infrastructure. 2025 Society of Chemical Industry and John Wiley &amp; Sons, Ltd.</p>\u0000 </div>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"15 5","pages":"558-572"},"PeriodicalIF":2.8,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145297621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic Promotion of Ni/La2O3 Catalysts by Copper for Efficient Dry Reforming of Methane","authors":"Parisa Ebrahimi,&nbsp;Methene Briones Cutad,&nbsp;Anand Kumar,&nbsp;Mohammed J. Al-Marri","doi":"10.1002/ghg.2370","DOIUrl":"https://doi.org/10.1002/ghg.2370","url":null,"abstract":"<p>The catalytic performance of Ni/La₂O₃ and Ni–Cu/La₂O₃ for dry reforming of methane (DRM) was investigated, focusing on reducibility, stability, and coke resistance. Cu incorporation lowered the Ni reduction temperature, as revealed by temperature-programmed reduction (TPR), enhancing hydrogen spillover and oxygen vacancy formation. X-ray photoelectron spectroscopy (XPS) confirms that Cu stabilizes the oxygen lattice, minimizes carbonate accumulation, and facilitates CO₂ activation. Catalytic tests at 850°C demonstrated 78% CH₄ conversion and 96% CO₂ conversion for Ni–Cu/La₂O₃, compared to 55% and 72% for Ni/La₂O₃, respectively. X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) confirmed that Cu prevents Ni sintering, maintaining high dispersion. Carbon deposition analysis showed 0.50 wt.% total carbon for Ni–Cu/La₂O₃, slightly higher than Ni/La₂O₃ (0.42 wt.%), but with a 40% reduction in graphitic carbon. The synergistic effect between Cu and Ni optimizes Ni dispersion, modulates electronic properties, and weakens Ni–La₂O₃ interactions, improving CH₄ activation and carbon removal. Ni–Cu/La₂O₃ exhibits outstanding activity and resistance to deactivation, making it a highly effective and stable catalyst for CO₂ conversion and syngas production in DRM, with a strong synergy between Ni and Cu, along with the stabilizing influence of the La₂O₃ support, enhancing its overall performance and durability.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"15 5","pages":"542-557"},"PeriodicalIF":2.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ghg.2370","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145297444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable Strategies for Optimizing the Reduction of GHG Emissions in Qatar's Football Stadiums","authors":"Mustapha Alaoui,&nbsp;Fahad Abdulla Thani Al Zarraa","doi":"10.1002/ghg.2363","DOIUrl":"https://doi.org/10.1002/ghg.2363","url":null,"abstract":"<div>\u0000 \u0000 <p>Greenhouse gas (GHG) emissions peaked significantly in the last few decades, leading to environmental issues like global warming and climate change. Soccer stadiums are highly densely populated and consume significant amounts of energy, which results in emitting a large amount of GHG. It is crucial, therefore, to find an efficient way to optimize these emissions. Soccer (football) stadiums are densely populated facilities that consume vast amounts of energy, resulting in considerable GHG emissions; however, identifying effective strategies to optimize and reduce these emissions remains a gap in the literature. This study, describes rational approaches to optimize the reduction of GHG emissions and understand its mechanism in soccer stadiums in Qatar. This is driven by the data collected from global systems (Fédération Internationale de Football Association [FIFA] reports and global sustainability assessment system) and local ones (Qatar Football Association and the Ministry of Environment and Climate Change, in addition to the local stadiums and clubs in Qatar). Various variables were considered, and also hybrid systems of principal component analysis (PCA) and machine learning (ML) approaches were used for the optimization process in five stadiums: Stadium 974, Al Janoub, Al Bayt, Lusail Stadium, and Education City Stadium. The study employed a PCA-assisted ML framework to identify key sustainability factors and predict the impact of interventions on emissions for these five stadiums. The results demonstrate a successful reduction of GHG emissions by 20%–40% and an improvement in CO₂ offsetting by 40%–100%, besides increasing water conservation to 70%–95% and boosting renewable energy integration from 15% to 100% in Qatar's stadium. These results could be used as an initial platform for promoting carbon footprint reduction in other stadiums worldwide. In summary, the findings offer a practical roadmap for stadium managers and policymakers to achieve significant GHG emission cuts while enhancing sustainability performance.</p>\u0000 </div>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"15 5","pages":"573-580"},"PeriodicalIF":2.8,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145297104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Screening of Lithium-Based Salts in Non-Aqueous Electrolyte Solution of Monoethanolamine for Carbon Dioxide Capture","authors":"Aisyah Ilyani Ismail,&nbsp;Mohd Azlan Kassim,&nbsp;Mohamed Kheireddine Aroua","doi":"10.1002/ghg.2362","DOIUrl":"https://doi.org/10.1002/ghg.2362","url":null,"abstract":"<p>This study investigates the screening of lithium-based salts in non-aqueous electrolyte solutions of monoethanolamine (MEA) for potential use in integrated carbon capture and conversion (ICCC) technology. Experimental measurements of density, viscosity, nitrous oxide (N₂O) solubility, and CO₂ solubility were conducted for various lithium salts, including lithium chloride (LiCl), lithium bromide (LiBr), and lithium nitrate (LiNO₃), in MEA–dimethyl sulfoxide (DMSO) system at 303.15 K at different CO₂ pressures ranging from 344 to 1379 kPa. The results indicated that the addition of lithium salts to the amine solution significantly enhances CO₂ absorption capacity, exceeding the benchmark value of 0.5 mol CO₂/mol MEA typically reported for 5 M MEA aqueous systems. The highest CO₂ solubility in the system was observed following the order 2 M MEA + 0.5 M LiBr &lt; 2 M MEA + 0.5 M LiNO₃ &lt; 2 M MEA + 0.5 M LiCl in DMSO with corresponding values of 1.2213, 1.2801, and 1.3381 mol CO₂/mol MEA, respectively, identifying LiCl as the most effective additive. It was also found that using DMSO as an organic solvent greatly enhanced the CO₂ absorption capacity compared to water, evidenced by Henry's law constant determined using N₂O analogy, in addition to its lower sensible heat than water. The findings demonstrate that MEA in organic solvent shows a promising performance in CO₂ capture, with CO₂ loading higher than the industrial standard (&lt;0.5 mol CO₂/mol MEA). Ultimately, the screening process outlined in this study serves as a foundation for future research aimed at optimizing electrolyte formulations for enhanced carbon capture efficiency.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"15 5","pages":"581-595"},"PeriodicalIF":2.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ghg.2362","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145297079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Circular Economy Through Utilizing the Vickrey Price Auction for Carbon Permit Allocation","authors":"Mustafa Oguz Afacan,&nbsp;Ahmed Ali Khalifa","doi":"10.1002/ghg.2359","DOIUrl":"https://doi.org/10.1002/ghg.2359","url":null,"abstract":"<p>Carbon pricing is crucial to advancing a circular economy by internalizing the environmental costs of emissions. Governments often use auctions to distribute carbon permits. This article applies the Vickrey pricing auction to carbon permit allocation for the first time in the literature. We show that it encourages truthful bidding and efficiently allocates permits based on true valuations. This contrasts with the first-price auction, used in the European Union Emissions Trading System and the California Cap-and-Trade Market, where bidders are incentivized to misreport their bids. Our analysis demonstrates that the Vickrey pricing auction enhances market transparency, eliminates manipulation, and improves the efficiency of carbon permit allocation. We discuss the implications for policymakers and stakeholders in designing carbon-pricing policies to combat climate change.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"15 5","pages":"596-600"},"PeriodicalIF":2.8,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ghg.2359","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145297578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isotherms, Thermodynamics and Regeneration Studies of CO2 Adsorption on Activated Carbon Impregnated With Waste-Sourced Natural Amino Acids","authors":"Nur Syahirah Mohammed Hatta,&nbsp;Farihahusnah Hussin,&nbsp;Lai Ti Gew,&nbsp;Mohamed Kheireddine Aroua","doi":"10.1002/ghg.2354","DOIUrl":"10.1002/ghg.2354","url":null,"abstract":"<p>This study investigated the CO₂ adsorption isotherms, thermodynamic properties and regeneration efficiency of palm shell activated carbon (AC) impregnated with waste-sourced natural amino acids from egg white (EW), namely, ACEW-30. Initially, the performance of ACEW-30 was compared with AC impregnated with fresh EW and synthetic amino acids using fixed-bed adsorption system. The results revealed that ACEW-30 prepared from waste sources demonstrated comparable performance with other adsorbents tested, suggesting its potential for waste valorisation. Afterwards, the data were fitted to various adsorption isotherm models, namely, Langmuir, Freundlich, Sips, Toth, Dubinin–Radushkevich and Temkin, to characterise the adsorbate-adsorbent interaction between CO₂ molecules and ACEW-30 at different adsorption temperatures (25–50°C) and CO₂ partial pressures (0.15–0.30 vol.%). The isotherm results were used to evaluate thermodynamic properties using Van't Hoff and Clausius–Clapeyron equations. The effect of regeneration conditions (desorption temperatures and nitrogen purging flow rate) have also been investigated prior to cyclic adsorption–desorption experiments. Overall findings indicate that CO₂ adsorption on ACEW-30 was best fitted to Freundlich isotherm, spontaneous and exothermic in nature. The isosteric heat of adsorption was within 20–24 kJ/mol, suggesting that the adsorption mechanism lies within the intermediate region between purely physical and purely chemical. Remarkably, the results obtained from regeneration studies reveal that ACEW-30 exhibited high regeneration stability at 25°C and 800 mL/min purging flow rate, with more than 87% efficiency even after 20 cyclic adsorption–desorption.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"15 4","pages":"472-486"},"PeriodicalIF":2.8,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ghg.2354","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}