Carbon Capture Science & Technology最新文献

{"title":"CO2 reduction by chars obtained by pyrolysis of real wastes: Low temperature adsorption and high temperature CO2 capture","authors":"N. Miskolczi ,&nbsp;N. Gao ,&nbsp;C. Quan ,&nbsp;A.T. Laszlo","doi":"10.1016/j.ccst.2024.100332","DOIUrl":"10.1016/j.ccst.2024.100332","url":null,"abstract":"<div><div>In this work, the carbon dioxide capture of waste derived chars was investigated. The char samples were obtained by pyrolysis of municipal plastic waste, biomass and sewage sludge from agriculture at 400, 600 and 900 °C in nitrogen atmosphere. For further experiments, chars with a grain size between 0.315 mm and 1.50 mm were investigated. The CO₂ uptake capacity of samples was tested at 40 °C through a 10 adsorption-desorption cycles using a mixture of 70 % nitrogen and 30 % carbon dioxide. The CO₂ uptake capacity of the reference activated carbon was 3.71–3.90 mmol CO₂/g, while that of the waste derived char samples varied between 0.76–2.33 mmol CO₂/g depending on the pyrolysis temperature and the raw materials. Chars with large specific surface area obtained at 900 °C had the highest CO₂ uptake capacity. Char obtained from municipal plastic waste at a pyrolysis temperature of 900 °C has the largest specific surface area. The biomass and sewage sludge derived chars contained alkali metals and earth metals in oxide form, therefore the possibility of their application for carbonization-calcination cycles was also investigated. In case of the high-temperature tests, the CO₂ uptake took place at 750 °C, while the release at 900 °C. During the 10 cycles test, significant decrease in capacity up to the 5th cycle was found. The capacity of char obtained from agricultural sewage sludge was 18.68 mmol CO₂/g in the first cycle, which decreased drastically to 2.88–2.96 mmol CO₂/g after the 5th cycle.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100332"},"PeriodicalIF":0.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697770","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":"Synthesis and optimization of 3D porous polymers for efficient CO2 capture and H2 storage","authors":"Rawan A. Al-Qahtani ,&nbsp;Mahmoud M. Abdelnaby ,&nbsp;Ismail Abdulazeez ,&nbsp;Othman Charles S. Al-Hamouz","doi":"10.1016/j.ccst.2024.100330","DOIUrl":"10.1016/j.ccst.2024.100330","url":null,"abstract":"<div><div>In this study, a new porous organic polymer (KFUPM-CO₂) with intrinsic nitrogen atoms as active sites for CO₂ capture was optimized and synthesized via Friedel-Crafts alkylation of triptycene and 2,2-bipyridine. The porous polymer shows a high surface area of 1100 m²/g with a tuned microporosity of less than 1.2 nm, confirmed by NLDFT. KFUPM-CO₂ showed a remarkable CO₂ sorption capacity of 5.6 mmol/g at 273 K, 3.2 mmol/g at 298 K, and a pressure of 760 mmHg KFUPM-CO₂ showed a high enthalpy of adsorption of 43.7 kJ/mol for CO₂ with IAST selectivity of CO₂/N₂ of 127 at 273 K and 97 at 298 K on simulated flue gas composition. Additionally, KFUPM-CO₂ exhibited an H₂ storage capacity of 1.5 wt. % at 77 K and 860 mmHg Grand Canonical Monte Carlo (GCMC) simulations further revealed that KFUPM-CO₂ was mainly stabilized by π-π intra-molecular interactions, and exhibited strong van der Waals attractions to CO₂ molecules via the pyridyl nitrogen atoms, resulting in the rapid uptake. The combined advantages of binding 2,2-bipyridine with triptycene provided a robust porous polymer with abundant nitrogen sites, permanent porosity, and thermal stability, rendering KFUPM-CO₂ an excellent candidate for CO₂ capture and H₂ storage technologies.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100330"},"PeriodicalIF":0.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571480","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":"Benchmarking heat-driven adsorption carbon pumps (HACP): A thermodynamic perspective","authors":"Shuangjun Li ,&nbsp;Lijin Chen ,&nbsp;Shuai Deng ,&nbsp;Xiangkun Elvis Cao ,&nbsp;Xiaolin Wang ,&nbsp;Ki Bong Lee","doi":"10.1016/j.ccst.2024.100331","DOIUrl":"10.1016/j.ccst.2024.100331","url":null,"abstract":"<div><div>Benchmarking is pivotal in standardizing industrial devices, leading to notable performance enhancements in fields such as heating pump air conditioning, photovoltaic devices, and more. The significance of treating the CO₂ capture system in small/medium size was emphasized in this work as a standalone device from a thermodynamic perspective, which facilitates the creation of a comprehensive benchmarking methodology. In this study, we studied the heat-driven adsorption carbon pump (HACP) as a typical case for benchmarking. The benchmarking methodology proposed is structured through a five-step process: defining boundaries, determining indicators, establishing calculation processes, collecting and analyzing data, and ultimately evaluating and optimizing performance. By utilizing thermodynamic principles, the energy efficiency of HACP devices was assessed. Through the combination of standardized tests and theoretical calculations, this work enables a quantitative evaluation of energy consumption and the thermodynamic perfection of specific HACP devices.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100331"},"PeriodicalIF":0.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593571","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":"Pore-scale study of CO2 desublimation in a contact liquid","authors":"Timan Lei ,&nbsp;Geng Wang ,&nbsp;Junyu Yang ,&nbsp;Jin Chen ,&nbsp;Kai H. Luo","doi":"10.1016/j.ccst.2024.100329","DOIUrl":"10.1016/j.ccst.2024.100329","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Cryogenic carbon capture (CCC) designed to operate in a contact liquid is an innovative technology for capturing &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; from industrial flue gases, helping mitigate climate change. Understanding &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; desublimation properties in a contact liquid is crucial to optimizing CCC, but is challenging due to the complex physics involved. In this work, a multiphysics lattice Boltzmann (LB) model is developed to investigate &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; desublimation in a contact liquid for various operating conditions, with the multiple and fully-coupled physics being incorporated (i.e., two-phase flow, heat transfer across three phases, &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; transport between the gas and liquid, homogeneous and heterogeneous desublimation of &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;, and solid &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; generation). The &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; desublimation process in a contact liquid is well reproduced. Moreover, parametric studies and quantitative analyses are set out to identify optimal conditions for CCC. The decreasing liquid temperature (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) and flue gas temperature (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) are found to accelerate the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; desublimation rate and enhance the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; capture velocity (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;). However, excessively low &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; values should be avoided. These conditions increase the energy consumption of cooling while only marginally improving &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;, due to the limited &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; supply. The CCC system performs effectively when purifying flue gases with high &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; content (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;Y&lt;/mi&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;). This is because the large &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;Y&lt;/mi&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; accelerates the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; desublimation rate and enhances the overall &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO&lt;/mtext&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; capture efficiency. A high gas injection velocity (or &lt;span&gt;&lt;math&gt;&lt;mtext&gt;Pe&lt;/mtext&gt;&lt;/math&gt;&lt;/span&gt;) is beneficial for amplifying &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; by increasing the gas–liquid interfaces and enhancing the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mtext&gt;CO","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100329"},"PeriodicalIF":0.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571482","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":"Advancing the deployment and information management of direct air capture: A solution enabled by integrating consortium blockchain system","authors":"Zihan Chen ,&nbsp;Yiyu Liu ,&nbsp;Eryu Wang ,&nbsp;Huajie You ,&nbsp;Qi Gao ,&nbsp;Fan David Yeung ,&nbsp;Jia Li","doi":"10.1016/j.ccst.2024.100300","DOIUrl":"10.1016/j.ccst.2024.100300","url":null,"abstract":"<div><div>Direct air capture (DAC) is a critical and emerging Negative Emissions Technology (NET) that directly removes CO2 from the atmosphere, significantly contributing to climate change. However, the deployment and management of large-scale DAC faces challenges such as collections and analysis of energy consumption data, intricate device and system management, emission prediction and operation strategy, precise carbon footprint tracking, etc. This paper proposes the integration of blockchain technology with DAC systems to address these challenges, utilizing blockchain's inherent properties of immutability, security, and transparency. The implementation strategy includes the development of a DAC consortium blockchain system, leveraging a consensus mechanism,<span><span>¹</span></span> ECDSA encryption,<span><span>²</span></span> IoT<span><span>³</span></span> integration, and digital signatures. Preliminary modeling of the proposed system suggests potential improvements in operational efficiency and a reduction in data inaccuracies. The proposed system underscores the system's ability to streamline identity verification, improve data collection accuracy, and facilitate secure, confidential information sharing among DAC stakeholders. By enhancing the efficiency and reliability of DAC operations, this approach supports the scalable and effective deployment of NETs in the global effort to combat climate change. Future research will focus on empirical validation through pilot projects and simulations to further substantiate these claims.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100300"},"PeriodicalIF":0.0,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593569","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":"Offshore carbon storage from power plants based on real option and multi‐period source‐sink matching: A case study in the eastern coastal China","authors":"Xingyu Zan ,&nbsp;Panjie Ji ,&nbsp;Yuxuan Ying ,&nbsp;Long Jiang ,&nbsp;Xiaoqing Lin ,&nbsp;Angjian Wu ,&nbsp;Qi Lu ,&nbsp;Qunxing Huang ,&nbsp;Xiaodong Li ,&nbsp;Jianhua Yan","doi":"10.1016/j.ccst.2024.100314","DOIUrl":"10.1016/j.ccst.2024.100314","url":null,"abstract":"<div><div>Carbon capture utilization and storage (CCUS) emerges as a pivotal strategy for CO₂ reduction in the power sector, particularly focusing on the overlooked domain of offshore storage along China's east coast. In spite of the potential high costs, irreversible investments, and lengthy development, offshore storage can still be prospective. Considering autonomous decision-making among emission sources, this study pioneers a CO₂ offshore storage investment decision model tailored for coal-fired and gas-fired power plants. Innovating an offshore storage source-sink matching model with a real options model and introducing a pipeline network optimization model allows a realistic source-sink matching strategy to be explored under optimal investment timing. According to the results, among 154 large stationary emission sources in Zhejiang Province, offshore storage could reduce CO₂ emissions by 4.59 Gt, utilizing the Qiantang, Minjiang, and Fuzhou depressions. It is economically feasible to implement offshore storage with a whole-process unit cost of 368.8 CNY/t_CO2, mainly dominated by capture costs. A hybrid carbon tax-subsidy policy promotes carbon reduction and economic benefits, offering a more effective incentive for emission sources to invest in offshore storage than a single policy. At a hybrid policy price of 250 CNY/t_CO2, all 27 selected emission sources are projected to invest in offshore storage by 2048, with a preference for the Qiantang depression as the storage site. Practically, this study provides important technical support and guidance for the large-scale deployment of offshore storage.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100314"},"PeriodicalIF":0.0,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446515","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":"Immobilized heterogeneous catalysts for CO2 hydrogenation to formic acid: A review","authors":"Hongwei Li ,&nbsp;Bo Peng ,&nbsp;Shuaishuai Lv ,&nbsp;Qiuming Zhou ,&nbsp;Zhennan Yan ,&nbsp;Xuebin Luan ,&nbsp;Xuandong Liu ,&nbsp;Congcong Niu ,&nbsp;Yanfang Liu ,&nbsp;Jili Hou ,&nbsp;Zhiqiang Wang ,&nbsp;Ying Chen ,&nbsp;Binhang Yan ,&nbsp;Zhigang Tang ,&nbsp;Chaopeng Hou ,&nbsp;Kang Qin ,&nbsp;Yu Wu ,&nbsp;Run Xu","doi":"10.1016/j.ccst.2024.100322","DOIUrl":"10.1016/j.ccst.2024.100322","url":null,"abstract":"<div><div>Formic acid is a promising hydrogen storage medium that can be produced via the catalytic hydrogenation of CO₂. Compared with heterogeneous catalysts, homogeneous catalysts composed of organic metal complexes, especially Ru- and Ir-based catalysts, show higher activity and selectivity for the catalytic reaction of CO₂ hydrogenation to formic acid; however, it is difficult to separate them from the reaction products. Heterogeneous catalysts prepared by immobilizing metal complexes onto solid materials demonstrate high activity and selectivity, similar to homogeneous catalysts, and solve the problem of catalyst separation. For preparing such catalysts, the choice of support is particularly important because effective anchoring is the key to realize catalyst recycling. Supported heterogeneous catalysts are mainly based on inorganic oxides and porous polymers (e.g., metal-organic frameworks, covalent organic frameworks, and organic polymers). This review comprehensively examines the advancements in immobilized heterogeneous catalysts for the hydrogenation of CO₂, focusing on support materials, reaction mechanisms, catalyst immobilization conditions, and the impact of various reaction conditions on catalytic performance. Furthermore, we provide a comparative analysis of immobilized catalysts and their homogeneous counterparts, underlining the advantages of site isolation and the role of support materials in enhancing catalytic activity. The design and development of immobilized heterogeneous catalysts are important in the field of CO₂ hydrogenation to formic acid because of their abundant active sites, excellent catalytic stability, flexible chemical modifiability, and low preparation cost. We conclude with perspectives on future research directions, emphasizing the need for innovative catalyst designs and optimization of reaction conditions to achieve sustainable and economically viable CO₂ hydrogenation processes.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100322"},"PeriodicalIF":0.0,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418419","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":"Mass granulation of Al-promoted CaO-based sorbent via moulding-crushing methods for cyclic CO2 capture","authors":"Tao Jiang ,&nbsp;Joe Yeang Cheah ,&nbsp;Zetong Liu ,&nbsp;Zhaojie Fang ,&nbsp;Xinyi Guan ,&nbsp;Yue Wang ,&nbsp;Shengping Wang ,&nbsp;Xinbin Ma","doi":"10.1016/j.ccst.2024.100321","DOIUrl":"10.1016/j.ccst.2024.100321","url":null,"abstract":"<div><div>Calcium looping (CaL) process, as an effective way to achieve CO₂ mitigation from high-temperature flue gas streams, is one of the most promising alternatives to amine scrubbing (a well-established technology for industrial post-combustion CO₂ capture). CaO sorbent is considered to be an ideal CO₂ adsorption material. Moreover, the development of granulation/pelletization techniques along with the mass preparation of the CaO-based sorbent is imperative for realistic large-scale applications. This work proposes two practicable moulding-crushing techniques for the scale-up granulation of CaO-based sorbents, in which the kilogram-scale produced Al-promoted CaO-based sorbent powders were first moulded and subsequently crushed into the granules of target sizes. Three types of organic acids–acetic acid, citric acid and malonic acid were employed as peptizing agents to optimize the granulation process. As a result, the anti-attrition properties and compressive strength of the synthetic sorbents were elevated owing to the introduction of an appropriate amount of acetic or malonic acid, for it expedited the disintegration of the pseudo-boehmite (served as binder agent) particles into sol particles, which allowed for tighter bonding of sorbent particles. In addition, corncob powder acted as a pore-forming agent, enhancing the porous structure of the sorbent particles due to the gases released from the thermal decomposition of organic groups during calcination. Nevertheless, the results revealed that the porous and loose structure adversely affected the mechanical strength of the granules.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100321"},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418421","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":"Available data and knowledge gaps of the CESAR1 solvent system","authors":"Diego Morlando ,&nbsp;Vanja Buvik ,&nbsp;Asmira Delic ,&nbsp;Ardi Hartono ,&nbsp;Hallvard F. Svendsen ,&nbsp;Hanne M. Kvamsdal ,&nbsp;Eirik F. da Silva ,&nbsp;Hanna K. Knuutila","doi":"10.1016/j.ccst.2024.100290","DOIUrl":"10.1016/j.ccst.2024.100290","url":null,"abstract":"<div><div>Amine-based chemical absorption stands out as the leading technology for post-combustion CO₂-capture. A blend of 3 M 2-amino-2-methyl-1-propanol (AMP) and 1.5 M piperazine (PZ), also known as CESAR1, has proven to outperform the current benchmark ethanolamine (MEA), exhibiting better energy performance and lower degradation rates. This review aims to gather all the experimental laboratory and pilot available data for CESAR1 and its constituent components. Experimental gaps to develop reliable process models are detected and future experiments are proposed. An overview of the knowledge related to amine and degradation compound emissions and environmental impacts of CESAR1, together with hands-on experience in operating the solvent, is presented in this review.</div><div>The main findings of the review are that sufficient physical properties, N₂O-solubility, and speciation data for the CESAR1 solvent are not available in the open literature, even though necessary for the development of reliable process models. A review of the degradation compounds for AMP, PZ and AMP/PZ blends outlines that the nitrogen balance for AMP and PZ is not closed, meaning that there still are compounds that need identification and quantification in the degraded solvent. Given the higher volatility of AMP compared to MEA, a better understanding of the formation and behaviour of aerosol and gas phase emissions is required. A review of pilot plant campaigns for AMP/PZ blends shows that CESAR1 performs better in terms of energy compared to MEA and degrades less. There is, however, the need for high-quality pilot campaigns where all data needed for process model validation is provided for the scientific community. Finally, amine emission mitigation strategies and data on the environmental impact and toxicity of AMP and PZ are presented and discussed.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100290"},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418417","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":"Synergizing black gold and light: A comprehensive analysis of biochar-photocatalysis integration for green remediation","authors":"Iltaf Khan ,&nbsp;Samreen Sadiq ,&nbsp;Ping Wu ,&nbsp;Muhammad Humayun ,&nbsp;Sami Ullah ,&nbsp;Waleed Yaseen ,&nbsp;Sikandar Khan ,&nbsp;Abbas Khan ,&nbsp;Rasha A. Abumousa ,&nbsp;Mohamed Bououdina","doi":"10.1016/j.ccst.2024.100315","DOIUrl":"10.1016/j.ccst.2024.100315","url":null,"abstract":"<div><div>Biochar is a porous, high-surface-area, black carbon-rich product that offers a cost-effective and environmentally friendly option to replace conventional charcoal. However, its specific structure and limited biodegradability pose challenges for its widespread applications. Photocatalysis is suggested as an alternative approach to harness solar energy and transform it into solar fuels. Interestingly, nanomaterials-based photocatalysts with tailored energy band properties and non-toxic characteristics, high surface areas, enhanced stability, and tunable pore sizes, have gained attention for their potential in diverse applications. Therefore, existing research on biochar-based photocatalysis systems (BBPs) aims to address different environmental issues. Interestingly, BBPs offer benefits such as excellent electrical conductivity, versatile functional groups, large surface area, and multiple surface-active sites, promoting high charge mobility, electron reservoir, superior charge separation, and small bandgap. This review provides a comprehensive overview of BBPs developments, including synthesis methods and properties. The fusion of BBPs is used in CO₂ conversion, photocatalytic H₂ generation, CO₂ reduction, pollutants, dyes, and pharmaceutical degradation. Although the intermarriage of BBPs has potential benefits, their effectiveness may be compromised when modified photocatalysts are incorporated, which may negatively influence carrier generation efficiency and overall performance. Therefore, there is empty room for further research on their physical properties, effectiveness, long-term stability, and reusability of BBPs.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100315"},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418418","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}