摘要
高吸收效率与低解吸能耗的化学吸收剂是降低CO_2捕集成本的有效途径。从吸收剂的吸收速率、解吸速率、循环负载量、循环吸收量和循环效率等对不同组成的N,N-二甲基丁胺(DMBA)与N,N-二乙基乙醇胺(DEEA)水溶液的CO_2吸收解吸特性进行了研究。结果表明,此吸收剂体系CO_2吸收容量大,可达1.603 3 mol/kg,吸收CO_2后溶液会分成CO_2浓度相差较大的两相,其中富集相CO_2的浓度可达2.688 1 mol/kg,贫相CO_2的浓度为0.511 9 mol/kg。适宜的吸收剂组成为2 mol/L DMBA+4 mol/L DEEA,其循环负载量为0.193 6,循环吸收量为1.283 2 mol/kg,循环效率为96.95%。
Using chemical absorbents with high absorption efficiency and low desorption energy requirement is an effective access to reduce the cost of CO2 capture.In this paper, from the aspects such as absorption rate, desorption rate, cyclic loading amount, cyclic absorption capacity, and cyclic efficiency of absorbents, the absorption and desorption performance of various content aqueous solution of N, N-dimethylbutylamine （DMBA） and N, N-diethylethanolamine （DEEA） against CO2 is studied.The results show that the CO2 absorption capacity for this absorbent system is as large as 1. 603 3 mol/kg. Once after absorbing CO2, the solution will form two phases with different concentrations of CO2. Of which the concentration of CO2 reaches 2. 688 1 mol/kg in the enriched phase and is 0. 511 9 mol/kg in the lean phase. The optimal composition of absorbent system is 2 mol/L of DMBA plus 4 mol/L of DEEA, which shows cyclic loading amount of 0. 193 6, cyclic absorption capacity of 1. 283 2 mol/kg and cyclic efficiency of 96. 95%.
出处
《现代化工》
CAS
CSCD
北大核心
2017年第6期141-145,共5页
Modern Chemical Industry
