Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 44, Issue 39, Pages 21303-21314Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.06.125
Keywords
Nickel; Dolomite; Catalyst; Hydrogen; Steam reforming; Tar
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Funding
- Universiti Teknologi Malaysia through the Research University Grant (GUP Tier 1) [20H52]
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The complex mixture of gasified tar model (phenol, toluene, naphthalene, and pyrene) was steam reformed for hydrogen production over 10 wt% nickel based catalysts. The catalysts were prepared by co-impregnation method with dolomite promoter and various oxide supports (Al2O3, La2O3, CeO2, and ZrO2). Steam reforming was carried out at 700 degrees C at-atmospheric pressure with steam to carbon molar ratio of 1 and gas hourly space velocity of 20 L/h.g(cat). The catalysts were characterised for reducibility, basicity, crystalline, and total surface area properties. Dolomite promoter strengthened the metal-support interaction and basicity of catalyst. The Ni/dolomite/La2O3 (NiDLa) catalyst with mesoporous structure (26.42mn), high reducibility (104.42%), and strong basicity (5.56 mmol/g) showed superior catalytic performance in terms of carbon conversion to gas (77.7%), H-2 yield (66.2%) and H-2/CO molar ratio (1.6). In addition, the lowest amount of filamentous coke was deposited on the spent NiDLa after 5 h. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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