膜科学与技术

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Numerical simulation of mass transfer process of absorbing nitrogen oxide by ceramic membrane contactor

Authors： SUN Hailong

Units： Nanjing Research Institute of Yangzi Petrochemical Co., Ltd., SINOPEC, Nanjing 210048, China

KeyWords： ceramic membrane; membrane contactor; NO removal; mass transfer model; chemical absorption

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2022,42(4):122-129

Abstract：

Membrane absorption of nitrogen oxides by ceramic membrane contactors is one of the most effective methods. However, there is almost no mass transfer model for membrane contactor that absorb nitrogen oxides. In this paper, the convection, diffusion and reaction process of NO are simulated. The mass transfer model of the ceramic membrane contactor that absorbs NO with NaClO2 solution is established. The concentration and resistance distribution in the ceramic membrane contactor membrane are accurately predicted. At the same time, the influence of gas flow rate, NO inlet content, absorbent flow rate, concentration, pH and absorption temperature on the NO removal efficiency of the ceramic membrane contactor were analyzed. The operating conditions of the membrane absorption were optimized. The maximum NO flux of the membrane contactor was obtained. Finally, the mass transfer model predicts the NO removal efficiency of the membrane contactor. The theoretical support for the design and optimization of the membrane contactor's NO removal s is proposed.

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AuthorIntro：

孙海龙(1982-)，男，重庆市人，博士，高级工程师，研究方向为化工分离过程

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