Carbon Capture Science & Technology最新文献

{"title":"Breakthroughs in CH4 capture technologies: Key to reducing fugitive methane emissions in the energy sector","authors":"","doi":"10.1016/j.ccst.2024.100316","DOIUrl":"10.1016/j.ccst.2024.100316","url":null,"abstract":"<div><div>A series of negative impacts caused by greenhouse gas emissions have driven mankind to look for a more efficient and economical strategy to reduce emissions. Methane is the second most abundant anthropogenic greenhouse gas, and implementing cost-effective technologies to reduce its emissions is a crucial pathway toward achieving the milestones outlined in the Paris Agreement. The energy sector has a greater potential for methane emission reductions than other sectors, such as (agriculture and waste) with 75 % reductions achievable by 2050 using existing technologies. Capturing and utilizing fugitive methane from the energy sector could offset the cost of emission reductions to some extent. We analyzed existing methane abatement technologies such as leak detection and repair, flaring, technology standards, and methane capture technologies and found that there are well-established solutions for methane leakage at medium and high concentrations. However, capturing methane from low-concentration sources to meet transportation or utilization requirements remains a significant technical challenge, highlighting the need for advances in low-grade methane enrichment technologies. Adsorption technology has been regarded as a promising methodology for methane capture in recent decades due to various advantages such as high flexibility, low capital investment and energy consumption, and a well-established technological framework. This review provides an overview of recent methane emission trends and prevalent methane abatement strategies, offering a brief analysis of the merits and drawbacks associated with existing methane capture technologies for industrial applications. We analyze the current methane emission reduction policies from major economies and identify a gap between proposed policies and practical actions, suggesting that constructing methane detection systems and developing low-concentration methane capture technologies is a key approach to closing the gap.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593570","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":"Thermal characterization and moisture adsorption performance of calcium alginate hydrogel/silica gel/polyvinylpyrrolidone/expanded graphite composite desiccant","authors":"","doi":"10.1016/j.ccst.2024.100323","DOIUrl":"10.1016/j.ccst.2024.100323","url":null,"abstract":"<div><div>Solid desiccant dehumidification system can use low-grade energy for regeneration process and reduce the electrical energy consumption, thus saving energy and reducing carbon emissions. The choice of desiccant can significantly affect the dehumidification performance of the system. In the present study, the composite desiccant was synthesized by adding silica gel (SG), polyvinylpyrrolidone (PVP) and expanded graphite (EG) with calcium alginate hydrogel (CAH) as the matrix, named CAH/SG/EG. Subsequently, the characteristics of the samples were analyzed, and a dehumidification system was built to reveal the effects of different working conditions on the dehumidification performances. The results show that CAH/SG/20 wt.% EG has the optimal adsorption kinetics among all samples. Its moisture adsorption capacity reaches up to 1.009 g/g at 25 °C and 70 % relative humidity (RH), and its adsorption rate is 0.0179 g/(g·min). Especially, its moisture adsorption capacity can still reach 0.44 g/g at 30 % RH, showing a good adsorption capacity at lower RH. Simultaneously, the thermal conductivity of composites gradually increases from 0.449 W/(m·K) to 0.716 W/(m·K) with the addition of EG, increasing by about 60 %. In addition, the dehumidification performance of CAH/SG/20 wt.% EG is higher than that of CAH/SG, and the dehumidification performance of the system shows an ascending, descending and descending trends with the increase of inlet air moisture content, inlet air temperature and inlet air flow, respectively.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578311","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":"CO2 absorption-desorption cycles: Progress, gaps, and future","authors":"","doi":"10.1016/j.ccst.2024.100325","DOIUrl":"10.1016/j.ccst.2024.100325","url":null,"abstract":"<div><div>In order to control global warming and CO₂ emissions to the atmosphere, carbon capture from the carbon production source is considered the short- to midterm solution. The CO₂ absorption-desorption process is recognised as a mature process that has been implemented for many years. However, this process has several weaknesses, such as the considerable energy requirements for regeneration in the desorber unit and degradation of solvent when using amine solutions. In this study, we examine several elements of absorption-desorption cycles for CO₂ capture. This includes modelling, experimentation categorised by the unit operation employed, techno-economic analysis, optimisation, control strategies, and life cycle assessments. It discusses steady-state, dynamic, and data-driven based models, along with a selection of experimental studies conducted at the laboratory scale, detailing solvents used, column characteristics, and equipment specifications. Furthermore, it examines optimisation techniques, techno-economic assessments (TEA), and industrial applications, categorising them into power sectors and industries, and comparing their costs and energy requirements for carbon capture processes. Additionally, different control strategies for absorption-desorption systems are reviewed, compared, and discussed. Life cycle assessments (LCA), focussing on solvents like amine and ammonia, are also explored, with summarised information presented in tables for each aspect of the study. It's essential to highlight the significance of conducting studies on the absorption-desorption cycles for several reasons. Firstly, these studies enable the investigation of amine degradation and the reclaiming of amines, shedding light on crucial aspects of solvent performance. Additionally, absorption-desorption cycle studies provide valuable insights into the energy requirements for solvent regeneration. Ultimately, these studies are crucial in the advancement of more stable solvents, offering the potential to reduce the cost associated with solvent-based carbon capture technologies. This approach optimises important performance metrics such as cyclic capacity, recovery quality, and the purity of the treated stream which are critical parameters for CO₂ absorption-desorption process.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551550","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 of nitrogen-doped mesoporous carbon nanospheres using urea-phenol-formaldehyde resin for efficient CO2 adsorption–desorption studies","authors":"","doi":"10.1016/j.ccst.2024.100302","DOIUrl":"10.1016/j.ccst.2024.100302","url":null,"abstract":"<div><div>Global warming led by excessive CO₂ emission is a significant challenge. CO₂ capture is recognised as an efficient way to mitigate this issue. In this study, we successfully synthesized a series of activation-free nitrogen-doped mesoporous carbon nanospheres (M_x: where x is ratio of urea/phenol) via an aqueous synthesis route, using urea-phenol-formaldehyde resin as a precursor and triblock copolymer F127 as a soft template. These M_x exhibited nitrogen contents ranging from 0.48 % to 1.52 % and with high surface areas within the range of 486.382 to 683.891 m²g⁻¹. Furthermore, they demonstrated a uniform pore channel diameter of around 3.2 nm. The incorporated nitrogen atoms primarily in the forms of pyrrolic, pyridine, and amine groups, offers abundant adsorption sites for CO₂. The CO₂ adsorption and desorption performance of as-synthesized M_x were systematically studied under various CO₂ feed concentrations, including 10 % CO₂ by volume, compressed air (mimicking direct air capture (DAC)), and 10 % CO₂ by volume at 90 % relative humidity, all at 298 K and ∼1 atm. Interestingly, the M_0.1 sample displayed exceptional CO₂ capture performance, achieving a capacity of 2.53 mmol g⁻¹ (or 4.8 mmol m⁻²) at a 10 % CO₂ by volume feed. This outstanding CO₂ adsorption capacity can be attributed to the synergistic effects of ordered mesopore channels, abundant structural micropores, and nitrogen functionalities, facilitating efficient CO₂ adsorption and desorption. Additionally, M_0.1 also displayed high hydrophobicity character, making it ideal for CO₂ adsorption under humid conditions. Moreover, the M_x displayed remarkable stability and recyclability, positioning them as promising and environmentally friendly adsorbents for CO₂ capture and separation under practical operating conditions. Additionally, the proposed M_x does not need any additional alkali activation before application, thus simplifying the implementation process, reducing costs, and complexity.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551549","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":"Assessment of the volatility of amine degradation compounds in aqueous MEA and blend of 1-(2HE)PRLD and 3A1P","authors":"","doi":"10.1016/j.ccst.2024.100326","DOIUrl":"10.1016/j.ccst.2024.100326","url":null,"abstract":"<div><div>Amine-based carbon capture has proven to be a mature technology, but challenges remain. Emission control of potentially hazardous compounds is critical to ensure the long-term viability of the technology. The ability to predict which compounds to expect in gas emissions and at what levels is fundamental. This work aims to provide a qualitative and quantitative assessment of the volatility of both MEA and HS3 blend degradation products. VLE experiments were performed with different degraded solutions over a temperature range from 40 to 100 °C. Samples were analyzed using extensive LC-MS methods to quantify over 40 degradation compounds. Henry's constants were calculated to assess their volatility. The compiled results allow the ranking of most of the compounds studied in terms of volatility, and the quantification of their relative volatility compared to each other. Pyrazines and alkylamines are among the most volatile, followed by aldehydes, ketones, nitrosamines, and finally, larger amides. When compared, the volatilities of the degradation compounds are consistent from one degraded solution to another, highlighting the possibility of generalization from one solvent to another. This consistency is also observed with the dilute version of the degraded solutions simulating water-wash conditions. Finally, this work provides insight into the temperature dependence of the volatilities of the compounds studied. The methodology used provides a valuable and new type of data that have never been published before on the volatility of amine degradation compounds. The results can be used to better understand emissions and the design of emission control technologies.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551547","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":"Towards planetary boundary sustainability of food processing wastewater, by resource recovery & emission reduction: A process system engineering perspective","authors":"","doi":"10.1016/j.ccst.2024.100319","DOIUrl":"10.1016/j.ccst.2024.100319","url":null,"abstract":"<div><div>Meeting the needs of a growing population calls for a change from linear production systems that exacerbate the depletion of finite natural resources and the emission of environmental pollutants. These linear production systems have resulted in the human-driven perturbation of the Earth’s natural biogeochemical cycles and the transgression of environmentally safe operating limits. One solution that can help alleviate the environmental issues associated both with resource stress and harmful emissions is resource recovery from waste. In this review, we address the recovery of resources from food and beverage processing wastewater (FPWW), which offers a synergistic solution to some of the environmental issues with traditional food production. Research on resource recovery from FPWW typically focuses on technologies to recover specific resources without considering integrative process systems to recover multiple resources while simultaneously satisfying regulations on final effluent quality. Process Systems Engineering (PSE) offers methodologies able to address this holistic process design problem, including modelling the trade-offs between competing objectives. Optimisation of FPWW treatment and resource recovery has significant scope to reduce the environmental impacts of food production systems. There is significant potential to recover carbon, nitrogen, and phosphorus resources while respecting effluent quality limits, even when the significant uncertainties inherent to wastewater systems are considered. This review article gives an overview of the environmental challenges we face, discussed within the framework of the planetary boundary, and highlights the impacts caused by the agri-food sector. This paper also presents a comprehensive review of the characteristics of FPWW and available technologies to recover carbon and nutrient resources from wastewater streams with a particular focus on bioprocesses. PSE research and modelling advances are discussed in this review. Based on this discussion, we conclude the article with future research directions.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551540","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":"Exploiting process thermodynamics in carbon capture from direct air to industrial sources: The paradigmatic case of ionic liquids","authors":"","doi":"10.1016/j.ccst.2024.100320","DOIUrl":"10.1016/j.ccst.2024.100320","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The development of efficient and cost-effective carbon capture (CC) technologies is becoming a crucial challenge for short-term industrial decarbonization strategies and energy transition goals centred on biomethane and biohydrogen production. Nowadays, available CC technologies present main shortcomings for being applied to the huge wide range of CO&lt;sub&gt;2&lt;/sub&gt; partial pressure involved in currently-of-interest industrial CC scenarios (from 0.0004 bar in direct air capture to 13 bar in pre-combustion system: it means five orders of magnitude). Aprotic N-heterocyclic anion-based ionic liquids (AHA-ILs) arise as highly versatile CO&lt;sub&gt;2&lt;/sub&gt; chemical absorbents able to deal with this challenge. In this work, the process thermodynamic limits of the CC based on AHA-IL is explored by estimating the thermodynamic CO&lt;sub&gt;2&lt;/sub&gt; absorption cyclic capacity (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;z&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;mi&gt;y&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;mi&gt;i&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) for four relevant CC industrial systems [inlet CO&lt;sub&gt;2&lt;/sub&gt; partial pressure typical of direct air capture (DAC), post-combustion (post-comb), biogas upgrading (biogas) and pre-combustion (pre-comb)], by means of sensitivity analysis in the literature reported range of key material properties (reaction enthalpy, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mstyle&gt;&lt;mi&gt;Δ&lt;/mi&gt;&lt;/mstyle&gt;&lt;msub&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;: [−15, −100 kJ/mol]; reaction entropy, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mstyle&gt;&lt;mi&gt;Δ&lt;/mi&gt;&lt;/mstyle&gt;&lt;msub&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;: [−0.05, −0.16 kJ/mol⋅K]; Henry constant, &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;: [20, 115 bar]) and process operating conditions (absorption temperature, &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mi&gt;b&lt;/mi&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;: [20, 100 °C]; regeneration temperature, &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;r&lt;/mi&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;mi&gt;g&lt;/mi&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;: [20, 100 °C]; regeneration pressure, &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mi&gt;P&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;r&lt;/mi&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;mi&gt;g&lt;/mi&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt;: [0.01, 0.5 bar]). It is obtained that &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;z&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;mi&gt;y&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;mi&gt;i&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; can be significantly increased by designing AHA-ILs with more negative &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mstyle&gt;&lt;mi&gt;Δ&lt;/mi&gt;&lt;/mstyle&gt;&lt;msub&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mstyle&gt;&lt;mi&gt;Δ&lt;/mi&gt;&lt;/mstyle&gt;&lt;msub&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; values, since reaction exothermicity enhances the absorption stage, whereas unfavourable reaction entropy promotes absorbent regeneration. Physical absorption contribution described by &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; plays a minor role in post-comb and biogas CC systems and becomes highly relevant for pre-comb conditions; surprisingly, DAC process can be enhanced by dec","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551548","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":"Hydrothermal reduction of CO2 captured by aqueous amine solutions into formate: Comparison between in situ generated H2 and gaseous H2 as reductant and evaluation of amine stability","authors":"","doi":"10.1016/j.ccst.2024.100333","DOIUrl":"10.1016/j.ccst.2024.100333","url":null,"abstract":"<div><div>By CO₂ Capture and Utilization technologies (CCU), organic compounds can be produced industrially in a sustainable manner, generating an economic benefit that offsets the cost of CO₂ capture. In this context, the use of CO₂ chemisorbed by amines to generate chemicals is an attractive alternative, given that large-scale facilities using absorption to capture CO₂ are already operational. The aim of this work is to convert CO₂ captured in aqueous amines, specifically 3-amino-1-propanol (AP) and 2-amino-2-methyl-1-propanol (AMP), to produce formate, using either Zn, Al or gaseous H₂ as reductants and Pd/C as catalyst. The highest yield of formate (68 %) was achieved with AP (125 °C, 75 bar, 120 min) using gaseous hydrogen as reductant. Using metals as reductants, reaction yields were lower, with a 12 % yield at 200 °C as the best result. After reduction, NMR analyses show that the amines did not suffer degradation, raising the possibility of reusing them for CO₂ capture in a continuous process. These results indicate that CO₂-loaded amines reduction is a promising CCU technology that can be integrated with the current technologies for gas treatment.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571481","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":"","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":null,"pages":null},"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":"","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":null,"pages":null},"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}