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| High efficient preparation of no-glycerol biodiesel catalyzed by high dispersion supported solid base |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.230664 |
| KeyWord:biodiesel hydrotalcite co-precipitation method solid base no-glycerol transesterification reaction |
| FundProject:陕西省重点研发计划(2023-YBGY-052)；陕西省教育厅科研计划项目(23JP133)；西安石油大学研究生创新基金项目(YCS22213106) |
| Author Name | Affiliation | | ZHENG Jingdi1 , TAO Shuang1 , ZHOU Rui1, WANG Chunhui2, TANG Ying1,3 | （1.Shaanxi Engineering Research Center of Green Low-carbon Energy Materials and Processes， Xi′an
Shiyou University, Xi′an 710065, China
2.Xi′an Changqing Tongxin Petroleum Technology
Co. , Ltd. , Xi′an 710018, China
3.Xi′an Key Laboratory of Low-carbon Utilization for
High-carbon Resources, Xi′an Shiyou University, Xi′an 710065, China） |
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| Abstract: |
| In order to produce no-glycerol biodiesel efficiently, a high dispersion supported solid base catalyst was prepared by equal volume impregnation method using MgAl hydrotalcite prepared by co-precipitation method as the carrier and K2CO3 solution as impregnating solution. The effects of type and molar ratio of metal salt on the catalytic performance of solid base in the preparation of no-glycerol biodiesel produced from tri-component (rapeseed oil, methyl acetate and methanol) were investigated. The catalysts were characterized by FTIR, XRD, TG, CO2-TPD, BET and SEM. The results showed that the solid base catalyst was prepared under the conditions of MgCl2 and AlCl3 as metal salts, Mg/Al molar ratio 3∶ 1, K2CO3 concentration 2.0 mol/L, and calcining temperature 500 ℃， and the yield of biodiesel was up to 98% and the biodiesel performance indexes met with EU standard under the conditions of oil/ester/alcohol molar ratio 1∶ 1∶ 10, catalyst dosage 10%, reaction temperature 60 ℃, and reaction time 15 min. It was found that the hydrotalcite prepared with chloride salt had large specific surface area and rich pore structure which provided more exposed basic center sites. In conclusion, the type of metal salt has greatly effect to the structure of hydrotalcite and the high dispersion supported solid base prepared with MgCl2 and AlCl3 can efficiently catalyze oil transesterification to prepare no-glycerol biodiesel. |
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