Aromatization of n-heptane over H-AlMFI, Ga/H-AlMFI, H-GaMFI and H-GaAlMFI zeolite catalysts: influence of zeolitic acidity and non-framework gallium
✍ Scribed by V.R Choudhary; S.A.R Mulla; S Banerjee
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 102 KB
- Volume
- 57
- Category
- Article
- ISSN
- 1387-1811
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✦ Synopsis
Influence of zeolite acidity (strong acid sites measured in terms of the pyridine chemisorbed at 400 °C) and nonframework Ga-species present in the zeolite channels on the conversion (total and to aromatics) and selectivity in the aromatization of n-heptane at 500 °C over the H-AlMFI (H-ZSM-5), Ga/ H-AlMFI, H-GaMFI and H-GaAlMFI zeolite catalysts (GHSV ¼ 3400 and 13,600 h À1 ) has been investigated. Among the zeolite catalysts, the H-GaAlMFI (with high acidity and high non-FW Ga) showed the highest n-heptane conversion and aromatization activity. Both the zeolitic acidity and non-FW Ga-species were found to play important role in the aromatization process, producing a combined effect.