Carbon Capture Science & Technology最新文献

{"title":"Enhanced CO2 capture via calcium looping with mesoporous ladle furnace stainless steel slag","authors":"Priyanka Kumari ,&nbsp;Farah Kaddah ,&nbsp;Nahla Al Amoodi ,&nbsp;Ahmed AlHajaj ,&nbsp;Ludovic F. Dumée","doi":"10.1016/j.ccst.2024.100354","DOIUrl":"10.1016/j.ccst.2024.100354","url":null,"abstract":"<div><div>CaO-based materials have attracted considerable interest because of their potential roles in thermochemical CO₂ capture via the calcium looping (CaL) process. The steel manufacturing sector inevitably generates substantial amounts of slag as a by-product, posing environmental issues such as soil contamination if left untreated. Despite its abundance and low cost, steel slag, which contains 20–60 % CaO, has not been extensively researched for its potential in the CaL process. This study introduces ladle furnace slag (LFS) as an optimal CaO-rich material for developing mesoporous composites to improve CO₂ sequestration in the CaL process. Using an autoclave reactor/muffle furnace setup, we conducted a parametric investigation on operational variables including reaction time, temperature, pressure, and liquid-solid ratio and determined the kinetics of carbonation/calcination reaction of CaL process. Our findings reveal that the CO₂ capture performance of modified LFS surpassed that of the bare LFS, achieving a CO₂ uptake of 7.55 ± 0.01 g per g of sorbent over 20 cycles. Additionally, the modified LFS exhibited the capability to undergo a minimum of 20 regeneration cycles, reaching steady state after the 15th cycle with minimal variation of 0.01 g per g of sorbent. The enhanced stability was linked mainly due to the presence of ceramics such as Al₂O₃ and Fe₂O₃ in ratios of 1:5 and 1:6.5 respectively, with respect to CaO, achieved through acid etching. Such mineralogical transformation of the modified LFS improved its resistance towards sintering while ensuring 100 % recycling of metals in the LFS. Therefore, this study highlights the sustainable utilization of LFS as a valuable and efficient sorbent for CO₂ capture, showcasing its potential for repurposing in environmental applications.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100354"},"PeriodicalIF":0.0,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lattice oxygen activity regulation by alkaline earth metals in iron oxides for biomass chemical looping gasification","authors":"Guangyao Yang ,&nbsp;Wenjie Xu ,&nbsp;Jingbo Jia ,&nbsp;Changfu You ,&nbsp;Haiming Wang","doi":"10.1016/j.ccst.2024.100353","DOIUrl":"10.1016/j.ccst.2024.100353","url":null,"abstract":"<div><div>Biomass chemical looping gasification (BCLG) represents a highly promising approach for syngas production. A critical factor in BCLG is the selection of suitable oxygen carriers (OCs) that exhibit both high carbon conversion (η_C) and CO selectivity (S_CO). In this study, iron-based OCs were modified with various alkaline earth metals (AEMs, i.e. Ca, Sr, and Ba) to modulate lattice oxygen activity. The effects of oxygen-to-carbon ratio (O/C), temperature, and cyclic operation on BCLG performance were investigated in a fixed-bed reactor. Among the AEM-modified OCs, Ca1Fe2 (spinel), Sr1Fe1 (perovskite), and Ba1Fe2 (spinel), showed superior performance compared to their Ca, Sr, and Ba-Fe counterparts, respectively. At 900 °C and O/C = 2, the pristine Fe₂O₃ exhibited a η_C of 82 % and S_CO of 53 %. The η_C for Sr1Fe1 and Ba1Fe2 reached &gt;90 % at 900 °C, with S_CO increased to &gt;70 %, resulting in a significantly higher syngas yield (H₂+CO) of &gt;800 mL/g-biomass (vs. 560 for Fe₂O₃). In contrast, the addition of Ca showed a much less pronounced effect. In the cyclic test at 900 °C, Ba1Fe2 showed the poorest stability due to a severe sintering. Sr1Fe1 presented the best stability with a syngas yield of 722 mL/g after 10 cycles. The decrease in the activity of Sr1Fe1 was mainly due to the phase separation of SrFeO_3-x after multiple cycles. Thermodynamically, Sr1Fe1 is favorable for the production of CO instead of CO₂, leading to its intrinsic high selectivity. As demonstrated by ¹⁸O-isotopic exchange and H₂-TPR, the activity of surface lattice oxygen and the diffusivity of bulk lattice oxygen was boosted by Sr addition, which caused the high η_C and S_CO of Sr1Fe1 at the same time. Thus, even at O/C=5, S_CO for Sr1Fe1 reached 64 % with η_C up to 99 %, comparing to the S_CO=31 % and η_C=91 % for Fe₂O₃.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100353"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mixed matrix membrane formation with porous metal–organic nanomaterials for CO2 capture and separation: A critical review","authors":"Claire Welton ,&nbsp;Fan Chen ,&nbsp;Hong-Cai Zhou ,&nbsp;Shouliang Yi","doi":"10.1016/j.ccst.2024.100347","DOIUrl":"10.1016/j.ccst.2024.100347","url":null,"abstract":"<div><div>Due to the increasingly severe global warming trend, the reduction of CO₂ emission and carbon capture have attracted growing interest. The separation of CO₂ from gas mixtures, especially from point source and the atmosphere, is considered as one of the most important strategies for mitigating climate change. Porous metal–organic nanomaterials (PNMs), including metal-organic frameworks (MOFs) and metal-organic polyhedra (MOPs) have been extensively investigated in the fields of carbon capture, catalysts, sensors, biomedical imaging and gas storage. Their inherent pores, diverse surface function groups and potential modification possiblities make them competitive carbon capture materials. This review will introduce detailed scientific and technological advancements in PNMs and explain their fitness for carbon capture and separation, followed by the fabrication and application of mixed matrix membranes (MMMs) with PNMs. The current challenges appreared and solutions to improve the MMMs’ CO₂ separation performance will also be stressed.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100347"},"PeriodicalIF":0.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Outside Back Cover","authors":"","doi":"10.1016/S2772-6568(24)00163-5","DOIUrl":"10.1016/S2772-6568(24)00163-5","url":null,"abstract":"","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100352"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxidative dehydrogenation of ethane to ethylene with CO2 via Mg-Al spinel catalysts: Insight into dehydrogenation mechanism","authors":"Qinglin Du ,&nbsp;Xiaoyu Zhang ,&nbsp;Feng Wang ,&nbsp;Wenqiang Liu","doi":"10.1016/j.ccst.2024.100327","DOIUrl":"10.1016/j.ccst.2024.100327","url":null,"abstract":"<div><div>This study compares the CO₂-assisted oxidative dehydrogenation of ethane (CO₂-ODHE) performance of Mg-Al spinel catalysts doped with various metals (Cr, Fe, Co, Ga) that possess dehydrogenation activity. Both experimental and theoretical analyses were conducted to explore the reaction mechanism of CO₂-ODHE on the spinel catalyst. The findings indicate that the MgFeAlO₄ spinel catalyst exhibited CO₂-ODHE activity at 600 °C, achieving a CO₂ conversion rate of 20.3 %, an ethane conversion rate of 27.9 %, and an ethylene selectivity of 87.9 %. Mechanistic studies revealed that CO₂ activation primarily occurs through the reverse water-gas shift reaction, and density functional theory calculations identified the doped metal ions as the principal active sites for ethane activation. These results suggest that CO₂-ODHE on the spinel surface follows a mechanism of catalytic dehydrogenation coupled with the reverse water-gas shift reaction. Additionally, the effects of Fe doping contents and reaction temperature were investigated. When the ratio of Fe³⁺ to Al³⁺ was 1, corresponding to the MgFeAlO₄ spinel catalyst, the CO₂-ODHE performance was optimal, yielding 23.3 % ethylene. Increasing the reaction temperature enhanced ethane conversion but reduced ethylene selectivity, with both ethane conversion and ethylene selectivity reaching approximately 49 % at 700 °C.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100327"},"PeriodicalIF":0.0,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Methane and CO2 consumption from a synthetic waste gas by microbial communities in enriched seawater","authors":"Niels-Ulrik Frigaard ,&nbsp;Stefan Ernst Seemann","doi":"10.1016/j.ccst.2024.100324","DOIUrl":"10.1016/j.ccst.2024.100324","url":null,"abstract":"<div><div>Methane (CH₄) and carbon dioxide (CO₂) are potent greenhouse gases produced as waste in carbon-based fuel processes. This study investigates the use of natural microbial communities to consume CH₄ and CO₂ and convert these gases into biomass. Seawater enriched with nutrients was exposed to a gas stream containing CH₄ and CO₂ under either light or dark conditions. The microbial communities that developed included methanotrophic bacteria consuming CH₄ and cyanobacteria and microalgae consuming CO₂. Chemotaxonomic markers showed that phototrophic growth increased significantly only in the light, with an early dominance by cyanobacteria later overtaken by microalgae, while methanotrophic growth increased significantly only in the dark. Near-full-length 16S and 18S rRNA gene sequencing using Nanopore technology revealed that the microbial diversity in the incubated cultures was significantly reduced compared to the natural communities in the seawater used as inoculum. The most abundant phototrophs in the light-incubated cultures were green algae from the genera <em>Picochlorum, Tetraselmis, Chlamydomonas</em>, and <em>Nannochloris</em>, and a few cyanobacterial genera mostly from Cyanobacteriales and Synechococcales (SILVA taxonomy). <em>Methylomicrobium</em> and <em>Methylobacter</em> were the most abundant methanotrophs in the dark-incubated cultures, whereas <em>Methylomonas methanica</em> was the only methanotroph with notable abundance under light conditions. Methanol-oxidizing <em>Methylophaga</em> were also highly abundant in dark-incubated cultures suggesting that these organisms were also important carbon-oxidizers in the CH₄ consuming microbiomes. We conclude that optimal CH₄ and CO₂ consumption may require separating dark-dependent CH₄ and light-dependent CO₂ consuming microbiomes, or identifying symbiotic co-cultures of methanotrophs that are compatible with the light conditions needed by phototrophs. This research highlights potential microbial candidates for reducing the climate impact of flare gas and other waste gases containing CH₄ and CO₂.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100324"},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single-component and binary H2O and CO2 co-adsorption isotherm model on amine-functionalised Mg-Al mixed metal oxides","authors":"Zhuozhen Gan ,&nbsp;Qingyang Shao ,&nbsp;Bingyao Ge ,&nbsp;Qiang Wang ,&nbsp;Xuancan Zhu","doi":"10.1016/j.ccst.2024.100328","DOIUrl":"10.1016/j.ccst.2024.100328","url":null,"abstract":"<div><div>Development of amine-functionalised CO₂ adsorbents for negative emissions is a popular research topic in the field of direct air capture (DAC). While most studies aim to improve the adsorption capacities of DAC adsorbents, it is imperative to accurately model the DAC process to understand its roles and reduce operating costs. To this end, a comprehensive understanding and systematic modelling of the adsorption behaviour of amine-functionalised materials is essential. This includes examining the effect of H₂O on CO₂ adsorption under air conditions and desorption by steam purging. In this study, a fundamental analysis of single-component and binary H₂O and CO₂ adsorption by amine-functionalised Mg-Al mixed metal oxides (MMOs) was performed. Single-component H₂O and CO₂ adsorption experimental data were obtained using Guggenheim Anderson De Boer and modified Sips models, respectively. To fit the CO₂ uptake at different temperatures (25–75 °C), CO₂ isotherm models take into account both thermodynamic and diffusive factors. Subsequently, a novel mechanistic H₂O and CO₂ co-adsorption isotherm model is developed and calibrated with the breakthrough experiments. The mechanistic co-adsorption isotherm model captured the improvement in the equilibrium CO₂ capacity in the presence of H₂O. Moreover, the co-adsorption model considers the synergistic effects of H₂O and heat. Overall, the proposed isotherm models are expected to be useful in modelling DAC processes based on novel amine-functionalised adsorbents under complex conditions and ultimately guiding DAC process design and optimisation.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100328"},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Progress in carbon capture and impurities removal for high purity hydrogen production from biomass thermochemical conversion","authors":"Shengxiong Huang ,&nbsp;Wenyao Duan ,&nbsp;Ziheng Jin ,&nbsp;Shouliang Yi ,&nbsp;Quanwei Lv ,&nbsp;Xia Jiang","doi":"10.1016/j.ccst.2024.100345","DOIUrl":"10.1016/j.ccst.2024.100345","url":null,"abstract":"<div><div>Renewable hydrogen production from biomass thermochemical conversion is an emerging technology to reduce fossil fuel consumptions and carbon emissions. Biomass-derived hydrogen can be produced by pyrolysis, gasification, alkaline thermal treatment, etc. However, the removal of impurities from biomass thermochemical conversion products to improve hydrogen purity is currently technical bottleneck. It is important to assess and investigate the types and properties of impurities, the difficulty of separation, and the impact on downstream utilization of hydrogen in the biomass-derived hydrogen production process. The key objectives of this comprehensive review are: (1) to reveal the current status and necessity of developing biomass-derived hydrogen production; (2) to evaluate the types, devices and impurities distribution of biomass thermochemical conversion; (3) to explore the formation pathways and removal technologies of typical impurities of tar, CO₂, sulfides, and nitrides in hydrogen production process; and (4) to propose future insights on the separation technologies of typical impurities to promote the gradual substitution of biomass-derived hydrogen for fossil-derived energy.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100345"},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Addressing solar power curtailment by integrating flexible direct air capture","authors":"Yuhang Liu ,&nbsp;Yihe Miao ,&nbsp;Lun Wang ,&nbsp;Xilin Gu ,&nbsp;Zhaoyang Li ,&nbsp;Shigenori Fujikawa ,&nbsp;Lijun Yu","doi":"10.1016/j.ccst.2024.100304","DOIUrl":"10.1016/j.ccst.2024.100304","url":null,"abstract":"<div><div>Direct air capture (DAC) is one of the principal negative emission technologies for addressing climate change, but its deployment is hindered by the high cost and substantial energy consumption. Only being powered by low-cost renewable energy, DAC can maximize its negative emission potential, in return, DAC can help the decarbonization of the power sector. Due to the intermittency of renewable energy, effectively integrating renewable energy with DAC currently remains a significant challenge. To address this research gap, this study focuses on exploring flexible operation strategies of the adsorbent based DAC system, coupling them with an actual photovoltaic (PV) power station, and making DAC systems participate in minute-level dispatch. The adsorbent based DAC system adopts a modular design, allowing each unit to operate as an independent load, not requiring continuous operation and enabling interruption between cycles or processes. Additionally, the adsorption process is curtailable and extendable to dynamically adjust the time of activating desorption. The flexible operational combination allows the DAC to better match the fluctuation of PV. Based on actual data and time-of-use pricing, this paper conducts a comparative techno-economic analysis of DAC and battery energy storage (BES) systems. The results indicate that deploying flexible DAC is the most cost-effective among different given scenarios. Deploying 46,800 DAC units primarily powered by solar curtailment can achieve the lowest cost of $30,000/MW-year for the selected 1000 MW PV power station, along with an 80 % curtailment consumption rate and annual 634,000 tons CO₂ captured. Before 2030, coupling DAC with PV can effectively address the curtailment issues and assist with peak shaving. As carbon prices gradually rise and adsorbent costs decrease, by 2040, DAC will release its negative emission potential, playing a crucial role in achieving net zero or even negative carbon emissions.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100304"},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbonated waste paste calcined clay cement with enhanced CO2 mineralization and early strength","authors":"Qing Liu,&nbsp;Yu Yan,&nbsp;Yuchen Hu,&nbsp;Qiang You,&nbsp;Guoqing Geng","doi":"10.1016/j.ccst.2024.100343","DOIUrl":"10.1016/j.ccst.2024.100343","url":null,"abstract":"<div><div>Modern concrete offers a significant potential for carbon capture, utilization and storage due to their alkaline nature. Herein, we combine the CO₂ mineralization in the waste cement paste (WCP) with calcined clay cement to develop a novel low-carbon cement—carbonated waste paste calcined clay cement (CWPC³). Our results suggest that 1 kg WCP efficiently mineralizes ∼0.27 kg CO₂ within 2 h, and together produces amorphous silica-alumina gel. This carbonated WCP promotes early hydration and strength development due to its high pozzolanic reactivity. Compared with conventional limestone calcined clay cement (LC³), CWPC³ has higher early strength and lower embodied carbon. Our work provides a synchronized solution to treat WCP while reducing embodied carbon in construction materials.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100343"},"PeriodicalIF":0.0,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}