Bj?rgen M. et al. - Methanol to gasoline over zeolite H-ZSM-5 Improved catalyst performance by treatment with NaOH.pdf

Applied Catalysis A: General 345 (2008) 43–50
Contents lists available at ScienceDirect
Applied Catalysis A: General
journal homepage: ate/apcata
Methanol to gasoline over zeolite H-ZSM-5: Improved catalyst performance
by treatment with NaOH
Morten Bjørgen a, Finn Joensen b, Martin Spangsberg Holm b, Unni Olsbye c,
Karl-Petter Lillerud c, Stian Svelle c,*
a Norwegian University of Science and Technology, Department of Chemistry, Høgskoleringen 5, N-7491 Trondheim, Norway
b Haldor Topsøe, Nymøllevej 55, DK-2800 Lyngby, Denmark
c Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, . Box 1033, Blindern, N-0315 Oslo, Norway
ARTICLE INFO ABSTRACT
Article history: This work outlines how treatment of zeolite H-ZSM-5 (Si/Al = 46) with NaOH may improve the catalytic
Received 4 December 2007 performance in the conversion of methanol to gasoline. The zeolite was treated with or M NaOH
Received in revised form 16 April 2008 solution for 2Â 4 h at 75 8C. XRD confirmed the retention of crystallinity. The Si/Al ratio of the catalyst
Accepted 16 April 2008 decreased as a consequence of the treatment, in particular for the more severely treated sample, but the
Available online 24 April 2008
total acidity determined by NH3-TPD was not altered, showing that the treated samples contain
significant amounts of Al not giving