Abstract
Joint conversion of the propane–butane fraction of gaseous С3–С4 alkanes and straight-run naphtha by involving them in the joint isomerization–disproportionation process on Ме/Н–N–SO42–/ZrO2 composite catalytic systems, where N is MOR or MFI zeolite or Al2O3, was studied at atmospheric pressure in the interval 160–240°С. The catalyst of the composition 0.4Со/HZSM-5/SO42– (2.0)–ZrO2 at 180°С allows up to 63.5% of gaseous C4– alkanes to be involved in isomerization–disproportionation processing of the mixture of straight-run naphtha and propane–butane fraction (1 : 1 by weight), the content of C5–C6 alkanes in the catalyzate to be increased by 21.4%, and the relative content of their branched isomers to be increased to 88.8%. The effect of hydrogen on the conversion of С4– and С8+ components of the mixture of straight-run naphtha and propane–butane fraction (1 : 1 by weight) was studied; an increase in the Н2/hydrocarbon ratio from 2 to 4 leads to an increase in the conversion of С4– alkanes from 63.5 to 90%. The possibility of expanding the resources for producing С5–С6 alkanes with increased content of high-octane branched components by joint processing of the propane–butane fraction and straight-run naphtha was demonstrated.
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ACKNOWLEDGMENTS
The authors are grateful to Cand. Sci. (Chem.), Leading Researcher F.A. Babaev for the assistance in analysis of reaction products.
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The study is performed in accordance with the research plan of the Mammadaliyev Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan.
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S.I. Abasov: setting the task of synthesis of composite catalysts active in isomerization–disproportionation transformations of hydrocarbon mixtures; S.B. Agayeva: analyzing and interpreting the results of conversion of straight-run naphtha, propane–butane fraction, and their mixtures; D.B. Taghiyev: suggesting the mechanisms of catalytic transformations of the mixture of straight-run naphtha and propane–butane fraction; M.T. Mamedova: collecting published data and preparing literature review, participating in the development of the analytical procedure, and performing the chromatographic analysis of reaction products; A.A. Imanova: preparing М-11 and М-2 catalysts and performing experiments on conversion of the mixture of straight-run naphtha and propane–butane fraction; A.A. Iskenderova: choosing conditions for express analysis of hydrocarbon mixture components and performing chromatographic analysis of reaction products; E.S. Isayeva: performing experiments on conversion of straight-run naphtha and its mixture with propane–butane fraction; R.R. Zarbaliyev: preparing М-12 catalyst and determining the role of the nature of the zeolite component in the formation and cleavage of bimolecular intermediates; F.M. Nasirova: preparing М-6а and М-6 catalysts and determining the role of the transition element in activation of the hydrogenolysis and hydrocracking of hydrocarbon mixture components.
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Translated from Zhurnal Prikladnoi Khimii, No. 7, pp. 909–918, January, 2021 https://doi.org/10.31857/S0044461821070136
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Abasov, S.I., Agayeva, S.B., Taghiyev, D.B. et al. Effect of Gaseous Alkanes on Conversion of Straight-Run Naphtha in the Presence of Со(Ni) (ZSM-5, MOR, Al2O3)/SO42–/ZrO2 Composite Catalysts. Russ J Appl Chem 94, 959–968 (2021). https://doi.org/10.1134/S1070427221070144
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DOI: https://doi.org/10.1134/S1070427221070144