复合吸附剂SiO_2·xH_2O·yCaCl_2的水蒸气吸附等温线  

WATER-VAPOR SORPTION ISOTHERMS OF COMPOSITE ADSORBENTS SiO_2·xH_2O·yCaCl_2

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制冷技术研究所,上海200093 [2]上海交通大学制冷与低温工程研究所,上海200030

出　　处：《离子交换与吸附》2006年第3期224-230,共7页Ion Exchange and Adsorption

基　　金：国家重点基础研究发展规划项目(No.G2000026309);高等学校博士科研启动资金支持项目;上海市教委发展基金项目;上海市重点学科建设项目资助(编号:T0503)

摘　　要：配制了一种由粗孔球形硅胶和氯化钙组成的新型复合吸附剂SiO2·xH2O·yCaCl2,测得了4个不同氯化钙含量的复合吸附剂样品(氯化钙质量分数分别为0.130,0.2733,0.384和0.510)、CaCl2和粗孔球形硅胶在25℃、35℃及45℃的水蒸气吸附等温线。实验结果表明,复合吸附剂的平衡吸水量随CaCl2质量分数增加而增加,最大可达到粗孔球形硅胶的10倍。用Dubinin-Astakhov方程回归测得的等温线,求得相应的参数。a new kind of composite adsorbent SiO2·xH20·yCaCl2 which is composed of macro-porous silica gel and CaCl2 is prepared. Water-vapor adsorption isotherms of composite adsorbent samples （sample 1, sample 2, sample 3 and sample 4 with CaCl2 wt 0.130, 0.273, 0.384, 0.510, respectively）, CaCl2 and macro-porous silica gel are measured at temperatures 25℃, 35℃ and 45℃. Experimental results show that the more the CaCl2 wt of composite adsorbent is, the more the water-vapor equilibrium adsorbate uptake of the composite adsorbent is. The maximum equilibrium adsorbate uptake of composite adsorbent is 10 times that of macro-pore silica gel. Using Dubinin-Astakhov equation to regress the measured isotherms, the corresponding parameters are presented.

关 键 词：复合吸附剂 水蒸气吸附等温线 吸附机理 D-A方程 

分 类 号：O647.3[理学—物理化学]