KNO3/CaO as cost-effective heterogeneous catalyst for the synthesis of glycerol carbonate from glycerol and dimethyl carbonate

- The activity of KNO3/CaO related to the basic strength and the amount of basic site.
- The basicity of KNO3/CaO depends on the KNO3 loading and calcination temperature.
- The glycerol conversion for the fresh KNO3/CaO(15%,700) catalyst reaches 99.23%.
- At the fifth recycling of KNO3/CaO(15%,700), the glycerol conversion reaches 94.95%.
- A plausible deactivation mechanism about KNO3/CaO catalyst is proposed.