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| Zr-SBA-15-SO3H固体酸催化剂的制备、表征及催化酯交换制备生物柴油 |
| 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 |
| 中文关键词: 磺酸官能化 SBA-15 固体酸催化剂 酯交换反应 生物柴油 |
| 英文关键词:sulfonic acid functionalization SBA-15 solid acid catalyst transesterification biodiesel |
| 基金项目:国家自然科学基金资助项目（21306063） |
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| 中文摘要: |
| 以SBA-15为载体，采用共缩合-水热法制备Zr-SBA-15，通过化学接枝法引入磺酸基团进行改性，得到Zr-SBA-15-SO3H固体酸催化剂。采用X射线衍射、傅里叶红外光谱、N2吸附-脱附、热重分析、扫描电镜和透射电镜对催化剂的结构进行表征。以棕榈油和甲醇的酯交换反应为探针，测试Zr-SBA-15-SO3H的催化性能。结果表明：掺杂Zr的SBA-15磺酸官能化后得到的Zr-SBA-15-SO3H固体酸催化剂具有较强的酸性，且保持了SBA-15的原有形貌及介孔结构；在反应温度130 ℃、反应时间4 h、催化剂用量8%、醇油摩尔比35∶ 1的反应条件下，生物柴油收率超过93%，且制备的催化剂循环使用4次后仍具有较高的催化性能，生物柴油收率仍保持在75%以上。 |
| 英文摘要: |
| 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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