摘 要:本文主要以干混法、湿混法、过量浸渍法三种不同方法制备了柴油加氢脱硫催化剂NiMo/AAC。采用红外光谱法、X-射线衍射、N2-吸附等手段对催化剂进行表征。以2%的DBT/环己烷溶液为原料,评价了不同制备方法所得催化剂的性能。实验结果发现,湿混法与干混法相比,制得的催化剂酸性更强,因湿混法在制备催化剂的时候生成了镍铝尖晶石,其活性反而不如干混法制得的催化剂。而过量浸渍法制备的催化剂活性组分负载量较大,在载体上的分散比较均匀,所以过量浸渍法制得的催化剂普遍比混合法制得的催化剂活性更高。33781 毕业论文关键词:混合法;过量浸渍法;NiMo/AAC
Effect of Preparation Methods on Catalysts NiMo/AAC for Diesel Hydrodesulfurization
Abstract:In this paper,the catalyst of diesel oil hydrogenation NiMo/AAC was prepared by dry mixing,wet mixing method and excess impregnation method in three ways.The catalysts were characterized by FT-IR,X-ray diffraction and N2- adsorption.The properties of the catalysts prepared by 2%DBT/cyclohexane were evaluated.Experimental results showed that the wet mixing method and dry mixed method compared,the stronger the catalyst acidity,due to the wet mix method in preparation of catalyst to generate the nickel aluminum spinel,its activity but not dry mixed catalyst prepared.And excessive impregnation,the catalysts prepared by loading amount is larger,the carrier dispersed more evenly,so excessive impregnation catalyst generally mixed method of catalyst activity than higher.
Key Words:Mixing;excess impregnation method;NiMo/AAC
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