Study On Light-end Products Of Coal Tar With Catalytic Hydrogenation And Catalyst

Coal tar, liquid material, is generated in the process of coal retorting, pyrolysis and gasification. At present, coal tar is burn as fuel more or directly, Because of the content of sulfur and nitrogen is large in coal tar, and it is not for desulfurization and denitrification before combustion, when burning it emits large amounts of SOx and NOx, causing serious environmental pollution, and it is apart from the idea of promoting green energy currently.Over the years, many countries in the world carried out a large amount of experimental study on preparation of fuel oil from coal tar with hydrogenation. From the eighteen fifties, our country began to carry on study on preparation of gasoline, diesel oil from coal tar with hydrogenation, By nineteen ninties, with rapid development of china's economic, petroleum resource was less and less and in short supply situation, therefore, our country made thorough research on preparation of fuel oil from coal tar with hydrogenation.With coal tar as material, research studies types of main reaction in the process of hydrocracking;_Withγ-Al2O3 as the carrier, Mo, Ni for active component of hydrogenation, MoO3-NiO/γ-Al2O3 catalysts were prepared through a multi-step impregnation method. Effects of temperature, reaction pressure on hydrocracking reaction of coal tar were evaluated in an autoclave._Hydrogenation activity of 3 different catalysts of NiO contents were compared by reaction. The results of research showed hydrogenation activity of catalyst of 3.68% NiO was best and the contents of S,N,aromatic hydrocarbon in oil of reaction were low.