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化工进展  2015 

氯化铁催化木糖降解制备糠醛反应动力学

DOI: 10.16085/j.issn.1000-6613.2015.01.019, PP. 108-112

Keywords: 氯化铁,木糖,糠醛,反应动力学

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Abstract:

研究了温度在443.15~483.15K时0.1mol/L氯化铁催化木糖降解生成糠醛的反应动力学过程。首先建立并验证了反应的动力学模型,根据模型得到了木糖降解、糠醛降解和缩合反应的速率常数。由阿伦尼乌斯方程拟合得到其表观活化能分别为107.94kJ/mol、65.86kJ/mol和26.36kJ/mol。结果表明,高温和较短反应时间有利于糠醛收率的提高,在反应温度483.15K、60min条件下,最大糠醛收率可达78%。

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