Synthesis of CaO-SiO2 catalyst from lime mud and kaolin residue for biodiesel production

• DOI: 10.1016/j.matlet.2020.128759
• Publication Date: 2020-10-01T05:57:54Z
• Authors: Piyanan Boonphayak; Sirikarn Khansumled; Chokchai Yatongchai
• Keywords: Residue (chemistry)

Abstract In the present work, synthesis of CaO-SiO2 catalysts using industrial wastes including lime mud and kaolin residue was proposed. The CaO-SiO2 catalysts were synthesized through a simple precipitation followed by calcination at 950 °C. The synthesized catalysts consisted of quartz, CaO and Ca(OH)2 proportion of which depended on CaO:SiO2 ratio. The catalytic activity was also investigated. The FAME yield reached up to 93% when the catalyst with CaO:SiO2 = 2 was used. However, it was found to decrease with numbers of reuse.