纳米TiO2颗粒强化CO2吸收的研究  

The Use of TiO_2 Nanoparticles to Enhance CO_2 Absorption

作　　者：张宇[1] 赵博[1] 禚玉群[1] 王淑娟[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,二氧化碳资源利用与减排技术北京市重点实验室,北京100084

出　　处：《工程热物理学报》2016年第12期2697-2702,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51376108)

摘　　要：本文研究了纳米TiO_2颗粒对碳酸丙烯酯(PC)吸收CO_2的影响,并基于输运机理、微对流机理,建立了三维非稳态多粒子双机理模型对实验结果进行预测。研究表明:纳米流体的黏度随着颗粒纳米颗粒粒径越小,增强因子越大固含量的增大而增大;增强因子随着颗粒固含量的增大先增大后减小,存在最佳固含量;颗粒固含量较小时,相同固含量,纳米颗粒粒径越小,增强因子越大;颗粒固含量较大时,相同固含量,纳米颗粒粒径越大,增强因子越大;随着纳米颗粒粒径的增大,最佳固含量逐渐增大;模型计算值与实验值符合的较好,模型可以预测实验结果。This paper studies how TiO2 nanoparticles affect propylene carbonate absorption of CO2 and develops a three-dimensional instantaneous numerous-particle di-mechanism model based on the shuttle mechanism as well as a micro-convection mechanism to forecast the experimental results.The research shows that the viscosity of a nanofluid increases with enlargement of solid loading.The enhancement factor first increases and then decreases with increases in solid loading.This also proves the existence of optimal solid loading.When solid loading is small and similar,smaller nanoparticles result in larger enhancement factors.When the solid loading is large and uniform,larger nanoparticles create larger enhancement factors.As the particle size increases,the optimal solid loading gradually increases.But the particle size cannot be very large or else the nanoparticles will precipitate and the enhancement factor will be small.The results calculated by model agree well with the experimental results.The model can predict experimental data.

关 键 词：纳米颗粒 增强因子 输运机理 微对流机理 

分 类 号：TK123[动力工程及工程热物理—工程热物理]