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| Super calcium-based solid base catalyzed tri-component system for efficient preparation of biodiesel without glycerol |
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| KeyWord:biodiesel solid base tri-component system |
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| Abstract: |
| The K2CO3/CaO solid base was prepared by impregnation method and its catalytic performance for biodiesel production in a tri-component system of rapeseed oil， dimethyl carbonate (DMC) and methanol was investigated. The results showed that under the conditions of impregnation time 8 h， loading amount of potassium carbonate 5%， calcination temperature 600?℃， molar ratio of rapeseed oil to dimethyl carbonate to methanol 1∶?1∶?8， dosage of catalyst 15%， reaction time 60 min and atmospheric reflux， the yield of biodiesel reached 97.88%. The content of free glycerol in biodiesel without treatment was only 0.019 62%. The catalyst was characterized by TG， BET， SEM， CO2-TPD and XRD， and it was found that the high catalytic activity of K2CO3/CaO solid base catalyst was associated with the formation of two new basic sites, which were produced by the interaction between potassium carbonate and calcium oxide during calcination. |
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