Biodiesel has emerged as one of the best potential renewable energy sources to replace petroleumbased diesel.It can be produced by transesterification of natural fats and lower alcohol.Using a solid acid catalyst for biodiesel is relatively simple,while promoting esterification and transesterification reactions of oil with low level,highly acidic and water-containing,and does not form a saponification matter but also can avoid product separation difficulties and secondary pollution problem of waste in the traditional transesterification of acid-base homogeneous catalyst.Research heterogeneous solid acid catalysts used in biodiesel production has great significance for the emerging Chinese biodiesel industry.Various solid acids including sulfated metal oxides,sulfonic ion exchange resins,sulfonic modified mesostructured silica materials,sulfonated carbon-based catalysts,heteropolyacids and acidic ionic liquids are reviewed as heterogeneous catalysts in esterification and transesterification.
NETL
NSTL
万方数据
维普
