1 Catalytic steam reforming of tar derived from steam gasification 1 of sunflower stalk over ethylene glycol assisting prepared 2 Ni/MCM-41 3 Surachai Karnjanakom 1 , Guoqing Guan 1,2* , Bayu Asep 1 , Xiao Du 1,3 , Xiaogang Hao 3 , 4 Chanatip Samart 4 , Abuliti Abudula 1,2 5 1 Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, 6 Hirosaki 036-8560, Japan 7 2 North Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University, 8 2-1-3, Matsubara, Aomori 030-0813, Japan 9 3 Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 10 030024, China 11 4 Department of Chemistry, Faculty of Science and Technology, Thammasat 12 University, Pathumtani 12120 Thailand 13 14 15 16 17 *Corresponding author. Tel.: +81-17-762-7756; Fax: +81-17-735-5411 18 Email-address: guan@cc.hirosaki-u.ac.jp (G. Guan) 19 20 © 2015. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/