Hydrogenation and coke-suppression performance of dispersed catalyst in coal/heavy oil co-processing reactions
The influence of asphaltene removal and catalyst dosage on the hydro conversion efficiency of the coal/heavy oil co-processing system using MRAR and Indonesian lignite were investigated.The solid residues after co-processing reaction were characterized by XRD,XPS,TEM,TG,13C NMR and SEM.The results show that the presence of asphaltene will promote the coking process and significantly reduce the conversion efficiency of coal in the co-processing system.When reaching the same conversion depth,the amount of catalyst required in the deasphalted oil system will be greatly reduced.For the MRAR systems with a relative high asphaltene content,the application of catalyst resulted in a decreased aromaticity of organic carbon components in the solid residues and a reduced proportion of oxy gen-containing components.Additionally,residual organic carbon components were more prone to pyrolysis,indicating an excellent hydrogenolysis effect of the catalyst on the carbon components during the reaction process.Microscopic morphology analysis of the solid residues showed that the catalysts exhibited a favorable role in inhibiting coke formation,which helps to improve the hydrogenation conversion depth of the reaction system.
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