Acidity effects of K promoted Co-based catalyst with NH4OH addition of the impregnation solution for Fischer-Tropsch synthesisZaky Al Fatony, Yosi Febriani, IGBN Makertihartha, Melia Laniwati Gunawan and SubagjoMATEC Web Conf., 268 (2019) 07001DOI: https://doi.org/10.1051/matecconf/201926807001