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Issue 5, 2014
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Combining wet impregnation and dry sputtering to prepare highly-active CoPd/H-ZSM5 ternary catalysts applied for tandem catalytic synthesis of isoparaffins

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Abstract

Tuning hydrocarbon distribution in Fischer–Tropsch synthesis is greatly challenging. By employing three different pathways to deposit trace palladium on Co/H-ZSM5 catalyst, tunable isoparaffin and olefin selectivity was successfully achieved. The impregnated Pd showed poor promotion of Co dispersion and reducibility, producing a slight enhancement of FTS activity and isoparaffin selectivity. The unique mechanical stir during Pd sputtering induced re-dispersion of impregnated Co/H-ZSM5 particles and Pd was deposited with an intimate distance to Co species and with a weak interaction combining zeolite, due to which complete hydrogenation of olefins was achieved. The surface enriched Pd on pre-sputtered Co catalyst was inclined to form Pd–Co nano-alloys, suppressing the chain growth activity by excessive hydrogenation process.

Graphical abstract: Combining wet impregnation and dry sputtering to prepare highly-active CoPd/H-ZSM5 ternary catalysts applied for tandem catalytic synthesis of isoparaffins

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Publication details

The article was received on 24 Dec 2013, accepted on 22 Jan 2014 and first published on 23 Jan 2014


Article type: Paper
DOI: 10.1039/C3CY01091K
Citation: Catal. Sci. Technol., 2014,4, 1260-1267
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    Combining wet impregnation and dry sputtering to prepare highly-active CoPd/H-ZSM5 ternary catalysts applied for tandem catalytic synthesis of isoparaffins

    J. Sun, W. Niu, A. Taguchi, T. Abe, Y. Yoneyama and N. Tsubaki, Catal. Sci. Technol., 2014, 4, 1260
    DOI: 10.1039/C3CY01091K

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