Ni-based catalysts for steam reforming of tar model derived from biomass gasification

• Main Authors: Tan, R. S., Alir, A., Mohamad, S. A., Isa, K. M., Abdullah, T. A. T.
• Format: Conference or Workshop Item
• Language: English
• Published: 2019
• Subjects: TP Chemical technology
• Online Access: http://eprints.utm.my/id/eprint/88781/1/TuanAmran2019_NiBasedCatalystsforSteamReformingofTarModel.pdf; http://eprints.utm.my/id/eprint/88781/; http://www.dx.doi.org/10.1051/e3sconf/20199001015
• Institution: Universiti Teknologi Malaysia

Tar formation during biomass gasification is a major barrier to utilise the produced syngas, which clogs processing equipment. In the present study, steam reforming of gasification-derived tar (phenol, toluene, naphthalene, and pyrene) was catalysed by Ni/dolomite, Ni/dolomite/Al2O3, Ni/dolomite/La2O3, Ni/dolomite/CeO2, and Ni/dolomite/ZrO2 for hydrogen production. The steam reforming experiment was conducted in a fixed bed reactor at 700 °C and the steam-To-carbon molar ratio of 1 under atmospheric pressure. After the catalytic test, the spent catalysts were characterised by thermogravimetric analysis and variable-pressure scanning electron microscope. The aim of this study is to investigate the catalytic activity of Ni-based catalysts in terms of tar conversion and their deactivation characteristic. The current results revealed that all the catalysts showed almost full conversion of tar (98.8%-99.9%) and considerably low amount of coke deposited in the form of amorphous and filamentous carbon (15.9-178.5 mg gcat-1). Among the catalysts studied, Ni/dolomite/La2O3 gave the highest catalytic activity for steam reforming of gasified biomass tar and lowest coke formation.