Characterization and Performance of Novel Modified Silica Gel/Molecular Sieve Composite

摘要：

In this paper, using lithium chloride and calcium chloride as modifying agents, the modified silica gel and molecular sieve composite based on ceramic fiber was prepared by treating ceramic fiber paper with sequential impregnation of the suspension of waterglass and molecular sieve and the aqueous solution of modified salt. The composition of the modified composite was characterized by using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS). Thermogravimetry (TG) and temperature programmed desorption (TPD) were used to evaluate the desorption performance of the composite .FTIR spectra indicated that impregnation salt has no effect on the composition of molecular sieve. XPS analysis indicated that some modified ions entered the molecular sieve skeleton and formed Si-O-Ca or Si-O-Li linkages. TG and TPD analysis indicated that desorption activated energy of modified composite was lower than that of molecular sieve. The result of the dynamic and static adsorption experiment showed that the adsorption performance of molecular sieve enhanced greatly through the modification.

关键词： impregnated deposition modified silica gel/molecular sieve composite desorption performance adsorption property

作者: Yutang Fang Wenfan Yao Jinghua Guo Xuenong Gao

作者单位: Key Lab of heat transfer and Energy Conservation, South China University of Technology, Guangzhou 510640, China

会议类型: 国际会议

会议名称: 4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)

会议地点: 广州

会议语种:英文

页码: 1-4

在线出版日期: 2012-01-06（万方平台首次上网日期，不代表论文的发表时间）