Characteristics of CeZrO2 Supported Pt Catalysts on the Aqueous Phase Reforming of Ethylene Glycol
Kim et al.
hydrogen yield and the conversion of carbon to gas selec-
tivity without decreasing the selectivity of hydrogen and
alkane with WHSV. However, a higher hydrogen produc-
tion rate was obtained at 6.0 h−1. Investigation of the influ-
ence of WHSV demonstrated that lower WHSV (longer
contact time) could facilitate conversion of ethylene glycol
into hydrogen and the reforming ratio of hydrogen to car-
bon dioxide was also close to the theoretical value of 2.5,
while at a higher WHSV, this can be attributed to a shorter
contact time for the ethylene glycol reactant with the cata-
lyst that allows the reforming reaction to take place, while
shorter contact time only allows the partial conversion of
ethylene glycol.
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The effect of support on the aqueous phase reforming of
ethylene glycol over 2 wt% Pt/Ce0ꢁ15Zr0ꢁ85O2 catalysts has
been investigated. It was found that the support effect on the
activity of 2 wt% Pt/Ce0ꢁ15Zr0ꢁ85O2 catalysts with different
preparation method was given as follows: CZH < CZM ≤
CZC < CZS. It was suggested that the catalytic activity
for reforming of ethylene glycol is dependent on degree
of reduction, Pt dispersion and porous structure properties.
2 wt% Pt/Ce0ꢁ15Zr0ꢁ85O2 (CZS) catalyst showed good cat-
alytic activity for APR reaction due to its high metal disper-
sion and reducibility. On the effect of reaction conditions
such as reaction temperature and WHSV, the hydrogen pro-
duction rate and hydrogen yield increased in proportion to
the reaction temperature and corresponding system pres-
sure, whereas WHSV slightly affected APR activity.
Acknowledgment: This work was financially supported
by the grant from the Industrial Source Technology Devel-
opment Programs (10033099) of the Ministry of Knowl-
edge Economy (MKE) of Korea.
Received: 30 November 2011. Accepted: 19 March 2012.
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J. Nanosci. Nanotechnol. 13, 5874–5878, 2013