Ni-based catalysts for steam reforming of tar model derived from biomass gasification Ru Shien Tan, Afizah Alir, Saiful Azam Mohamad, Khairuddin Md Isa and Tuan Amran Tuan Abdullah E3S Web Conf., 90 (2019) 01015 Published online: 02 April 2019 DOI: 10.1051/e3sconf/20199001015