新型复合吸附干燥剂的吸附动力学特性研究  

Study on adsorption kinetics characteristic of a kind of new composite desiccant

作　　者：刘业凤[1] 王如竹[2] 

机构地区：[1]上海理工大学动力工程学院,上海200093 [2]上海交通大学机械与动力工程学院,上海200030

出　　处：《上海理工大学学报》2006年第2期107-110,共4页Journal of University of Shanghai For Science and Technology

基　　金：上海市重点学科建设资助项目(T0503);国家杰出青年科学基金资助项目(50225621)

摘　　要：研制的一种由粗孔球形硅胶和氯化钙组成的新型复合吸附干燥剂SiO2.xH2O.yCaC l2与常用的干燥剂相比具有更好的吸水除湿性能.采用理论分析与实验验证的方法分析了新型复合吸附剂的吸附动力学特性及其影响因素,并建立了传质数学模型.研究结果表明,外扩散过程是传质的主要阻力,增大风速、减小吸附剂颗粒直径是减少传质阻力的有效措施.A kind of new composite desiccant SiO2·xH2O·YCaCl2 which is composed of macro-pore silica gel and CaCl2 is prepared. The desiccant is provided with better desiccant performance than common ones. Adsorption kinetics characteristic of the composite desiccant and its influencing factors are analyzed both theoretically and experimentally and the mathematical model of mass transfer is developed. The results show： external diffusion is the main resistance for mass transfer, and increasing air velocity and decreasing particle diameter are effective measures to decrease mass transfer resistance.

关 键 词：外扩散 传质 吸附动力学 复合吸附干燥剂 

分 类 号：TB611[一般工业技术—制冷工程]