用于捕集CO_(2)的相变吸收剂与乙醇胺吸收剂性能对比  

Performance comparison between phase change absorbent and ethanolamine absorbent for CO_(2)capture

作　　者：白雨鑫 郑润芬 魏立新[1] 赵福君 韩晓瑜 BAI Yuxin;ZHENG Runfen;WEI Lixin;ZHAO Fujun;HAN Xiaoyu(Key Laboratory of Improving Oil and Gas Recovery,Ministry of Education,Northeast Petroleum University,Daqing,Heilongjiang,China;Daqing Oilfield Design Institute Co.,Ltd.,Daqing,Heilongjiang,China)

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室 [2]大庆油田设计院有限公司

出　　处：《石油与天然气化工》2024年第4期19-27,48,共10页Chemical engineering of oil & gas

摘　　要：目的解决传统吸收剂捕集二氧化碳(CO_(2))存在的再生能耗和经济成本较高等问题,研发新型相变吸收剂。方法对4种相变吸收剂体系:DETA-1-propanol、MMEA-DEG、DEEA-MEA和DEEA-AEEA的性能进行了对比研究,以传统吸收剂质量分数为30%的乙醇胺(MEA)溶液作为参考基准,进行吸收、解吸、发泡、腐蚀、循环吸收-解吸实验研究以及再生能耗和成本估算。结果DETA-1-propanol体系的富相体积占总体积的66%,最大吸收负荷为3.34 mol/kg,与MEA吸收剂相比提高了54.6%。溶剂成本为11500元/t,相比MEA吸收剂增加了35.5%,再生显热(以每1 t CO_(2)计)为0.28 GJ/t,再生潜热为1.1 GJ/t,与MEA吸收剂相比分别降低了73.3%和12.0%。结论DETA-1-propanol吸收剂体系具有较高的吸收、解吸性能和较高的循环稳定性,以及较低的再生能耗和溶剂成本。Objective The aim is to solve the problems of high regeneration energy consumption and high economic cost in the capture of carbon dioxide(CO_(2))by traditional absorbents,and to develop new phase change absorbents.Methods This paper provided a comparative study of the performance of four phase change absorbent systems:DETA-1-propanol,MMEA-DEG,DEEA-MEA,and DEEA-AEEA.Using monoethanolamine(MEA)with a traditional absorbent mass fraction of 30%as a reference standard,experiments were conducted to study absorption,desorption,foaming,corrosion,cyclic absorption-desorption,as well as estimated regeneration energy consumption and costs.Results The DETA-1-propanol system had a rich phase volume accounting for 66%of the total volume,with a maximum absorption capacity of 3.34 mol/kg,representing a 54.6%improvement compared to 30%MEA absorbents.The solvent cost was 11500 yuan/t,which increased by 35.5%compared to 30%MEA absorbents.The regeneration enthalpy was 0.28 GJ/t CO_(2),and the regeneration latent heat was 1.1 GJ/t CO_(2).Compared with MEA absorbent,it reduced by 73.3%and 12.0%,respectively.Conclusions The DETA-1-propanol absorbent system exhibits higher absorption and desorption performance,high cycling stability,as well as lower regeneration energy consumption and solvent cost.

关 键 词：二氧化碳 碳捕集 相变吸收剂 吸收 解吸 腐蚀 再生能耗 

分 类 号：X701[环境科学与工程—环境工程] TQ028.17[化学工程]