合成条件对高硅SSZ-13分子筛膜单气体渗透性能的影响
发布时间：2018-11-15 07:16
【摘要】：采用2次水热合成法在多孔莫来石支撑体外表面上制备高硅SSZ-13分子筛膜,考察了合成溶胶中的Si/Al比、晶化时间、晶化温度、H_2O/SiO_2比对合成高硅SSZ-13分子筛膜的单气体渗透性能的影响.高硅SSZ-13分子筛膜的CO_2和CH_4的单气体渗透性能依赖于合成溶胶中的Si/Al比,Si/Al比越高,越有利于气体分离.其次,合成溶胶中H_2O/SiO_2比和晶化条件也能够影响分子筛晶体形貌、分子筛层厚度以及分子筛膜的单气体渗透性能.当合成溶胶的摩尔配比为1.000 SiO_2∶0.100 Na2O∶0.100 TMAda OH∶80.000H_2O∶0.005 Al_2O_3,晶化时间和温度分别为48 h和160℃时,制备的高硅SSZ-13分子筛膜具有最佳的单气体渗透性能,对CO_2的渗透速率可达到3.0×10-7mol·m-2·s-1·Pa-1,CO_2/CH_4的理想选择性为39.
[Abstract]:High silicon SSZ-13 molecular sieve membranes were prepared on porous mullite supported surface by two hydrothermal synthesis. The Si/Al ratio, crystallization time and crystallization temperature of the synthesized sol were investigated. The effect of H_2O/SiO_2 ratio on the permeability of high silicon SSZ-13 molecular sieve membranes. The single gas permeability of CO_2 and CH_4 of high silicon SSZ-13 molecular sieve membranes depends on the Si/Al ratio in the synthesized sol, and the higher the Si/Al ratio is, the more favorable the gas separation is. Secondly, the H_2O/SiO_2 ratio and crystallization conditions in the synthesized sol can also affect the morphology of molecular sieve crystal, the thickness of molecular sieve layer and the single gas permeability of molecular sieve membrane. When the molar ratio of the synthesized sol is 1.000 SiO_2:0.100 Na2O:0.100 TMAda OH:80.000H_2O:0.005 Al_2O_3, the crystallization time and temperature are 48 h and 160 鈩，
本文编号：2332529
[Abstract]:High silicon SSZ-13 molecular sieve membranes were prepared on porous mullite supported surface by two hydrothermal synthesis. The Si/Al ratio, crystallization time and crystallization temperature of the synthesized sol were investigated. The effect of H_2O/SiO_2 ratio on the permeability of high silicon SSZ-13 molecular sieve membranes. The single gas permeability of CO_2 and CH_4 of high silicon SSZ-13 molecular sieve membranes depends on the Si/Al ratio in the synthesized sol, and the higher the Si/Al ratio is, the more favorable the gas separation is. Secondly, the H_2O/SiO_2 ratio and crystallization conditions in the synthesized sol can also affect the morphology of molecular sieve crystal, the thickness of molecular sieve layer and the single gas permeability of molecular sieve membrane. When the molar ratio of the synthesized sol is 1.000 SiO_2:0.100 Na2O:0.100 TMAda OH:80.000H_2O:0.005 Al_2O_3, the crystallization time and temperature are 48 h and 160 鈩，
本文编号：2332529
本文链接：https://www.wllwen.com/kejilunwen/huagong/2332529.html
