氯化钙/大球硅胶复合吸附剂的氨吸附研究  

Ammonia adsorption of composite adsorbent system of CaCl_2/silochrom

作　　者：毛雪峰[1] 张莹[1] 李丹凤[1] 胡子曼[1] 杨景昌[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《现代化工》2011年第5期56-59,共4页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(20576080)

摘　　要：以单层分散理论为指导，研究了氯化钙在大球硅胶上的单层分散、氨吸附及吸附稳定性。结果表明，对于焙烧分散法，氯化钙／大球硅胶的适宜焙烧温度为500％；对于微波分散法，适宜的微波辐射时间是20min。焙烧样品的单层分散阈值为0．2～0．3g／g，微波样品的单层分散阈值为0．3～0．4g／g。将吸附量较大的样品进行比较，在35℃下，担载量为0．4g／g的焙烧样品氨吸附量为0．35g／g；担载量0．5g／g的微波样品氨吸附量为0．41g／g。微波样品的氨吸附量大于焙烧样品。吸附一脱附循环实验表明，2种分散法所得复合吸附剂同样具有较好的吸附稳定性。The monolayer dispersion, ammonia adsorption and it＇s stability of CaCl2 onto silochrom are studied according to the theory of spontaneous monolayer dispersion. The resuhs show that, the proper calcination temperature for dispersion of calcium chloride onto siloehrom is 500℃ and the proper irradiation time for the sample dispersed by microwave is 20 minutes. The monolayer dispersion threshold of the sample dispersed by calcination is between 0. 2 g/g to 0. 3 g/g, and that of the sample dispersed by microwave is between 0. 3 g/g to 0.4 g/g. For the samples that have superior adsorption capacities, the ammonia adsorption capacities of the sample of loading 0.4 g/g treated by calcination is 0. 35 g/g at 35℃ and that of the sample of loading 0. 5 g/g treated by microwave irradiation is 0.41 g/g. The adsorption capacities of the microwave samples are also larger than the calcination samples. After many adsorption- desorption cycles,it is confirmed that both of the composite adsorbents have the preferable adsorption stability.

关 键 词：氯化钙 大球硅胶 复合吸附剂 单层分散 氨吸附 

分 类 号：TQ113.2[化学工程—无机化工]