分子筛/水浆料体系强化CO_2吸收的研究  

Mass Transfer Enhancement of CO_2 Absorption by Zeolite/Water Slurry System

作　　者：李少刚[1] 朱春英[1] 付涛涛[1] 马友光[1] 

机构地区：[1]天津大学化工学院化学工程联合国家重点实验室,天津300072

出　　处：《高校化学工程学报》2012年第6期940-945,共6页Journal of Chemical Engineering of Chinese Universities

摘　　要：采用搅拌釜研究了ZSM-5分子筛(SiO2/Al2O3=100)对水吸收二氧化碳的增强作用。考察了气相浓度、初始压力和固含率对增强因子的影响。结果表明,初始压力与气相浓度对吸收具有显著影响,增强因子随初始压力与气相浓度的增大而减小。固含率对增强因子的影响为:当固含率小于0.4 kg m 3时,增强因子随固含率的增加迅速增大;当固含率大于0.4 kg m 3时,增强因子的增加逐渐变缓并最终趋于恒定值。作者还提出了一个一维非均相传质模型并进行了理论求解,模拟预测值和实验结果吻合良好。The enhancement of mass transfer of CO2 absorption into water by molecular sieve （Zeolite SiO2/Al2O3=100） was studied in a stirred tank. The effects of gas concentration, pressure and solid loading on the enhancement factor were investigated. The results show that the pressure and gas concentration affect significantly the CO2 absorption process, and the enhancement factor decreases with the increase of the pressure and gas concentration. The effects of solid loading on the enhancement factor are as follows： when the solid loading is below 0.4 kg.m-3, the enhancement factor increases obviously with the increase of the solid loading; when the solid loading is beyond 0.4 kg.m-3, the increase becomes slower, finally the enhancement factor levels offto a constant value. An 1-D heterogeneous model was proposed and solved theoretically, the calculated value agrees well with the experimental data.

关 键 词：增强因子 传质 吸收 分子筛 

分 类 号：TQ021.4[化学工程] TQ028.17