摘要
船舶碳捕集、利用与封存(CCUS)技术是航运业规模化脱碳的有效方案,但空间、再生能耗和成本问题使船舶CCUS技术的实际应用面临巨大挑战。开发具有良好CO_(2)吸收性能和循环性能,以及低再生能耗的胺液吸收体系是解决船舶CCUS技术应用难题的重要途径之一。针对船舶尾气的低CO_(2)分压和高排放量特点,以N-氨乙基哌嗪(AEP)、羟乙基乙二胺(AEEA)和N-甲基二乙醇胺(MDEA)作为胺组分制备了一系列单组分、二元复配和三元复配胺液体系,并研究了不同胺液体系的CO_(2)吸收与再生性能。结果表明,由质量分数分别为35%、16%、9%和40%的AEP、AEEA、MDEA和H_(2)O组成的三元复配胺液体系(配方I)的CO_(2)吸收与再生性能最佳,当吸收温度为40℃时,其CO_(2)摩尔吸收量、CO_(2)体积吸收量和CO_(2)吸收速率分别为1.023 mol/mol、114.5 mL/g和2.13×10^(-5) mol/(g·min),较单乙醇胺(MEA)溶液(w=30%)分别提高了84.3%、87.4%和1.75%;当再生温度为105℃时,配方I的最高再生速率、CO_(2)再生量和再生率分别为4.68×10^(-5) mol/(g·min)、0.919 mol/mol和89.9%,较MEA溶液分别提高了35.3%、64.3%和15.6%。同时,配方I具有较好的循环性能,在10次吸收-再生后,其再生率维持在90%左右。配方I在第一次吸收-再生中的再生能耗为2.54 GJ/t,较MEA溶液降低了34.7%。
Shipboard carbon capture,utilization,and storage(CCUS)technology represents an effective solution for large-scale decarbonization in the shipping industry.However,its practical application faces significant challenges due to spatial constraint,regeneration energy consumption,and cost issue.Developing amine solution absorption systems with superior CO_(2)absorption capacity,cycling stability,and low regeneration energy consumption is a critical pathway to address these application barriers.Targeting the characteristics of low CO_(2)partial pressure and high volume in ship exhaust,a series of single component,binary compound and ternary compound amine solution systems were prepared using N-aminoethyl piperazine(AEP),hydroxyethyl ethylenediamine(AEEA)and Nmethyldiethanolamine(MDEA)as amine components,and their CO_(2)absorption and regeneration performances were investigated.The results show that the ternary compound amine solution system(formulation I)with mass fraction of AEP,AEEA,MDEA and H_(2)O of 35%,16%,9%and 40%,respectively,exhibits optimal CO_(2)absorption and regeneration performance.At the absorption temperature of 40℃,CO_(2)mole absorption capacity,volumetric absorption capacity and absorption rate of formulation I are 1.023 mol/mol,114.5 mL/g and 2.13×10^(-5) mol/(g·min),respectively,representing increases of 84.3%,87.4%and 1.75%compared to monoethanolamine(MEA)solution(w=30%).At the regeneration temperature of 105℃,formulation I achieves the maximum regeneration rate,CO_(2)regeneration capacity and regeneration efficiency of 4.68×10^(-5) mol/(g·min),0.919 mol/mol and 89.9%,respectively,corresponding to improvements of 35.3%,64.3%and 15.6%over MEA solution.Furthermore,formulation I maintains good cycling stability,retaining approximately regeneration efficiency of 90%after 10 absorption-regeneration cycles.The regeneration energy consumption of formulation I in the first absorption-regeneration is 2.54 GJ/t,which is 34.7%lower than that of MEA solution.
作者
李伟康
孙其源
彭超飞
杨天逸
任晓乾
LI Weikang;SUN Qiyuan;PENG Chaofei;YANG Tianyi;REN Xiaoqian(College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,Jiangsu,China)
出处
《低碳化学与化工》
北大核心
2025年第12期120-128,共9页
Low-Carbon Chemistry and Chemical Engineering
关键词
复配胺液体系
CO_(2)捕集
吸收-再生性能
船舶尾气
compound amine solution systems
CO_(2)capture
absorption-regeneration performances
ship exhaust
