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| KOH/铝柱撑膨润土催化麻疯树油酯交换反应制备生物柴油 |
| Preparation of biodiesel by transesterification of Jatropha oil catalyzed by KOH/Al-pillared bentonite |
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| DOI： |
| 中文关键词: KOH/铝柱撑膨润土 麻疯树油 酯交换反应 生物柴油 |
| 英文关键词:KOH/Al-pillared bentonite Jatro pha oil transesterification biodiesel |
| 基金项目: |
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| 中文摘要: |
| 采用等体积浸渍法制备得到KOH/铝柱撑膨润土固体催化剂，催化麻疯树油酯交换制备生物柴油，探讨KOH负载量和酯交换反应条件对生物柴油转化率的影响及催化剂再生性能，并对催化剂进行SEM、XRD表征。结果表明：KOH/铝柱撑膨润土催化剂中最佳KOH负载量为15%；最佳麻疯树油酯交换条件为反应温度75?℃、催化剂用量7%、反应时间3 h、醇油摩尔比25∶?1。在最佳条件下，生物柴油转化率为99.2%；再生处理的催化剂催化酯交换反应，生物柴油转化率高达98%；铝柱撑膨润土经由等体积浸渍KOH处理后，颗粒粒径明显减小，排列更加紧密，其表面附着有鳞片状物质，催化剂具有较大的层间距，d001层间距为11.9 nm。 |
| 英文摘要: |
| KOH/Al-pillared bentonite catalyst was prepared by the method of incipient wetness impregnation. Biodiesel was produced by transesterification of Jatropha oil catalyzed by KOH/Al-pillared bentonite. The influences of KOH loading amount and transesterification reaction conditions on the conversion rate of biodiesel and regenerability of the catalyst were studied. KOH/Al-pillared bentonite catalyst was characterized by scanning electron microscopy(SEM) and X-ray diffraction(XRD). The results showed that the optimal KOH loading amount was 15% for the preparation of KOH/Al-pillared bentonite catalyst. The optimal transesterification conditions of Jatropha oil were obtained as follows: reaction temperature 75?℃, catalyst dosage 7%, reaction time 3 h, and molar ratio of methanol to oil 25∶?1. Under these conditions, the conversion rate of biodiesel was 99.2%. The regenerated catalyst was used to catalyze the transesterification of Jatropha oil, and the conversion rate of biodiesel was 98%. KOH/Al-pillared bentonite catalyst owned small particle size and compact particle arrangement, and the sheet-shape objects were loaded on the catalyst. KOH/Al-pillared bentonite catalyst had large layer spacing, and the layer spacing of d001 was 11.9 nm. |
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