Silitonga, A.S.; Masjuki, H.H.; Mahlia, T.M.I.; Ong, H.C.; … - In: Renewable and Sustainable Energy Reviews 24 (2013) C, pp. 514-533
produced using different acid catalysts (HCL and H2SO4) and alkaline catalysts (NaOH, KOH, CH3ONa and CH3OK). The properties of …