Exergy analysis of a conceptual CO2 capture process with an amine-based DES

IF 3.8 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Emad Ali, M. Hadj-Kali, S. Mokraoui, R. Khan, Meshal Aldawsari, M. Boumaza
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Abstract

Abstract The energy efficiency of an absorption–desorption system for carbon dioxide capture from flue gas utilizing methyltriphenylphosphonium bromide-monoethanolamine (MEA) deep eutectic solvent is investigated in this article. According to the results, when the working pressure of the absorber column increases, the process becomes significantly exergy deficient, with an exergy loss of 7.63 MW compared to 5.7 MW for a normal MEA process. The majority of the exergy deficit is due to flue gas compression effort, which accounts for 99% of the total process exergy. The process’s exergy shortfall can be improved by lowering the absorber pressure from 10 to 3 atm, lowering the carbon dioxide removal efficiency from 90% to 60%, and increasing the solvent-to-gas ratio from 075 to 7.05. Furthermore, the incorporation of an energy recovery device could allow for an 80–90% reduction in the energy consumed by the gas compressor when running at 10 atm, from 5.7 to 1.2 MJ‧kg CO2 −1. With this adjustment, the deep eutectic solvent-based process can match or outperform the corresponding aqueous alkanolamine solvent-based process in terms of exergy destruction and specific energy consumption.
胺基DES概念CO2捕获过程的火用分析
摘要本文研究了利用甲基三苯基溴化鏻单乙醇胺(MEA)深共晶溶剂从烟气中捕获二氧化碳的吸收-解吸系统的能量效率。结果表明,当吸收塔的工作压力增加时,该过程变得明显的火用不足,火用损失为7.63 MW与5.7相比 MW用于正常MEA工艺。大部分(火用)不足是由于烟气压缩作用造成的,烟气压缩作用占整个过程火用的99%。该工艺的火用不足可以通过将吸收器压力从10降低到3来改善 atm,将二氧化碳去除效率从90%降低到60%,并将溶剂与气体的比率从075提高到7.05。此外,能量回收装置的结合可以使气体压缩机在10℃运行时消耗的能量减少80-90% 大气压,从5.7到1.2 MJ·kg二氧化碳−1。通过这种调整,深度共晶溶剂基工艺在火用破坏和比能耗方面可以与相应的水性链烷醇胺溶剂基工艺相匹配或优于该工艺。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Green Processing and Synthesis
Green Processing and Synthesis CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
6.70
自引率
9.30%
发文量
78
审稿时长
7 weeks
期刊介绍: Green Processing and Synthesis is a bimonthly, peer-reviewed journal that provides up-to-date research both on fundamental as well as applied aspects of innovative green process development and chemical synthesis, giving an appropriate share to industrial views. The contributions are cutting edge, high-impact, authoritative, and provide both pros and cons of potential technologies. Green Processing and Synthesis provides a platform for scientists and engineers, especially chemists and chemical engineers, but is also open for interdisciplinary research from other areas such as physics, materials science, or catalysis.
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