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Title: Effect of boron on the stability of Ni catalysts during steam methane reforming
Authors: Xu, J.
Chen, L.
Tan, K.F.
Borgna, A.
Saeys, M. 
Keywords: Boron
Carbon deposition
Catalyst deactivation
Ni catalyst
Steam reforming
Issue Date: 25-Jan-2009
Citation: Xu, J., Chen, L., Tan, K.F., Borgna, A., Saeys, M. (2009-01-25). Effect of boron on the stability of Ni catalysts during steam methane reforming. Journal of Catalysis 261 (2) : 158-165. ScholarBank@NUS Repository.
Abstract: Ni catalysts promoted with 0.5 and 1.0 wt% boron were synthesized, characterized and tested during steam methane reforming, to evaluate the effect of boron on the deactivation behavior. Boron adsorbs on the γ-Al2O3 support and on the Ni particles and 1.0 wt% boron is found to enhance the stability without compromising the activity. Catalytic studies at 800 °C, 1 atm, a stoichiometric methane to steam ratio, and space velocities of 330,000 cm3/(h gcat) show that promotion with 1.0 wt% boron reduces the rate of deactivation by a factor of 3 and increases the initial methane conversion from 56% for the unpromoted catalyst to 61%. Temperature-programmed oxidation (TPO) and scanning electron microscopy (SEM) studies confirm the formation of carbonaceous deposits and illustrate that 1.0 wt% boron reduces the amount of deposited carbon by 80%. © 2008 Elsevier Inc. All rights reserved.
Source Title: Journal of Catalysis
ISSN: 00219517
DOI: 10.1016/j.jcat.2008.11.007
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