Xylene Isomerization in the Liquid Phase Using Large-Pore Zeolites

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Jonathan C. Gonçalves (Author) FEUP; Alírio E. Rodrigues (Author) FEUP

Journal

Title: Chemical Engineering and Technology

Vol. 39 No. 2

Pages: 225-232

ISSN: 0930-7516

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Associated Projects

LSRE-LCM - Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais

Other information

Authenticus ID: P-00K-5JQ

DOI: 10.1002/ceat.201500219

Abstract (EN): Three large-pore zeolites, Beta with Si/Al ratios of 25 and 35 and Mordenite with an Si/Al ratio of 30, were studied in the conversion of o-xylene at 493K. Maximum conversion was achieved by the catalyst with the highest Si/Al ratio due to faster diffusion of the isomer inside the zeolite channels because of the lower acidity of the solid even with larger crystal size. A kinetic study was then carried out over this catalyst between 473 and 513K in a batch reactor in the liquid phase. The activation energies obtained do not indicate the presence of diffusional constraints towards any isomer. Finally, the kinetic model obtained was simulated in a fixed-bed reactor and compared to ZSM-5 in the temperature range from 493 to 533K. An increment in p-xylene production of 20% on average was obtained.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8