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OALib Journal期刊
ISSN: 2333-9721
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cao对pt/c催化硬脂酸脱羧反应性能的影响
, PP. 850-855
Keywords: 氧化钙,硬脂酸,脱羧,亚临界水
Abstract:
？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1h,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.
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