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Enhanced C3+alcohol synthesis from syngas using KCoMoSx catalysts: Effect of the Co-Mo ratio on catalyst performance

Xi, X., Zeng, F., Cao, H., Cannilla, C., Bisswanger, T., de Graaf, S., Pei, Y., Frusteri, F., Stampfer, C., Palkovits, R. & Heeres, H. J., 5-Sep-2020, In : Applied catalysis b-Environmental. 272, 11 p., 118950.

Research output: Contribution to journalArticleAcademicpeer-review

K-Co-MoSx catalysts varying in Co content were prepared to investigate the role of Co in this catalyst formulation for the synthesis of C3+ alcohols from syngas. The Co-MoSx precursors and the best performing K-doped version were characterized in detail and the amount of active cobalt sulfide and mixed metal sulfide (Co-Mo-S) phases were shown to be a function of the Co content. The catalysts were tested in a continuous set-up at 360 degrees C, 8.7 MPa, a GHSV of 4500 mL g(-1) h(-1) and a H-2/CO ratio of 1. The highest alcohol selectivity of 47.1%, with 61% in the C3+ range, was obtained using the K-Co-MoSx catalyst with a Co/(Co+Mo) molar ratio of 0.13. These findings were rationalized considering the amount and interactions between cobalt sulfide and Co-Mo-S or MoS2 phases. Process studies followed by statistical modeling gave a C3+ alcohol selectivity of 31.0% (yield of 9.2%) at a CO conversion of 29.8% at optimized conditions.

Original languageEnglish
Article number118950
Number of pages11
JournalApplied catalysis b-Environmental
Volume272
Publication statusPublished - 5-Sep-2020

    Keywords

  • Higher alcohols, syngas, Mo based catalysts, TEMPERATURE-PROGRAMMED REDUCTION, MOLYBDENUM SULFIDE CATALYSTS, HIGHER ALCOHOLS SYNTHESIS, SYNTHESIS GAS, HYDROTHERMAL SYNTHESIS, ACTIVATED CARBON, MIXED ALCOHOLS, HYDRODESULFURIZATION, HYDROGENATION, CONVERSION

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