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- Title
Bacterial Cellulose Supported Alumina Catalyst for Ethanol Dehydration.
- Authors
Ibnu Abdulwahab, M.; Khamkeaw, A.; Jongsomjit, B.; Phisalaphong, M.
- Abstract
An ultrafine three-dimensional nanofiber network structure of a very high porosity endows bacterial cellulose (BC) to function as support for heterogeneous catalysis. A novel catalyst of BC supported alumina (AlO) was developed by soaking purified BC hydrogel in aluminum nitrate (Al(NO)) aqueous solution, dehydration (hot air drying and freeze-drying) and calcination. The Al/BC catalysts reveal interior meso-macro porous structures with average pore diameters in the range of 17-34 nm. The catalytic activities were examined through an ethanol dehydration reaction in the gas phase at atmospheric pressure in the range of 200-400 °C. The effects of acidic metal loading and dehydration methods were investigated. Increasing Al loading from 12 to 50% resulted in a decreased surface area but an increase in pore size. At the same Al loading, the catalysts with a dehydration process by hot air drying presented higher Al concentrations on the outer surface compared with those by freeze-drying. At high temperature of 400 °C, Al/BC catalysts with 25 wt% Al loading and dehydrated by freeze drying (25Al/BC FD) and 50 wt% Al loading, dehydrated by hot air drying (50Al/BC TD) exhibited the highest ethanol conversions of 65.7-66.4% and ethylene yields of 43.26-44.24%, respectively, whereas at low temperature of 200 °C, Al/BC catalysts with 25 wt% Al loading with either dehydration method exhibited the highest diethyl ether yields of 40.02-41.60%. Graphical Abstract:
- Subjects
CELLULOSE; CATALYST supports; HETEROGENEOUS catalysis; ALUMINUM oxide; ETHANOL; DEHYDRATION reactions
- Publication
Catalysis Letters, 2017, Vol 147, Issue 9, p2462
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-017-2145-y