α-纤维素中空纤维致密膜组件吸收CO_2传质过程的研究  

Mass Transfer Process of CO_2 Absorption with α-Cellulose Hollow Fiber Dense Membrane Module

作　　者：李合兴[1] 曹义鸣[1] 孙承贵[1] 金培涛[1] 吴鸣[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《石油化工》2007年第4期345-348,共4页Petrochemical Technology

基　　金：国家重点基础研究发展计划(973)项目(2003CB615703)

摘　　要：采用α-纤维素中空纤维致密膜研究了从N2-CO2混合气中吸收CO2的传质过程,考察了吸收剂种类(一乙醇胺、二乙醇胺、三乙醇胺)以及吸收剂的浓度和流量、气体流量、气体压力等因素对CO2吸收过程的影响。实验结果表明,3种吸收剂中一乙醇胺的吸收效果最好;当一乙醇胺的浓度为3.5mol/L、流量为10L/h、气体流量为8.9×10-6mol/s、气体压力为0.2MPa、气体走壳程、逆流操作时,总传质通量和总传质系数分别达到最大值8.7×10-5mol/(m2.s)和1.1×10-6mol/(m2.s.kPa)。吸收剂流量对CO2吸收过程没有明显的影响。The hydrophilic α- cellulose hollow fiber dense membrane module was applied to absorb CO2 from N2 -CO2 mixture. Among three absorbents, namely ethanolamine （MEA）, diethanolamine and triethanolamine, MEA was most effective. Influences of MEA concentration, MEA flow rate, gas flow rate and gas pressure on CO2 absorption were investigated. Under optimal conditions： MEA concentration 3.5 mol/L, MEA flow rate 10 L/h, gas flow rate in shell side 8.9 × 10^ -6 mol/s, gas pressure 0.2 MPa and countercurrent operation, the overall mass transfer flux and coefficient can reach 8.7× 10^-5 mol/（ m^2 ·s） and 1.1 × 10^-6 mol/（ m2 · s · kPa）, respectively. Effect of absorbent flow rate on CO2 absorption is unobvious.

关 键 词：Α-纤维素 吸收剂 二氧化碳 传质 中空纤维致密膜 乙醇胺 

分 类 号：TQ028.8[化学工程]