共查询到19条相似文献,搜索用时 62 毫秒
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二氧化碳是主要的温室气体之一,其大量排放已对全球的气候环境造成严重影响,迫切需要开发经济有效的碳捕集技术。目前,碳捕集技术主要有吸收分离法、吸附分离法、膜分离法和低温分离法。首先,介绍了碳捕集技术的发展现状、应用研究进展和未来发展趋势;总结了国内外碳捕集示范项目;重点对比了各碳捕集技术的优势与缺点,同时强调了捕集技术面临的困难与挑战;指出目前主要的碳捕集技术均难以独立实现高效、节能、经济的碳捕集分离,需针对不同的应用场景,选择适合的分离技术,并提出了适用分离场景的应用建议;最后,简要介绍了混合捕集技术的研究成果,提出混合捕集技术可能是一种突破单一捕集技术瓶颈的可行方法。 相似文献
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在“碳达峰、碳中和”的双重任务下,CO2捕集已经成为今后工业发展的必然趋势。分别介绍了燃烧前捕集、燃烧后捕集以及富氧燃烧技术,并总结了相关技术还存在的问题。同时,系统地总结了国内外主要的CO2捕集方法,分析了不同捕集方法的优缺点,并针对不同行业提出了合理的捕集方法。其中,重点介绍了溶液吸收法,通过对现有吸收液存在的能耗高、易挥发、毒性大的问题,提出了今后溶液吸收法的主要发展方向,并针对现有吸附法存在的问题提出开发新型低温、低压、低成本的固体吸附材料及相关工艺的研究思路。 相似文献
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高凡翔;刘阳;张贵泉;秦锋;姚建涛;金辉;师进文 《化工进展》2024,43(5):2324-2342
燃煤烟气中SO2和CO2的处理逐渐向协同脱除方向发展,基于湿法脱硫和脱碳的组合技术因此获得了广泛关注。本文首先系统梳理了梯级(依次)脱硫脱碳技术的重点研究方向,认为SO2的胺降解作用是该类技术面对的核心问题,但其影响机理尚未形成统一共识。从控制排放和预防降解两个角度出发,分析了强化脱硫技术和胺降解抑制剂对缓解SO2不利影响的作用。与梯级处理相比,联合(同步)脱硫脱碳技术可基于单一溶剂实现循环吸收-解吸。然后总结了钙法、氨法、胺法等联合脱硫脱碳(联脱)技术的最新进展,梳理并对比了各类吸收体系的原理和工艺设计,其中基于氨水的联脱工艺研究最为成熟。还简述了两类协同脱除技术的优缺点和发展前景。最后,建议对于梯级脱硫脱碳技术未来应重点关注SO2的胺降解机理及其在开发预防降解措施中的作用,对于联脱技术应加强反应理论和集成工艺建模研究等。 相似文献
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高效经济地消除燃煤烟气中的SO2和CO2对生态环境具有重要意义,但开发具有高捕集能力、高选择性和良好稳定性的吸附剂仍然是一个挑战。本文通过靛红与芳香族单体(三蝶烯)在超酸性条件下反应得到了性质稳定的有机多孔聚合物吸附剂PPN-1,并对PPN-1季胺化以及离子交换获得离子型多孔聚合物PPN-1-OH。由于两种有机多孔吸附剂拥有合适的BET表面积、丰富的微孔孔道以及大量的富电子基团,PPN-1和PPN-1-OH对SO2和CO2具有很强的亲和力。尤其是离子型有机多孔聚合物PPN-1-OH显示出超高的静态吸附能力,在298K、0.1MPa下其SO2的吸附量高达13.09mmol/g,超过了此前报道的多孔材料。基于瞬时吸附速率,理想吸附溶液理论模拟和固定床穿透实验的研究证明PPN-1-OH具有卓越的SO2动态吸附容量和选择性。在三组分混合气体(SO2/CO2/N2=0.2/9/90.8,体积比)动态固... 相似文献
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燃烧后CO_2捕集技术研究 总被引:1,自引:0,他引:1
对燃烧前、燃烧后CO2捕集以及富氧燃烧3种CO2捕集技术的特点,以及适用于燃煤电厂的燃烧后CO2捕集技术进行了介绍,分析了吸收分离法、吸附分离法和膜分离法的原理及优缺点。其中,化学吸收法应用最广,但再生能耗大,运行成本高;吸附法虽再生能耗小,但对CO2选择性低,吸附能力有限;膜分离法目前仍处于实验室研究阶段,但应用前景巨大。对上述技术整合形成复合技术以及对新材料进行开发将有助于克服现有CCS技术面临的困难。 相似文献
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减少CO2排放是缓解全球变暖的有效途径,如何将CO2从混合气体中捕集并分离是减少CO2排放的前提和基础。文章对国内外的CO2分离技术进行了综合阐述,并分析了各种分离技术的存在的问题,为以后的研究提供方向。 相似文献
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Three gas separation technologies,chemical absorption,membrane separation and pressure swing adsorption,are usually applied for CO2 capture from flue gas in coal-fired power plants.In this work,the costs of the three technologies are analyzed and compared.The cost for chemical absorption is mainly from $30 to $60 per ton(based on CO2 avoided),while the minimum value is $10 per ton(based on CO2 avoided).As for membrane separation and pressure swing adsorption,the costs are $50 to $78 and $40 to $63 per ton(based on CO2 avoided),respectively.Measures are proposed to reduce the cost of the three technologies.For CO2 capture and storage process,the CO2 recovery and purity should be greater than 90%.Based on the cost,recovery,and purity,it seems that chemical absorption is currently the most cost-effective technology for CO2 capture from flue gas from power plants.However,membrane gas separation is the most promising alternative approach in the future,provided that membrane performance is further improved. 相似文献
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炼厂干气的回收和利用是提高资源综合利用和增加企业经济效益的必要手段,如何能高效、可靠地实现干气资源的回收利用已经成为人们关注的一个重要课题。本文从炼厂干气的提浓回收和直接利用两个方面出发,对目前常用的深冷分离、吸收分离和吸附分离等提浓技术以及干气制乙苯、环氧乙烷等直接利用技术进行了概述,介绍了各种技术路线的优缺点和最新进展。各种干气回收利用技术适用的场合有差别,各具特点,炼油化工企业需依据自身的特点,在综合考虑各方面因素的基础上来选择合适的干气回收技术和工艺路线,以得到最佳的经济效益和环境效益。 相似文献
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Bingjie Pang Peng Zhang Zhongwei Cao Song Wang Jingjing Tong Xuefeng Zhu Weishen Yang 《American Institute of Chemical Engineers》2023,69(2):e17919
CO2 methanation is one of the vital reactions to utilize CO2 and realize power to gas process. To decrease the CO2 capture cost and alleviate the hot spots during the strong exothermic methanation reaction, here, we report a coupling of CO2 capture process with in situ CO2 methanation process through a ceramic-molten carbonate (MC) dual phase membrane reactor over the Ni-based catalyst. The performance of the membrane reactor was systematically investigated and compared with the traditional fixed-bed reactor. The results show that the performance of the membrane reactor is higher than that of the fixed-bed reactor, since the produced steam through the methanation process can be partially removed through the dual-phase membrane, which promotes the reaction shift to right side. A stability test shows no obvious degradation within 32 h. These results indicate that the membrane reactor is promising for coupling CO2 capture with in situ methanation process. 相似文献
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羰基合成工业中分离提纯CO的方法 总被引:1,自引:0,他引:1
羰基合成工业中使用的分离提纯CO的方法主要有:Cosorb法情况、膜分离法、深冷法和变压吸附法。本文分析了几种分离方法的特点,重点介绍变压吸附法在充矿国泰人工有限公司的应用情况。 相似文献
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汪东 《化学工业与工程技术》2014,(2):61-64
对膜吸收法回收CO2技术进行了研究,针对膜吸收CO2的特点,筛选出了适合的膜组件和有机胺配方溶液,建立了1套用于连续吸收和解吸试验的模拟装置,并进行了连续试验。研究了气体流量、溶液流量、吸收温度等操作条件对吸收效果的影响,考察了配方溶液在降低碳回收过程能耗方面的优势,在CO2捕集率达到80%时,新配方溶液再生能耗较相同浓度的乙醇胺溶液降低了29.7%。 相似文献
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A simplified thermodynamic analysis of adsorption processes in temperature swing adsorption (TSA) and pressure swing adsorption (PSA) modes as a function of adsorbate concentration and the adsorbent–adsorbate interaction strength is presented in this article. The thermodynamic separation efficiency of a TSA process is optimal at dilute feed conditions, and becomes more thermodynamically efficient with increasing adsorbate affinity even though the energy of separation increases. The adsorption process is spontaneous, and for a strong isotherm, the energy required to reverse the adsorption is nearly independent of the adsorbate concentration as adsorbate loading in nearly‐saturated materials is essentially constant with feed concentration. PSA units are efficient thermodynamically and the efficiency increases with the concentration of the desired adsorbate. This thermodynamic treatment has implications for separation processes that address carbon emissions. TSA systems operate more efficiently (thermodynamically) in the “air capture” case because they apply work to the concentrated product rather than the dilute feed. © 2016 American Institute of Chemical Engineers AIChE J, 62: 3699–3705, 2016 相似文献
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有机多孔聚合物(porous organic polymers,POPs)是一类由有机构建单元连接而形成的新型多孔材料。由于其优异的物理化学稳定性以及CO2吸附能力,近年来有关POPs在CO2捕集和分离的研究成为一大研究热点。大量具有优异孔性质(比表面积和孔容)的POPs通过不同有机合成反应被成功地开发出来应用于CO2吸附分离过程。本文介绍了POPs材料的CO2捕集与分离性能的研究现状,总结了提高POPs材料CO2分离性能的合成策略,重点分析了可以通过功能化增强吸附剂与二氧化碳分子之间的相互作用,来提高材料的CO2分离能力的方法。 相似文献
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Xavier Solimando Clément Lherbier Jérôme Babin Carole Arnal‐Herault Eugénie Romero Samir Acherar Brigitte Jamart‐Gregoire Danielle Barth Denis Roizard Anne Jonquieres 《Polymer International》2016,65(12):1464-1473
1:1[α/α‐Nα‐Bn‐hydrazino] pseudopeptide?polymer bioconjugates were synthesized and investigated as additives in a reference gas separation membrane (Pebax®) for CO2 capture. Pebax® is a polyether block amide thermoplastic elastomer provided by Arkema and is already well known for its good performance for CO2 separations. First, dimer and tetramer pseudopeptides were synthesized and their terminal amine was modified into a ‘clickable’ alkyne group in view of coupling. Second, an α‐azido acrylic poly(ethylene glycol)‐based oligomer was obtained by single‐electron transfer living radical polymerization and the two partners were coupled using copper(I) catalyzed alkyne‐azide cycloaddition (CuAAC) ‘click’ chemistry. The pseudopeptides and their bioconjugates were then assessed as original additives in Pebax® membranes for CO2/CH4 and CO2/N2 separations. The permeation data were analyzed according to the solution‐diffusion model. Compared to pseudopeptides, the pseudopeptide?polymer bioconjugates enabled the membrane properties to be greatly improved with better permeability (×1.5) and a good constant selectivity for CO2 capture. The best membrane properties were obtained with 3 eq. wt% of the tetramer‐based bioconjugate with a CO2 permeability of 194 Barrer (+46% compared to that of Pebax®) and constant selectivity (αCO2/N2 = 44 and αCO2/CH4 = 13). © 2016 Society of Chemical Industry 相似文献
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利用金属-有机骨架UTSA-280具有特定刚性尺寸的一维孔道可以筛分CO2、CH4、N2的特性,采用机械化学研磨法减小其颗粒尺寸,将UTSA-280掺入聚砜(PSf)中制备MOF基混合基质膜,用于天然气提纯和烟道气CO2捕获。结果表明,在PSf中掺入UTSA-280不仅可以增加聚合物的CO2渗透通量而且提高了气体分离选择性。当UTSA-280掺杂量为30%(质量)时,混合基质膜对CO2/CH4、CO2/N2的分离因子分别为56.39和53.17,CO2的渗透通量为18.61 Barrer,相对于PSf纯膜,选择性分别提高了47.3%和63.5%,CO2渗透通量提高了128.9%,打破了“trade-off”效应。该工作通过引进具有分子筛分效应的MOF填料,能够增加气体通量的同时提高混合基质膜对含CO2气体的分离性能,对天然气的提纯以及烟道气的CO2的捕获有重要意义。 相似文献