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Comparison of various configurations of the absorption-regeneration process using different solvents for the post-combustion CO2 capture applied to cement plant flue gases
International Journal of Greenhouse Gas Control ( IF 3.9 ) Pub Date : 2017-12-27 , DOI: 10.1016/j.ijggc.2017.12.004
Lionel Dubois , Diane Thomas

Carbon Capture Utilization or Storage (CCUS) has gained widespread attention as an option for reducing CO2 emissions from power plants but specific developments are still needed for the application to cement plants. More precisely, the post-combustion CO2 capture process by absorption-regeneration is the more mature technology but its cost reduction is still necessary. The present study is focusing on Aspen Hysys™ simulations of different CO2 capture process configurations (namely “Rich Solvent Recycle” (RSR), “Solvent Split Flow” (SSF), “Lean/Rich Vapor Compression” (L/RVC)) applied to the flue gas coming from the Norcem Brevik cement plant (taken as case study) and using three different solvents, namely: monoethanolamine (MEA), piperazine (PZ) and piperazine-methyldiethanolamine (MDEA) blend. For each configuration and solvent, different parametric studies were carried out in order to identify the operating conditions ((L/G)vol., split fraction, flash pressure variation, etc.) minimizing the solvent regeneration energy. Total equivalent thermodynamic works and utilities costs were also analyzed. It was shown that the configurations studied allow regeneration energy savings in the range 4–18%, LVC and RVC leading to the higher ones. As perspectives, other configurations and combination of configurations will be considered in order to further reduce the energy consumption of the process.



中文翻译:

使用不同溶剂吸收吸收-再生过程的各种配置,以用于燃烧后CO 2的捕集,这些捕集应用于水泥厂的烟道气

作为减少发电厂的CO 2排放的一种选择,碳捕集利用或封存(CCUS)已引起广泛关注,但对于水泥厂的应用,仍需要进行特殊开发。更精确地,通过吸收-再生的燃烧后CO 2捕集工艺是更成熟的技术,但是仍需要降低成本。本研究的重点是不同CO 2的Aspen Hysys™模拟捕获工艺配置(即“富溶剂循环”(RSR),“溶剂分流”(SSF),“稀/富蒸气压缩”(L / RVC))应用于来自诺塞姆·布雷维克水泥厂的烟道气(拍摄) (如案例研究),并使用三种不同的溶剂,即:单乙醇胺(MEA),哌嗪(PZ)和哌嗪-甲基二乙醇胺(MDEA)混合物。对于每种配置和溶剂,进行了不同的参数研究,以确定操作条件((L / G)体积。,分馏比,闪蒸压力变化等),从而最大程度地减少了溶剂的再生能量。还分析了等效热力学工作和公用事业的总费用。结果表明,所研究的配置可使再生能源节省4%至18%,LVC和RVC导致能量节省更高。作为观点,将考虑其他配置和配置的组合,以进一步减少该过程的能量消耗。

更新日期:2017-12-27
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