生物油加氢提质中Cu基催化剂的研究

摘要

生物质快速热解制取的生物油含水含氧量高,具有黏度大、热值低、腐蚀性强等特点,不适宜直接作为燃油使用,因此,需要将生物油经加氢提质成高品质的液体燃料.选取具有代表性的生物油模型化合物糠醛为研究对象,并对其催化加氢机理进行研究.通过湿法浸渍制备了一系列Si-Al分子筛负载的不同Cu含量的催化剂,并与Cu/C、Ni/Si-Al、商业Pd/C催化剂的催化活性进行比较,研究载体、活性组分、负载量对催化剂活性的影响.结果表明,在糠醛加氢生成糠醇的反应中,Cu基催化剂具备最高的选择性.%The product of biomass fast pyrolysis is known as bio-oil which has high moisture and high oxygen content. The bio-oils are disadvantageous due to their high viscosity,low heating value,and poor tolerance to corrosion. They limit their direct application as fuel. The hydrogenation upgrading of bio-oils into high quality liquid fuel is considered as one of the most promising technologies. This paper selects representative furfural as the model compound for bio-oils to research the mechanism of catalytic hydrogenation of furfural. A series of Si-Al zeolites supported catalysts with different copper contents are prepared by wet-impregnation. The catalytic activity of Cu-based catalysts compare with Cu/C,Ni/Si-Al,and commercial Pd/C catalysts,to research the influence on the catalysts of the supports,active ingredient,and load. The results show that the Cu-based catalysts have the highest selectivity for the hydrogenation reaction of furfural into furfuryl alcohol.