کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
638491 | 1456166 | 2007 | 11 صفحه PDF | دانلود رایگان |

Carbon molecular sieve membranes derived from cellulose–hemicellulose have been evaluated for hydrogen separation from light hydrocarbons. Copper(II) nitrate was added to the precursor in the range of 0–6 wt%, resulting in increased hydrogen/methane permselectivity at the expense of permeability. Carbonization temperature was varied from 400 to 700 °C, with the best performance for membranes produced between 550 and 650 °C. Mixed gas tests with H2, CO2, C1–C4 and N2 showed that these membranes tolerate light hydrocarbons and separated hydrogen with a permeability of about 480 Barrer and hydrogen/methane permselectivity >1000. Hydrogen/carbon dioxide permselectivity was found to be approximately 23 at 25 °C. Transport was activated and an increase of 65 °C doubled the mixed gas hydrogen permeability. Performance was strongly influenced by exposure to air.
Journal: Journal of Membrane Science - Volume 306, Issues 1–2, 1 December 2007, Pages 307–317