Catalytic Steam Reforming of Toluene for Hydrogen Production over Nickel-Cobalt Supported Activated Carbon

Keywords: Activated carbon, steam reforming, toluene, hydrogen

Abstract

Hydrogen may play a key role in future sustainable energy system as a carrier of renewable energy to replace the conventional fossil fuel. Biomass gasification is the most promising method in renewable hydrogen production technologies. However, the tar by-product poses great obstacle in the realization of commercial biomass gasification. In this work, the performance of Ni and/or Co supported on modified-palm kernel shell-derived activated carbon (AC) catalyst in steam reforming of toluene (SRT) for the production of hydrogen has been investigated. Toluene has been chosen as a model compound since it represents one of the major tar compositions. The effects of nitric acid in the surface pretreatment of AC (ACN) and the influence of Ni and/or Co loading on the catalyst support are studied. The catalysts are characterized using FTIR, BET, XRD, TGA and FESEM-EDX. The modified-AC support shows that the surface area, microporous structure and surface oxygenated functional group (SOFG) increase, leading to a homogeneous distribution of metal particles. The highest toluene conversion (Xtoluene) and hydrogen yield (YH2) obtained over 10%Ni-10%Co/ACN are 70% and 69%, respectively. The catalytic performance of bimetallic Ni–Co/ACN catalyst is more significant compared to monometallic Ni- and Co-supported catalysts. The highest catalytic performance achieved can be attributed to the larger surface area and unique porous structure of the modified-AC support as well as the formation of Ni–Co solid solution alloys that improve its coke-resistant capability with low carbon formation during SRT. The modified palm kernel shell AC-supported bimetal catalyst has high potential as a biomass-based catalyst for the applications in biomass tar removal toward hydrogen production due to its good coke-resistance properties.

Author Biographies

Hamdya Sabrina Mohidin Yahya, Universiti Teknologi Malaysia

Chemical Reaction Engineering Group

School of Chemical and Energy Engineering

Faculty of Engineering

Universiti Teknologi Malaysia

Nor Aishah Saidina Amin, Professor of Reaction Engineering Head of Chemical Reaction Engineering Group (CREG) FASc, FIChemE, P.E, MIEM, Senior MAIChE

School of Chemical & Energy Engineering
Faculty of Engineering
Universiti Teknologi Malaysia

Published
2019-11-11
How to Cite
Mohidin Yahya, H. S., & Saidina Amin, N. A. (2019). Catalytic Steam Reforming of Toluene for Hydrogen Production over Nickel-Cobalt Supported Activated Carbon. International Journal of Integrated Engineering, 11(7), 209-218. Retrieved from https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/4650