Increasing the reactivity by various physicochemical methods in the processes of hydrogenation processing of coal
DOI:
https://doi.org/10.18321/cpc468Keywords:
coal, hydrogenation, catalyst, reactivity, ozonolysis, radiation exposure, mechanical treatment, yield of liquid products.Abstract
This article presents the results of hydrogenation processing of coal from the Shubarkol deposit in the presence of natural bauxites from the Turgai deposit of the Republic of Kazakhstan. It has been found that the modification of iron-containing catalysts with additions of elemental sulfur (0.75–1.25%) makes it possible to increase the yield of liquid products to 62.3–67.3%. The positive role of preliminary ozonation of coal is shown, which makes it possible to increase the yield of total liquid products by 13.3% during hydrogenation. To reveal the effect of radiation exposure on the yield of liquid products, the coal and catalyst were preliminarily irradiated with an electron beam at an electron accelerator LU-6. In this case, the yield of liquid products increases from 54.2 wt.% to 68.5 wt.%. To identify the effect of mechanical treatment on the hydrogenation process, the initial coal was crushed in a Polymix PX-MFC 90 D mill for 15–60 min. The maximum yield is observed at 30 min treatment. The EPR method has shown that during the radiation and mechanochemical processing of coal, an increase in the concentration of CPC and ferric iron is observed. These changes in the carbon macromolecule can positively influence the hydrogenation process and lead to an increase in the yield of liquid products.
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