Res. Chem. Intermed.
, Vol. 34, Nos 8–9, pp. 755–760 (2008)
Koninklijke Brill NV, Leiden, 2008.
Also available online - www.brill.nl/rci
Enhancement of catalytic activity in dehydrogenation of
n-dodecane over nano-structured Pt–Sn/SBA-16
catalysts by microwave drying
YOUNG KYU HWANG
, AJIT SINGH MAMMAN
, DEOK-KYU KIM
and JONG-SAN CHANG
Research Center for Nanocatalysts, Korea Research Institute of Chemical Technology (KRICT),
P.O. Box 107, Daejeon 305-600, South Korea
Department of Chemistry, Inha University, Incheon 402-751, South Korea
Received 9 October 2007; accepted 22 October 2007
Abstract—In the present investigation, experimental results from a study of cubic SBA-16-supported
Pt–Sn bimetallic catalysts used to investigate dehydrogenation of n-dodecane to 1-dodecene are
presented. Pt (1 wt%)–Sn (1 wt%)/SBA-16 catalyst is synthesized using a simple co-impregnation
(CI) method. Further, the impregnated catalysts are dried separately using microwave drying (MW-D)
and conventional electrical drying (CE-D) techniques. The microwave-mediated drying of Pt (1%)–Sn
(1%)/SBA-16 shows a better catalytic performance and time-on-stream activity for the target reaction.
Keywords: Dodecane; inter-metallic alloy; temperature-programmed reduction; co-impregnation;
microwave drying; conventional drying.
For the last four decades, Pt-based bimetallic catalysts have played a major role as
backbone of the petroleum industry and are extensively used in the production of
aromatic hydrocarbons for automotive fuels . In the late 1960s, the monometallic
catalyst was replaced by bimetallic Pt–M/γ -Al
(M = Ge, Re,
Ir or Sn) systems . Presently, the three major bimetallic catalysts extensively
used are Pt–Re , Pt–Ir  and Pt–Sn . Among these systems, the supported
Pt–Sn bimetallic catalysts are widely used in industrially important reactions such
as dehydrogenation of linear hydrocarbons [6, 7].
In this work, we present experimental results from a study of Pt–Sn/SBA-16 cat-
alysts separately dried in microwave (MW-D) and conventional electrical (CE-D)
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