Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6503385 | Catalysis Communications | 2015 | 22 Pages |
Abstract
Commercial silica-alumina catalysts prepared by different procedures have been characterized. Both present strong Lewis acidity together with Brønsted sites able to protonate pyridine. No evidence of “zeolitic” bridging OH's but significant heterogeneity of terminal silanol groups, part of which are likely “pseudobridging”, was found. Similar high activity in ethanol conversion but markedly different selectivities to ethylene and diethyl ether were found. They are less active than both zeolites and γ-Al2O3. Lewis sites with alumina-like acidobasic neighbor are more selective for ethylene production while Lewis sites with silica-like covalent neighbor are more selective for diethyl ether.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Thanh Khoa Phung, Guido Busca,