›› 2003, Vol. 3 ›› Issue (4): 0-0.
• 4 •
张卫东，高坚，史季芬
出版日期:
发布日期:
LI Wei, GAO Lian
Online:
Published:
摘要： 用聚丙烯中空纤维膜吸收器，针对酸性气体膜吸收传质过程，根据浓差极化时存在局部高浓度区的特点，分别进行了SO2/空气混合气和CO2/空气混合气中酸性气体的选择性吸收实验. 实验测定了SO2和CO2两种不同酸性气体在不同浓度吸收液及不同液速下的总传质系数，比较了两种酸性气体在液相侧的传质特性，根据两组份间化学反应机理的不同，分析了浓差极化对膜吸收过程的影响.
关键词: 膜吸收, 总传质阻力, 浓差极化
Abstract: A special reaction system was proposed to investigate the mechanism of the mass transfer process in membrane absorption process. The mass transfer resistance of this process was calculated by using hydrophobic PP hollow fiber, for either SO2/air–NaOH system or CO2/air–NaOH system. Different phenomena in these two systems were discussed. Since the reaction mechanism of SO2–NaOH system and CO2–NaOH system is different, SO2 and CO2 mass transfer in solution side is different. The diffusion of different ions and the concentration polarization in liquid phase boundary layer, instead of the ionization effect, was the reason of deviation in SO2 absorption process. The influences of liquid phase velocity and the concentration of absorbent were discussed in this study.
Key words: nano, HAp, low-temperature sintering
中图分类号:
TQ028
张卫东;高坚;史季芬. 酸性气体膜吸收过程中浓差极化[J]. , 2003, 3(4): 0-0.
LI Wei; GAO Lian. Synthesis and Low-temperature Sintering of Nano-sized HAp Powders[J]. , 2003, 3(4): 0-0.
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