A theoretical study was carried out in order to characterize the changes produced by the presence of sulfate on the alumina surface. A molecular orbital approach of the extended HΓΌckel (EH) type together with dynamic molecular calculation were performed to evaluate adsorption and desorption energies
Fluorinated alumina as a catalyst for skeletal isomerization of n-butene
β Scribed by ZhengXing Cheng; Vladmir Ponec
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 589 KB
- Volume
- 118
- Category
- Article
- ISSN
- 0926-860X
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β¦ Synopsis
Alumina modified by various fluorine containing compounds has been studied in reactions of nbutene. Combination of the results thus obtained with pieces of information from the literature leads to the following model. Skeletal isomerization takes place on Lewis acid sites as a monomolecular conversion, while on a catalyst with BrCnsted acid sites the bimolecular mechanism can prevail. Experiments with higher alkenes support this picture.
π SIMILAR VOLUMES
The two phase model of a freely bubbling gas-fluidised bed in which chemical reaction is occurring has been described in detail by Partridge and Rowe. It is based on knowledge of the physical behaviour of the system and of the chemical kinetics. The isomerisation of butene-1 to a mixture of cis-and