A highly stable and selective Pt-modified mordenite catalyst for the skeletal isomerization of n-butane

José Ignacio Villegas, Narendra Kumar, Teemu Heikkilä, Agáta Smiešková, Pavol Hudec, Tapio Salmi, Dmitry Yu Murzin*

*Korresponderande författare för detta arbete

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

11 Citeringar (Scopus)

Sammanfattning

The aim of this work is to investigate the skeletal isomerization of n-butane to isobutane over Pt-modified mordenite zeolite catalysts and proton form mordenite with different SiO2/Al2 O3 ratios. The 2-wt% Pt-H-MOR-20 and 2-wt% Pt-H-MOR-12.8 catalysts were synthesized by impregnation method, while H-MOR-12.8 and H-MOR-20 were obtained by calcinations of their ammonium-form counterparts. The influence of reaction temperature, carrier gas and dilution of the feed stream on the conversion of n-butane and yield of isobutane during time-on-stream has been studied. The Pt-modified mordenite catalysts have been characterized using XRD, scanning electron microscopy (SEM), nitrogen adsorption, CO chemisorption and FTIR of adsorbed pyridine. Pt-H-MOR-12.8 exhibited the highest yield and selectivity to isobutane and it was the most stable towards catalyst deactivation. Typically, an excess of propane with respect to pentanes was formed and the selectivity to pentanes remained constant for the different Pt-H-MOR and conditions tested. Selectivity to propane was inversely dependent on the H2 concentration in the feed and the SiO2 Al2O3 ratio.

OriginalspråkEngelska
Sidor (från-till)223-230
Antal sidor8
TidskriftApplied Catalysis A: General
Volym284
Utgåva1-2
DOI
StatusPublicerad - 28 apr 2005
MoE-publikationstypA1 Tidskriftsartikel-refererad

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