CaO对Pt/C催化硬脂酸脱羧反应性能的影响

胡慧敏 程乐明 张荣 毕继诚

引用本文: 胡慧敏, 程乐明, 张荣, 毕继诚. CaO对Pt/C催化硬脂酸脱羧反应性能的影响[J]. 燃料化学学报, 2013, 41(7): 850-855. shu
Citation:  HU Hui-min, CHENG Le-ming, ZHANG Rong, BI Ji-cheng. Effect of CaO on decarboxylation of stearic acid over Pt/C catalyst[J]. Journal of Fuel Chemistry and Technology, 2013, 41(7): 850-855. shu

CaO对Pt/C催化硬脂酸脱羧反应性能的影响

    通讯作者: 张荣
  • 基金项目:

    国家自然科学基金青年科学基金(21006123). (21006123)

摘要: 以硬脂酸(C17H35COOH)脱羧为探针反应,研究了亚临界水中CaO对Pt/C催化脱羧反应性能的影响.实验表明,CaO可以促进脱羧反应,对十七烷选择性没有影响.CaO/硬脂酸物质的量比为0.5时,在330 ℃反应1 h,硬脂酸转化率由未添加CaO时的46.06%提高到66.99%.硬脂酸催化脱羧的最佳反应温度为350 ℃,高于这一温度时,烷基链上碳碳键断裂的副反应增加,导致十七烷选择性降低.亚临界水中硬脂酸脱羧反应符合一级动力学,建立的动力学方程可以较好地预测不同反应条件下十七烷的产率.根据实验结果推测,氧化钙与硬脂酸反应生成硬脂酸钙,催化剂表面的吸附态羧酸盐增加,从而提高了脱羧反应的速率.

English

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  • 收稿日期:  2013-03-19
  • 网络出版日期:  2013-05-27
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