کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
57195 | 47109 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Selective permeation and separation of steam from water–methanol–hydrogen gas mixtures through mordenite membrane Selective permeation and separation of steam from water–methanol–hydrogen gas mixtures through mordenite membrane](/preview/png/57195.png)
Separation properties of a mordenite membrane for water–methanol–hydrogen mixtures were studied in the temperature range from 423 to 523 K under pressurized conditions. The mordenite membrane was prepared on the outer surface of a porous alumina tubular support by a secondary-growth method. It was found that water was selectively permeated through the membrane. The separation factor of water/hydrogen and water/methanol were 49–156 and 73–101, respectively. Even when only hydrogen was fed at 0.5 MPa, its permeance was as low as 10−9 mol m−2 s−1 Pa−1 up to 493 K, possibly suggesting that water pre-adsorbed in the micropores of mordenite hindered the permeation of hydrogen. The hydrogen permeance dramatically increased to 6.5 × 10−7 mol m−2 s−1 Pa−1 at 503 K and reached to 1.4 × 10−6 mol m−2 s−1 Pa−1 at 523 K because of the formation of cracks in the membrane. However, the membrane was thermally stabilized in the presence of steam and/or methanol.
Journal: Catalysis Today - Volume 132, Issues 1–4, 31 March 2008, Pages 182–187