A Highly Effective Biomass-Derived Solid Acid Catalyst for Biodiesel Synthesis Through Esterification.

Efficient valorization of renewable liquid biomass for biodiesel production using the desirable biomass-based catalysts is being deemed to be an environmentally friendly process. Herein, a highly active biomass-based solid acid catalyst (SiO@Cs-SOH) with renewable chitosan as raw material through sulfonation procedure under the relatively mild condition was successfully manufactured. The SiO@Cs-SOH catalyst was systematically characterized, especially with a large specific surface area (21.