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为了强化N-甲基二乙醇胺(MDEA)溶液对CO2的吸收,通过将纳米TiO2颗粒分散至质量分数50%的MDEA水溶液中,制备了TiO2-MDEA-H2O纳米流体.通过采用测定纳米流体的吸光度方法对纳米流体的分散稳定性进行研究.结果表明:经过机械分散,在不添加任何分散剂的情况下,纳米流体放置48 h无明显团聚现象.测量了纳米TiO2颗粒质量分数分别为0.05%,0.20%,0.40%和0.80%时纳米流体的热物理性质.结果表明:随着纳米TiO2颗粒质量分数的增加,纳米流体的表面张力、运动黏度和导热系数都增加了.纳米流体的表面张力最大增大了约0.6%,运动黏度最大增大了约4.6%,导热系数最大增加了约5.9%.
In order to enhance the CO2 absorption of N-methyldiethanolamine (MDEA) solution, TiO2-MDEA-H2O nanofluid was prepared by dispersing nano-TiO2 particles into 50% aqueous solution of MDEA.The absorbance Method was used to study the dispersion stability of nanofluids.The results showed that there was no obvious agglomeration of nanofluids for 48 h without any dispersant after mechanical dispersion.The results showed that the mass fraction of nanometer TiO2 particles was 0.05% The results show that the surface tension, kinematic viscosity and thermal conductivity of nanofluids increase with the increase of the mass fraction of nano-TiO2 particles.The maximum surface tension of nanofluids Increased by about 0.6%, the maximum kinematic viscosity increased by about 4.6%, the maximum thermal conductivity increased by about 5.9%.