The Role of Various Modified USY Molecular Sieves in the Generation of Monocyclic Aromatic Hydrocarbons from Coal Pyrolysis
In order to increase the production of monocyclic aromatic hydrocarbons in coal pyrolysis reactions,a Fe and Mo dual component improved metastable Y-type molecular sieve catalyst for coal pyrolysis reactions and a coal pyrolysis reaction prediction model based on improved backpropagation algorithm were designed.The test showed that the cumulative sample proportion of the pre-diction model in the test group with RMSE less than 10.0 was 72.0％,higher than the comparison model.This model can more accu-rately predict coal pyrolysis reactions and use it to adjust the parameters in the experiment.The experimental results showed that the larger the Fe2O3 impregnation amount,the higher the content of monocyclic aromatic hydrocarbons after the reaction.When the Fe2O3 impregnation amount was 9％,the corresponding monocyclic aromatic hydrocarbon content in the tar was 7.20％,higher than all con-trol groups,and the pyrolysis was completed at 37th seconds after the experiment began,which was also shorter than all control groups.The experimental results indicate that the modified molecular sieve designed in this design can play a role in increasing the yield of monocyclic aromatic hydrocarbons during coal pyrolysis.
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