采用纳米Al203和碳纳米管颗粒强化CO2吸收的理论及实验研究（英文）

编号：NMJS04170

篇名：采用纳米Al203和碳纳米管颗粒强化CO2吸收的理论及实验研究（英文）

作者：卢素敏； 邢敏； 孙燕； 董相均

关键词：absorption enhancement； nano-particles； enhancement factor； Brownian motion

机构： Department of Environmental and Chemical Engineering,Tianjin Polytechnic University

摘要： The influence of nano-particles on CO2absorption was studied experimentally in a stirred thermostatic reactor.Nano-Al2O3and carbon nanotube(CNT) particles which showed different hydrophobic properties were chosen for the investigation.The experimental results were compared with that of micron-size activated carbon(AC)and Al2O3particles.From the results,no enhancement by micron-size Al2O3was found,and with the increase of Al2O3concentration,the enhancement factor decreased.However,nano-Al2O3showed a weak enhancement for the CO2absorption.AC and CNT particles all intensified the gas-liquid mass transfer effectively,yet the trend of the enhancement factor with stirring speed for the two particles was different.With increasing stirring speed,the enhancement factor of AC particles was decreased,whereas in CNT suspensions it was increased.The experimental phenomena demonstrated a difference in enhancement mechanism for different size particles.For nano-particles,besides the influence of adsorbability and hydrophobicity,the micro-convection caused by Brownian motion should be also taken into account.Considering the micro-convection effect,a theoretical model was developed to shed light on the absorption enhancement by nano-particles.