摘要
建立了膜基复合溶液吸收CO2传质微分方程模型,模型中考虑了MDEA-AMP复合溶剂吸收反应交互作用和溶剂对膜孔的湿润性两种因素,模拟了这两种因素、不同气液速及不同组件对传质过程的影响,通过SEM摄片考察了溶剂对膜结构形态的影响.结果表明:交互作用和湿润性是影响传质过程不可忽略的重要因素;MDEA和AMP的增强因子对总增强因子不具有加和性;湿润使膜相阻力迅速上升,成为传质阻力的主导项;高液速时膜孔易被湿润;SEM摄片发现溶剂使膜孔增大,长时间运行疏水性膜有亲水化趋势.考虑交互因子β和湿润率η的模型,模型值与实验值符合更好.
A model of differential equations for membrane-based absorption of CO2 into complex solutions was presented and, interaction between methyldiethanolamine （MDEA） and 2-amino-2-methyl-1-propanol （AMP） in reactions with CO2 and wetting of the solutions on membrane pores were taken into account in the model. The effects of various factors such as interaction, wetting, modules, liquid and gas velocities, on mass transfer were simulated. Additionally, the effect of the solutions on membrane configuration was analyzed by SEM images. Interaction and wetting were significant non-negligible factors in mass transfer. Overall enhancement factor of complex solution was not summation of that of MDEA and AMP. Membrane resistance rapidly increased and became dominant with partial membrane pores being wetted. Membrane pores were easily wetted at high liquid velocity. SEM images displayed that aqueous solutions of both MDEA and MDEA＋ AMP made pores bigger and hydrophilic. By taking account of interaction and wetting into model, simulation value was in better agreement with experimental one.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第8期1439-1444,共6页
CIESC Journal
基金
国家教育部博士点基金项目(20020288015)~~
关键词
膜气体吸收
复合溶液
交互作用
湿润性
模拟
membrane gas absorption
complex solution
interaction
wetting
simulation
作者简介
陆建刚（1963-），男，博士研究生，高级工程师．
联系人：王连军．
