通过吸收-再生降低CO2捕集过程能耗的途径研究

L. Dubois, A. Costa, G. De Weireld, Diane Thomas
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引用次数: 0

摘要

一些工业部门,例如水泥制造商和石灰生产商,产生所谓的“不可避免的”二氧化碳排放,因为这些排放与工业过程本身(碳酸钙脱碳)有内在联系。为了减少这些排放,有必要实施碳捕获、利用和/或储存(CCUS)过程链,尽管其捕获步骤在技术上已经成熟(特别是使用胺基溶剂的吸收-再生过程),但会导致非常高的能耗。已经研究了减少这一消耗的三种途径(通过实验和/或通过开发Aspen PlusTM模拟),即:(i)由于增加烟气二氧化碳含量(通过部分氧燃烧和/或烟气再循环),(ii)在过程中(使用更有效和创新的溶剂混合物,如除混溶液),以及(iii)在配置层面,通过在捕获过程中使用先进的配置。结果表明,采用二乙基乙醇胺(DEEA)和甲氨基丙胺(MAPA)混合的脱混工艺,或采用先进的工艺配置(中冷吸收塔+富蒸气压缩+富溶剂裂解和预热,甲基二乙醇胺(MDEA) +哌嗪(PZ)为溶剂)是吸收再生过程中最节能的途径。即与使用单乙醇胺(MEA)的传统工艺相比,高出40%以上。此外,从经济的角度来看,与MEA的基本配置相比,脱混技术的优势在于能够以更有限的投资(CAPEX)(+1.6%)实现这种能源性能,而不是采用先进的工艺配置(+8.8%)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of pathways to reduce the energy consumption of the CO2 capture process by absorption-regeneration
Several industrial sectors, such as for example cement manufacturers and lime producers, produce so-called “unavoidable” CO2 emissions because these ones are intrinsically linked to the industrial process itself (decarbonation of calcium carbonate). In order to reduce these emissions, it is necessary to implement a Carbon Capture, Utilization and/or Storage (CCUS) process chain, whose step of capture, although already technologically mature (especially the absorption-regeneration process using amine(s)-based solvents), leads to very high energy consumption. Three pathways to reduce this consumption have been investigated (experimentally and/or through the development of Aspen PlusTM simulations), namely: (i) upstream of the process thanks to the increase of the flue gas CO2 content (by partial oxy-combustion and/or flue gas recirculation), (ii) within the process (using more efficient and innovative mixtures of solvents such as demixing solutions), and (iii) at the configurational level by using advanced configurations in the capture process. It emerged that the use of a demixing process such as the mixture composed of diethylethanolamine (DEEA) and methylamino-propylamine (MAPA), or the implementation of an advanced process configuration (InterCooling Absorber + Rich Vapor Compression + Rich Solvent Splitting and Preheating, with methyldiethanolamine (MDEA) + piperazine (PZ) as a solvent) are the most energy reducing pathways for the absorption-regeneration process, i.e. more than 40% in comparison with a conventional process using monoethanolamine (MEA). Moreover, from an economical point of view, and compared to a basic configuration with MEA, the demixing technology has the advantage of being able to achieve such energy performance with a more limited investment (CAPEX) (+1.6%) than with advanced process configurations (+8.8%).
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来源期刊
自引率
0.00%
发文量
342
审稿时长
6 weeks
期刊介绍: MATEC Web of Conferences is an Open Access publication series dedicated to archiving conference proceedings dealing with all fundamental and applied research aspects related to Materials science, Engineering and Chemistry. All engineering disciplines are covered by the aims and scope of the journal: civil, naval, mechanical, chemical, and electrical engineering as well as nanotechnology and metrology. The journal concerns also all materials in regard to their physical-chemical characterization, implementation, resistance in their environment… Other subdisciples of chemistry, such as analytical chemistry, petrochemistry, organic chemistry…, and even pharmacology, are also welcome. MATEC Web of Conferences offers a wide range of services from the organization of the submission of conference proceedings to the worldwide dissemination of the conference papers. It provides an efficient archiving solution, ensuring maximum exposure and wide indexing of scientific conference proceedings. Proceedings are published under the scientific responsibility of the conference editors.
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