TY - JOUR
T1 - Isomerization of n-butane over Pt-modified mordenite zeolite catalysts
T2 - Effect of Pt loadings and dealumination
AU - Villegas, J. I.
AU - Kumar, N.
AU - Salmi, T.
AU - Murzin, D. Yu
AU - Heikkilä, T.
AU - Hudec, P.
AU - Smiešková, A.
N1 - Funding Information:
This work is part of the activities at Abo Akademi Process Chemistry Centre within the Finnish Centre of Excellence Program (2000 - 2005) by the Academy of Finland. The research work was supported by Scientific Grant Agency of the Slovak Republic-VEGA.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2005
Y1 - 2005
N2 - Isobutane is an important raw material in the production of synthetic rubber and oxygenates for octane-boosting compounds. Highly acidic zeolites, such as mordenite, have been proposed as environmentally-friendly catalysts. Dealuminated and non-dealuminated mordenite zeolite catalysts (SiO 2/Al2O3 12.8) modified with 0.5, 1 and 2 wt-% of Pt were tested for the isomerization of n-butane. 0.5 wt-% Pt-MOR exhibited the highest isomerization efficiency (IE), e.g. defined as iC4/ (C3+C5) and the lowest deactivation at the conditions tested. Upon dealumination, the activity of the 0.5 wt-% Pt-modified mordenite zeolites decreased but the selectivity to isobutane was the highest. This is the combined effect of extra-framework Al and a less acidic catalyst. Calcination of dealuminated Pt-modified mordenite resulted in enhanced formation of micropores and there by increase in the initial conversion of n-butane.
AB - Isobutane is an important raw material in the production of synthetic rubber and oxygenates for octane-boosting compounds. Highly acidic zeolites, such as mordenite, have been proposed as environmentally-friendly catalysts. Dealuminated and non-dealuminated mordenite zeolite catalysts (SiO 2/Al2O3 12.8) modified with 0.5, 1 and 2 wt-% of Pt were tested for the isomerization of n-butane. 0.5 wt-% Pt-MOR exhibited the highest isomerization efficiency (IE), e.g. defined as iC4/ (C3+C5) and the lowest deactivation at the conditions tested. Upon dealumination, the activity of the 0.5 wt-% Pt-modified mordenite zeolites decreased but the selectivity to isobutane was the highest. This is the combined effect of extra-framework Al and a less acidic catalyst. Calcination of dealuminated Pt-modified mordenite resulted in enhanced formation of micropores and there by increase in the initial conversion of n-butane.
UR - http://www.scopus.com/inward/record.url?scp=30844432422&partnerID=8YFLogxK
U2 - 10.1016/s0167-2991(05)80548-8
DO - 10.1016/s0167-2991(05)80548-8
M3 - Article
AN - SCOPUS:30844432422
SN - 0167-2991
VL - 158 B
SP - 1859
EP - 1866
JO - Studies in Surface Science and Catalysis
JF - Studies in Surface Science and Catalysis
ER -