Activated carbon supported silicotungstic acid catalysts for ethyl-tert-butyl ether synthesis

DEĞİRMENCİ L., OKTAR N., Dogu G.

AIChE Journal, vol.57, no.11, pp.3171-3181, 2011 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 57 Issue: 11
  • Publication Date: 2011
  • Doi Number: 10.1002/aic.12524
  • Journal Name: AIChE Journal
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3171-3181
  • Keywords: Activated carbon, Catalyst, Cs-STA, ETBE, STA
  • Bilecik Şeyh Edebali University Affiliated: Yes

Abstract

Vapor phase ethyl-tert-butyl ether (ETBE) production was conducted in the presence of Cesium salts of silicotungstic acid (Cs-STA), activated carbon supported silicotungstic acid (AC-STA), and activated carbon supported Cesium salts of silicotungstic acid (AC-Cs-STA) catalysts. Isobutene (IB) conversion to ETBE at 373 K were determined as 0.16 and 0.2 for STA and AC-STA catalysts on constant space time basis. This increase of activity is one of the highlights of this study considering that STA loading in AC-STA catalysts had been adjusted to 40%. IB conversion to ETBE obtained at 373 K in the presence of AC-STA catalyst was found to be close to equilibrium. Stability of the synthesized catalysts were tested by applying a washing procedure with ethanol. Repeated ETBE synthesis with thoroughly washed samples indicated quite stable and active catalyts. © 2011 American Institute of Chemical Engineers (AIChE).