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| 超强钙基固体碱催化三组分体系高效制备无甘油生物柴油 |
| Super calcium-based solid base catalyzed tri-component system for efficient preparation of biodiesel without glycerol |
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| DOI： |
| 中文关键词: 生物柴油 固体碱 三组分体系 |
| 英文关键词:biodiesel solid base tri-component system |
| 基金项目: |
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| 中文摘要: |
| 采用浸渍法制备K2CO3/CaO固体碱催化剂，考察其催化甲醇-油脂-碳酸二甲酯三组分耦合反应体系制备无甘油生物柴油的性能。结果表明：在浸渍时间8 h、碳酸钾负载量5%、焙烧温度600?℃时，该固体碱催化剂在常压回流、n(油)∶?n(酯)∶?n(醇)为1∶?1∶?8、催化剂用量15%的条件下，反应60 min生物柴油产率可达97.88%；反应得到的未经处理的生物柴油中游离甘油的含量仅为0.019 62%。采用TG、BET、SEM、CO2-TPD及XRD等技术对该催化剂进行了表征发现，催化剂的高活性与碳酸钾和氧化钙经高温焙烧产生两个新的碱性位点有关。 |
| 英文摘要: |
| 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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