کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
634377 | 1456068 | 2013 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Gas permeation properties and preparation of porous ceramic membrane by CVD method using siloxane compounds Gas permeation properties and preparation of porous ceramic membrane by CVD method using siloxane compounds](/preview/png/634377.png)
Membranes have been developed for separation of specific gas from other gas molecules. Tube type ceramic was used for substrate. Silica membranes derived from tetramethoxysilane (TMOS), phenyltrimethoxysilane (PhTMS) and 3-aminopropylmethyldiethoxysilane (APMDES) were synthesized by chemical vapor deposition (CVD) method at 650 °C. Permeation experiments with H2, CO2 and N2 with ceramic membranes were performed to determine the gas transport characteristics. H2/N2 selectivities of TMOS, PhTMS and APMDES derived membranes were decreased by 1265, 633 and 100. And CO2/N2 selectivities of TMOS, PhTMS and APMDES derived membrane were increased by 3, 5 and 20. It is suggested that whether the intermediate contained living groups has a large effect on the enlargement of the pore size of amorphous silica membranes.
► The membranes are prepared by chemical vapor deposition method on ceramic support.
► The pore size of membranes was controlled by depositing silica layers of different precursors.
► Hydrogen selectivity was excellent in TMOS derived membrane.
► Carbon dioxide selectivity was excellent in APMDES derived membrane.
► The coefficient β determined activated diffusion effects in membranes.
Journal: Journal of Membrane Science - Volume 431, 15 March 2013, Pages 72–78