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| Preparation and characterization of Zr-SBA-15-SO3H solid acid catalyst and its catalytic transesterification to prepare biodiesel |
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| DOI：10.12166/j.zgyz.1003-7969/2020.01.018 |
| KeyWord:sulfonic acid functionalization SBA-15 solid acid catalyst transesterification biodiesel |
| FundProject:国家自然科学基金资助项目（21306063） |
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| Abstract: |
| Zr-SBA-15 was prepared by co-condensation-hydrothermal method with SBA-15 as supporter, then sulfonic acid group was introduced for modification by chemical grafting to obtain Zr-SBA-15-SO3H solid acid catalyst. The structure of the catalyst was characterized by XRD, FT-IR, N2 adsorption-desorption measurement, thermogravimetric analysis, SEM and TEM. The catalytic performance of Zr-SBA-15-SO3H was tested by transesterification of palm oil and methanol. The results showed that Zr doped SBA-15 had strong acidity after sulfonic acid functionalization and maintained the original morphology and mesoporous structure of SBA-15. The biodiesel yield exceeded 93% under the conditions of reaction temperature 130 ℃, reaction time 4 h, catalyst dosage 8% and molar ratio of methanol to palm oil 35∶ 1.The catalyst prepared still had higher catalytic activity with the biodiesel yield above 75% after four cycles of recycling. |
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