纳米颗粒强化醇胺水溶液捕集CO_(2)的实验研究

Experimental research of nanoparticle-enhanced CO_(2)capture in alcohol amine solution

为探究纳米颗粒强化二乙氨基乙醇(DEEA)和N-甲基二乙醇胺(MDEA)水溶液捕集CO_(2)的影响规律,采用两步法配制了不同纳米颗粒种类及粒径的纳米流体复配醇胺水溶液,分别考察了醇胺水溶液的吸收量、吸收速率和循环解吸量与纳米颗粒之间的关系。结果表明,醇胺水溶液分别加入TiO_(2)、SiO_(2)和石墨烯(GO)纳米颗粒后,DEEA水溶液和MDEA水溶液对CO_(2)的吸收和解吸得到了强化。30%DEEA-0.05%25 nm TiO_(2)、30%MDEA-0.05%40 nm TiO_(2)、30%MDEA-0.06%GO纳米体系对CO_(2)吸收量分别提高了9.86%,11.26%,13.8%;吸收速率分别提高了33.43%,49.72%,39.23%;解吸量分别提高了10.72%,9.19%,26.66%。通过13 C NMR和FTIR表征发现,加入纳米颗粒提高了气液间的传质,并未产生新的物质。

In order to investigate the effect of nanoparticles on CO_(2)capture in aqueous solutions of 2-diethylaminoethanol(DEEA)and N-methyldiethanolamine(MDEA),nanofluids with different types and sizes of nanoparticles were prepared by two-step method.The relationship between the absorption capacity,absorption rate,circulating desorption capacity of alcohol amine aqueous solution and nanoparticles was investigated.The results show that the absorption and desorption of CO_(2)by DEEA and MDEA solutions are enhanced by adding TiO_(2),SiO_(2)and grapheme(GO)nanoparticles improved the mass transfer between gas and liquid.The 30%DEEA-0.05%25 nm TiO_(2),30%MDEA-0.05%40 nm TiO_(2),30%MDEA-0.06%GO systems increased the CO_(2)absorption by 9.86%,11.26%and 13.8%;the absorption rate was increased by 33.43%,49.72%and 39.23%;the desorption amount was increased by 10.72%,9.19%and 26.66%.By 13 C NMR and FTIR characterization,it was found that the addition of nanoparticles improved the mass transfer between gas and liquid,and no new substances were produced.