Solid Mixed‐Metal‐Oxide Catalysts for Biodiesel Production: A Review

With the rapid economic development and increasing depletion of petroleum‐derived diesel, survival environment of the human has been a serious threat. Therefore, it is necessary to seek green, environmentally friendly, and renewable energy candidates, for which biodiesel fuel has been developed as a promising candidate for energy accommodation. Currently, the most applied approach for the production of biodiesel involves the esterification and/or transesterification reaction. Among various catalytic processes, heterogeneous catalysts are promising and receiving increasing attention due to the easy separation of products and catalysts as well as the high‐purity glycerine (glycerol) byproduct that avoids significant waste emissions and effectively reduces the environmental pollution. In this Review, an attempt is being made to review different types of catalytic systems mediated by solid mixed metal oxides for biodiesel production.