Carbon Capture Science & Technology最新文献

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Ether chain-modified Alkanolguanidine for CO2 capture and subsequent conversion 用于二氧化碳捕获和后续转化的醚链改性烷醇胍
Carbon Capture Science & Technology Pub Date : 2024-08-27 DOI: 10.1016/j.ccst.2024.100284
{"title":"Ether chain-modified Alkanolguanidine for CO2 capture and subsequent conversion","authors":"","doi":"10.1016/j.ccst.2024.100284","DOIUrl":"10.1016/j.ccst.2024.100284","url":null,"abstract":"<div><p>Capturing CO<sub>2</sub> and converting it into valuable chemicals has attracted considerable attention in recent years. Herein, a kind of ether chain-modified alkanolguanidines (ECMAs) was designed and synthesized as a dual functional reagent for carbon dioxide capture and conversion. Due to the presence of basic sites and CO<sub>2</sub>-philic ether chains, these ECMAs demonstrated almost equimolar CO<sub>2</sub> capture at room temperature and atmospheric pressure through the synergy of physical and chemical absorption. Even for diluted CO<sub>2</sub> (15 % CO<sub>2</sub>), 0.7 mol CO<sub>2</sub> per mole capture reagent can still be achieved, showing their potential application in post-combustion capture. The synthesized ECMAs can also serve as catalyst in the cycloaddition reaction of CO<sub>2</sub> with various epoxides, affording 75–99 % yield of corresponding cyclic carbonates under 3 MPa CO<sub>2</sub> with tetrabutylammonium iodide (TBAI) as co-catalyst. Moreover, these ECMAs can be applied to the integrated CO<sub>2</sub> capture and conversion, in which the ECMAs can react with CO<sub>2</sub>, forming the alkyl carbonate zwitterion as active CO<sub>2</sub> species in the capture step. And in the subsequent cycloaddition reaction with propylene oxide, 52 % yield of propylene carbonate was obtained.</p></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772656824000964/pdfft?md5=a4e0d950975545fe40fae3c3a1b9166e&pid=1-s2.0-S2772656824000964-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142084129","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}
引用次数: 0
The mitigation of carbon deposition for Ni-based catalyst in CO2 reforming of methane: A combined experimental and DFT study 甲烷二氧化碳转化过程中镍基催化剂碳沉积的缓解:实验和 DFT 综合研究
Carbon Capture Science & Technology Pub Date : 2024-08-26 DOI: 10.1016/j.ccst.2024.100286
{"title":"The mitigation of carbon deposition for Ni-based catalyst in CO2 reforming of methane: A combined experimental and DFT study","authors":"","doi":"10.1016/j.ccst.2024.100286","DOIUrl":"10.1016/j.ccst.2024.100286","url":null,"abstract":"<div><p>The dry reforming of CH<sub>4</sub> (DRM) reaction can simultaneously convert two greenhouse gases CO<sub>2</sub> and CH<sub>4</sub> into high valued syngas. Nickel-based catalysts have been widely studied because of the low cost and high activity. However, carbon deposition making the deactivation of Ni-based catalyst is the main challenges for DRM reaction. This review illustrates DRM reaction mechanism and the causes of carbon deposition, as well as the resistance strategies of carbon deposition for Ni-based catalyst. The deposited carbon can be restrained by adjusting the size of Ni particles, introduction of promoters, reasonable design of support, controlling the reaction process and employing the confinement effect of the catalysts. The valuable insights are garnered for the further augmentation and optimization of the anti-carbon performance of catalysts by DFT and microkinetic. This work provides a tutorial for designing Ni-based catalysts with high anti-carbon deposition properties for DRM reaction.</p></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772656824000988/pdfft?md5=181ff1ae04cdf3d365c16d3cf7543e91&pid=1-s2.0-S2772656824000988-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142077032","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}
引用次数: 0
Interdisciplinary challenges in bio-energy carbon capture utilization & storage deployment: A review 生物能源碳捕集利用与封存部署中的跨学科挑战:综述
Carbon Capture Science & Technology Pub Date : 2024-08-26 DOI: 10.1016/j.ccst.2024.100283
{"title":"Interdisciplinary challenges in bio-energy carbon capture utilization & storage deployment: A review","authors":"","doi":"10.1016/j.ccst.2024.100283","DOIUrl":"10.1016/j.ccst.2024.100283","url":null,"abstract":"<div><p>Bioenergy with Carbon Capture, Utilization, and Storage (BECCUS) is an innovative technology that has the potential to contribute significantly to global climate change mitigation efforts by simultaneously removing atmospheric carbon dioxide through the process of biomass growth and combustion and generating sustainable energy in the form of electricity or fuel. This study systematically reviews existing research literature to identify the strengths and barriers to implementing BECCUS technology and explore potential countermeasures. The review revealed that BECCUS faces technological, socio-behavioral, policy-related, and financial issues that hinder its large-scale application. To address these challenges, the study highlights the need for further research to upscale BECCUS technology, dialogue, and participation among relevant stakeholders to improve public acceptance, and reforms to address regulatory bottlenecks in BECCUS project policies. The findings suggest that a multi-faceted approach, involving stakeholder engagement and policy reforms, is necessary to create an environment that fosters the advancement of current BECCUS technology and its optimal use in combating climate change, underlining the broader significance of this technology in the pursuit of a sustainable future. Effective stakeholder engagement can help identify and address the social, economic, and environmental concerns related to BECCUS, while targeted policy reforms can provide the necessary incentives and regulatory framework to support the development and deployment of this BECCUS.</p></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772656824000952/pdfft?md5=2aaf9f00081fd74d7a7c10f703316005&pid=1-s2.0-S2772656824000952-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142077031","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}
引用次数: 0
Tunable protic ionic liquid catalysts for the efficient one-step synthesis of isosorbide-based polycarbonates 一步法高效合成异山梨醇基聚碳酸酯的可调原生离子液体催化剂
Carbon Capture Science & Technology Pub Date : 2024-08-23 DOI: 10.1016/j.ccst.2024.100281
{"title":"Tunable protic ionic liquid catalysts for the efficient one-step synthesis of isosorbide-based polycarbonates","authors":"","doi":"10.1016/j.ccst.2024.100281","DOIUrl":"10.1016/j.ccst.2024.100281","url":null,"abstract":"<div><p>Using CO<sub>2</sub>-derived dimethyl carbonate (DMC) instead of diphenyl carbonate (DPC) as a carbonyl source for synthesizing bio-based polycarbonates is a green and cost-effective route. However, the synthesis of high-performance polycarbonates via the DMC route remains challenging due to the poor reactivity and selectivity of DMC compared to DPC. Herein, we designed a series of highly active protic ionic liquid (PIL) catalysts for the synthesis of poly(isosorbide carbonate) (PIC) from DMC with ISB. The influences of the structures of anion and cation on the catalytic activity of PILs were systematically studied. Compared with the reported aprotic IL catalysts, the unique reactive hydrogen of the cation in PILs could form a strong hydrogen bond interaction with the carbonyl group of DMC, resulting in higher reactivity of the carbonyl carbon of DMC. Moreover, the nucleophilicity of the anion could be easily tuned by adjusting the p<em>K</em><sub>a</sub> value, which effectively realized the balance of the reactivity difference between <em>exo</em>-OH and <em>endo</em>-OH in ISB. Among them, [DBUH][Im] showed the highest catalytic activity, and the weight-average molecular weight (<em>M</em><sub>w</sub>) and glass transition temperature of PIC reached 55,700 g/mol and 160 °C, respectively. Combined with NMR analyses and DFT calculations, the mechanism that exhibited the synergetic catalytic effect of anion-cation for the polymerization of DMC and ISB was presented.</p></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772656824000939/pdfft?md5=468211dbb1e6db40cc798dfe2b9cca2c&pid=1-s2.0-S2772656824000939-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142049550","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}
引用次数: 0
Study on the reaction mechanism and kinetics of limestone hydrogenation by micro fluidized bed: Effect of H2 concentration and natural limestone 微流化床石灰石加氢反应机理和动力学研究:H2 浓度和天然石灰石的影响
Carbon Capture Science & Technology Pub Date : 2024-08-21 DOI: 10.1016/j.ccst.2024.100271
{"title":"Study on the reaction mechanism and kinetics of limestone hydrogenation by micro fluidized bed: Effect of H2 concentration and natural limestone","authors":"","doi":"10.1016/j.ccst.2024.100271","DOIUrl":"10.1016/j.ccst.2024.100271","url":null,"abstract":"<div><p>Limestone decomposition is the first step in cement production, which produces a significant amount of CO<sub>2</sub> and poses a significant challenge to achieve carbon neutrality. Hydrogenation of limestone can produce CO or CH<sub>4</sub> instead of CO<sub>2</sub>, which can be considered as a new way of carbon capture, making it a promising method for carbon emission reduction. In this work, pure CaCO<sub>3</sub> and several natural limestone samples were hydrolyzed under varying H<sub>2</sub> concentration using a micro fluidized bed (MFB) reactor combined with online mass spectrometry to reveal the mechanism and kinetics of limestone hydrogenation.</p><p>The main gases produced by hydrogenation at 1 atm are CO and CO<sub>2</sub>. The CO<sub>2</sub> comes from the calcination of CaCO<sub>3</sub>. The CO comes from 2 steps: the first step is the in-situ hydrogenation of CaCO<sub>3</sub> and the second step is the Reverse Water Gas Shift (RWGS) reaction. The activation energy (Ea) of CO<sub>2</sub> formation in H<sub>2</sub> atmosphere is lower than in Ar atmosphere. However, there is no obvious effect of different H<sub>2</sub> concentrations on the Ea of CO<sub>2</sub> formation. The Ea of CO in situ formation is 72.70 KJ/mol, 54.53 KJ/mol, 71.34 KJ/mol and 60.29 KJ/mol in 10%, 30%, 50% and 70% H<sub>2</sub> atmosphere, respectively. The H<sub>2</sub> concentration also has no significant effect on the in-situ CO evolution. However, the H<sub>2</sub> concentration can affect the Ea of CO produced by RWGS. The Ea is 75.67 KJ/mol, 167.59 KJ/mol and 221.47 KJ/mol in 10%, 30% and 50% H<sub>2</sub> atmosphere, and this reaction doesn't occur in 70% H<sub>2</sub> atmosphere. Compared with the pure CaCO<sub>3</sub>, the hydrogenation of limestone can produce more CO and less CO<sub>2</sub>. In limestone, impurity elements are the main factor affecting the reaction kinetics. Transition metals can increase the rate of CO<sub>2</sub> production, but have no apparent effect on CO. The CO<sub>2</sub> yield of high impurity limestone is higher than that of limestone with low impurities. Transition metals can also reduce the Ea of CO<sub>2</sub> formation and the RWGS reaction. In the 50% H<sub>2</sub> atmosphere, the Ea of CO<sub>2</sub> formation is 88.87 KJ/mol and the Ea of CO from RWGS is 137.60 KJ/mol. However, under the same conditions, the Ea of pure CaCO<sub>3</sub> is 126.91 KJ/mol and 221.47 KJ/mol.</p></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772656824000836/pdfft?md5=055744661ea5d7553e1b58887d705764&pid=1-s2.0-S2772656824000836-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021476","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}
引用次数: 0
Poly(ionic liquid) composite membranes bearing different anions as biocatalytic membranes for CO2 capture 含不同阴离子的聚(离子液体)复合膜作为二氧化碳捕获的生物催化膜
Carbon Capture Science & Technology Pub Date : 2024-08-19 DOI: 10.1016/j.ccst.2024.100269
{"title":"Poly(ionic liquid) composite membranes bearing different anions as biocatalytic membranes for CO2 capture","authors":"","doi":"10.1016/j.ccst.2024.100269","DOIUrl":"10.1016/j.ccst.2024.100269","url":null,"abstract":"<div><p>The enzyme carbonic anhydrase (CA) has gainned considerable attention from the literature and the industry in the context of CO<sub>2</sub> capture. CA immobilization in gas-liquid membrane contactors, and more specifically, on poly(ionic liquid) (PIL) composite membranes has been demonstrated to be a potential strategy to facilitate its industrial implementation. These membranes were comprised of a PIL layer coating on a porous hydrophobic polymeric support. In this work, the composition of the PIL layer was tuned by anion exchange to yield a variety of enzyme carriers. The following anions were compared: bromide [Br], acetate [Ac], tetrafluoroborate [BF<sub>4</sub>], and bis(trifluoromethylsulfonyl)imide [NTf<sub>2</sub>]. The surface morphology, chemistry, and properties of these composite membranes were characterized by SEM, EDX, ATR-FTIR, and water contact angle. The activity of the different biocatalytic composite membranes was determined by the p-nitrophenyl acetate hydrolysis model reaction. It was found that the anion exchange salts had a detrimental effect on the immobilized enzyme activity. In light of these results, the enzyme immobilization step was conducted after anion exchange. The resulting biocatalytic membranes displayed slight differences in immobilized enzyme activities and thermal stabilities following the order [Br]&gt;[BF<sub>4</sub>]&gt;[Ac]&gt;[NTf<sub>2</sub>] and [BF<sub>4</sub>]&gt;[Br]≈[Ac]&gt;[NTf<sub>2</sub>], respectively. The differences were more pronounced and detrimental for the most hydrophobic anion, [NTf<sub>2</sub>]. Parallel trends were noted when the membranes were tested for CO<sub>2</sub> absorption in a gas-liquid membrane contactor set-up suggesting that the CO<sub>2</sub> mass transfer is strongly influenced by the activity of the immobilized enzymes. In addition, the effect of the absorption conditions, i.e., solvent flow rate, solvent saturation, and solvent concentration were evaluated. Under the best conditions, the novel biocatalytic membranes outperformed the commercial PVDF support by about a factor of 4 in terms of overall mass transfer coefficient. Such improvement would result in significant reductions in the required membrane area to capture CO<sub>2</sub> by a gas-liquid membrane contactor.</p></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772656824000812/pdfft?md5=c4ec04e73c2a59e0eb4a54d62d2ca500&pid=1-s2.0-S2772656824000812-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142006918","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}
引用次数: 0
Vacuum assisted desorption of sodium zirconate sorbent for enhancing cyclic stability in pre-combustion CO2 capture 真空辅助解吸锆酸钠吸附剂以提高燃烧前二氧化碳捕获的循环稳定性
Carbon Capture Science & Technology Pub Date : 2024-08-16 DOI: 10.1016/j.ccst.2024.100277
{"title":"Vacuum assisted desorption of sodium zirconate sorbent for enhancing cyclic stability in pre-combustion CO2 capture","authors":"","doi":"10.1016/j.ccst.2024.100277","DOIUrl":"10.1016/j.ccst.2024.100277","url":null,"abstract":"<div><p>Sodium zirconate (Na<sub>2</sub>ZrO<sub>3</sub>) is a promising material for pre-combustion CO<sub>2</sub> capture due to its fast sorption kinetics and excellent cyclic stability at high temperatures under ideal condition (desorption in 100% N<sub>2</sub>). Still, there is a lack of study on the performance of Na<sub>2</sub>ZrO<sub>3</sub> cyclic capture under harsh condition (desorption in high concentration CO<sub>2</sub>). In this study, Na<sub>2</sub>ZrO<sub>3</sub> was prepared by wet-mixing and heated-drying, and the difference in the cyclic CO<sub>2</sub> capture performance of the sample was compared between desorption under harsh condition and vacuum condition. The crystal structure of Na<sub>2</sub>ZrO<sub>3</sub> was identified during the sorption-desorption cycles. The crystal structure was also modeled and simulated to analyze the reason for the superior capture performance from the monoclinic Na<sub>2</sub>ZrO<sub>3</sub>. It was found that the special interlocked and multilayered stacked structure of the monoclinic Na<sub>2</sub>ZrO<sub>3</sub> allowed for high reactivity with CO<sub>2</sub>. It was found that high temperature solely had little help in the desorption of Na<sub>2</sub>ZrO<sub>3</sub> under harsh condition, but vacuum condition promoted desorption of Na<sub>2</sub>ZrO<sub>3</sub> in high fraction CO<sub>2</sub>, and vacuum desorption at 1000 °C-1050 °C resulted in Na<sub>2</sub>ZrO<sub>3</sub> with both good capture performance and cycling stability. Vacuum desorption led to more complete reversion of Na<sub>2</sub>ZrO<sub>3</sub> to the monoclinic state, benefiting for CO<sub>2</sub> capture. This study attempted to simulate the harsh capture environments of real industrial applications and to explore the possibility of Na<sub>2</sub>ZrO<sub>3</sub> as a carbon capture material for pre-combustion capture.</p></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772656824000897/pdfft?md5=cc7b20c2ed225f2ebcbdc4f175db6ee8&pid=1-s2.0-S2772656824000897-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141992687","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}
引用次数: 0
Polyethyleneimine coated AgInS2 quantum dots for efficient CO2 photoreduction to C2H6 聚乙烯亚胺涂层 AgInS2 量子点用于高效 CO2 光还原为 C2H6
Carbon Capture Science & Technology Pub Date : 2024-08-16 DOI: 10.1016/j.ccst.2024.100272
{"title":"Polyethyleneimine coated AgInS2 quantum dots for efficient CO2 photoreduction to C2H6","authors":"","doi":"10.1016/j.ccst.2024.100272","DOIUrl":"10.1016/j.ccst.2024.100272","url":null,"abstract":"<div><p>Quantum dots exhibit great potential in photocatalytic CO<sub>2</sub> conversion into value-added fuels to achieve a carbon-neutral society, owing to their unique optical properties and tunable surface chemistry. However, the generation of multi-carbon hydrocarbon products remains a grand challenge. Herein, polyethyleneimine (PEI) coated AgInS<sub>2</sub> quantum dots (AgInS<sub>2</sub>@PEI QDs) are designed for the photo-catalytic conversion of CO<sub>2</sub> to C<sub>2</sub> products. It is found that the yield and selectivity of C<sub>2</sub>H<sub>6</sub> can be significantly enhanced by regulating the content of Ag and PEI in AgInS<sub>2</sub>@PEI QDs. Under the optimal conditions, C<sub>2</sub>H<sub>6</sub> yield reaches 63 μmol g<sup>-1</sup>, and the electron selectivity is 30.3 %. A mechanistic study reveals that PEI effectively promotes the accumulation of photogenerated electrons, and the CO-enriched local environment caused by Ag boosts C<img>C coupling on asymmetric bimetallic sites. This work offers new insight on the design of efficient quantum dot photocatalysts for CO<sub>2</sub> conversion to C<sub>2</sub> products.</p></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772656824000848/pdfft?md5=573f56abdb40eb17fc84f564b6c9d7a6&pid=1-s2.0-S2772656824000848-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141993146","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}
引用次数: 0
Carbon dioxide capture in sodium carbonate solution: Mass transfer kinetics and DTAC surfactant enhancement mechanism 碳酸钠溶液中的二氧化碳捕获:传质动力学和 DTAC 表面活性剂的增强机制
Carbon Capture Science & Technology Pub Date : 2024-08-16 DOI: 10.1016/j.ccst.2024.100270
{"title":"Carbon dioxide capture in sodium carbonate solution: Mass transfer kinetics and DTAC surfactant enhancement mechanism","authors":"","doi":"10.1016/j.ccst.2024.100270","DOIUrl":"10.1016/j.ccst.2024.100270","url":null,"abstract":"<div><p>Sodium carbonate solvent absorbent has been widely studied for CO<sub>2</sub> reduction to deal with global warming because of its green, low cost, and non-corrosive advantages. However, in the application of sodium carbonate as an absorbent for CO<sub>2</sub> capture, there is no unified cognition of the mass transfer process, which leads to the lack of guidance for the industrial large-scale process. Moreover, the mechanism of mass transfer enhancement of surfactants, which can effectively improve the mass transfer performance, has not been effectively explored in the literature. Based on this, this paper firstly adopts the molecular dynamics method to analyze the solution characteristics after surfactant addition and optimize the surfactant. Subsequently, a classical dissolved oxygen test method was used to measure the gas-liquid mass transfer coefficient for CO<sub>2</sub> absorption into sodium carbonate solution. And based on this mass transfer coefficient measurement method, the mass transfer process of sodium carbonate solution with surfactant was analyzed. The results showed that the sodium carbonate solution with 5 wt% concentration and 10 wt% concentration at 30 °C did not satisfy the pseudo first-order fast chemical reaction kinetics assumption. To improve CO<sub>2</sub> absorption mass transfer rate, dodecyl trimethyl ammonium chloride (DTAC) surfactant was introduced, which was improved by 119 % compared with non-enhanced solvent at 5 wt% concentration solution, and the assumption of pseudo first order fast chemical reaction was satisfied. After the introduction of surfactant, the barrier effect decreased the liquid phase mass transfer coefficient, but the Marangoni effect happened in the 5 wt% concentration of sodium carbonate solution, which enhanced the liquid-phase mass-transfer coefficient. This finding reveals the mechanism of mass transfer promotion of sodium carbonate by the surfactant DTAC, which is of great engineering significance for the application in the field of decarbonization after the introduction of surfactant.</p></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772656824000824/pdfft?md5=3d7cd906eec73fe0e741827795a124e2&pid=1-s2.0-S2772656824000824-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141993147","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}
引用次数: 0
Aerosol emissions and mitigation of aqueous AMP/PZ solvent for postcombustion CO2 capture 用于燃烧后二氧化碳捕获的 AMP/PZ 水溶液的气溶胶排放和缓解措施
Carbon Capture Science & Technology Pub Date : 2024-08-16 DOI: 10.1016/j.ccst.2024.100273
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