摘要
制备了碳硅负载氧化铌催化剂,并对其催化生物质糖转化为5-羟甲基糠醛(HMF)进行研究,对铌负载量、反应时间、反应温度、催化剂质量等影响因素进行考察。结果表明,铌负载量对催化剂酸量和催化活性及HMF选择性均有重要影响:催化剂酸量随铌质量分数增加而增加,果糖转化率也随之增加; HMF选择性随着铌质量分数增加呈现先上升后下降的变化趋势,铌负载量为5%时,HMF收率最大可达82. 8%。
Nb_2O_5/C-Si is prepared and its catalytic properties in conversion of biomass sugar to 5-hydroxymethylfurfural( HMF) are studied.The factors such as niobium oxide loading amount,reaction time,temperature and catalyst dosage are investigated. It is found the niobium oxide loading amount has important impact on the acidity amount and catalytic properties of the catalyst,and the selectivity of HMF. With the increase of niobium oxide loading amount,both the acidity amount of catalyst and the conversion rate of fructose increase while the selectivity of HMF increases firstly and decreases then.The highest yield of HMF can reach 82. 8% over 5% Nb_2O_5/P-C-Si catalyst.
引文
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