Optimization study on NiO-CaO5/SiO2-Al2O3 catalysedoi:10.1016/j.enconman.2016.09.041Asikin-MijanH.VLeeY.HTaufiq-YapAbdulkrem-AlsultanM.SMastuliHwai ChyuanEnergy Conversion & ManagementAsikin-Mijan N, Lee HV, Taufiq-Yap YH, et al. Optimization study of SiO2-Al2O3 supported bifunctional ...