Friedel-Crafts alkylation of benzene with benzyl alcohol over H-MCM-22


Karabulut D., AKYALÇIN S.

INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING, vol.19, no.5, pp.541-551, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 5
  • Publication Date: 2021
  • Doi Number: 10.1515/ijcre-2020-0175
  • Journal Name: INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Compendex
  • Page Numbers: pp.541-551
  • Keywords: benzyl alcohol, benzylation, catalyst deactivation, diphenylmethane, MCM-22, CATALYTIC-PROPERTIES, ZEOLITE MCM-22, DEACTIVATION, PERFORMANCE, REGENERATION, DISPROPORTIONATION, DESILICATION, SELECTIVITY, MORDENITE, PYROLYSIS
  • Anadolu University Affiliated: Yes

Abstract

MCM-22 was synthesized by using silicic acid powder as a silica source under the static hydrothermal condition and characterized by X-ray diffraction, nitrogen adsorption-desorption isotherms, scanning electron microscopy, inductively coupled plasma optical emission spectrometry, and temperature-programmed desorption of ammonia. The liquid phase benzylation of benzene with benzyl alcohol to diphenylmethane was investigated over H-MCM-22. The effects of reaction parameters on the conversion of benzyl alcohol and product distribution were determined. Under optimal reaction conditions, diphenylmethane yield of 92.1% was achieved for 99.3% conversion of benzyl alcohol in 3 h of reaction period. The reusability of the catalyst was also investigated after calcination of the catalyst in stagnant air at 500 degrees C for 4 h. The results show that the organic species produced during the reaction deposited in the catalyst lead to the deactivation of the catalyst and the calcination of the deactivated catalyst causes catalyst dealumination.