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Issue 22, 2016
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Isoparaffin-rich gasoline synthesis from DME over Ni-modified HZSM-5

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Abstract

Ni-modified HZSM-5 was prepared using a wet impregnation technique and tested for isoparaffin-rich gasoline synthesis from DME (DTG). The results verified that nickel modification of HZSM-5 can evidently promote the formation of isoparaffins; the isoparaffin content of the gasoline-range hydrocarbons can increase from 42.7% to 66.3% on complete conversion of the DME. Some physical and chemical characterization methods were used, like TPR-H2, XRD, TPD-NH3 and N2 adsorption/desorption isotherm tests, and the results confirmed that the active state of the surface Ni species on HZSM-5 has great influence on the product hydrocarbon distribution from the DTG reaction. NiOx (0 < x < 1) mainly contributes to hydroisomerization of the olefins, while metal Ni0 particles promote a cracking reaction of the paraffins. The nickel modification could significantly decrease the acidic site strength but increase the acidic site numbers of HZSM-5, which in turn influences the catalytic performance of HZSM-5 for conversion of DME to hydrocarbons.

Graphical abstract: Isoparaffin-rich gasoline synthesis from DME over Ni-modified HZSM-5

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Publication details

The article was received on 25 Aug 2016, accepted on 29 Sep 2016 and first published on 30 Sep 2016


Article type: Paper
DOI: 10.1039/C6CY01818A
Citation: Catal. Sci. Technol., 2016,6, 8089-8097
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    Isoparaffin-rich gasoline synthesis from DME over Ni-modified HZSM-5

    Z. Wen, C. Wang, J. Wei, J. Sun, L. Guo, Q. Ge and H. Xu, Catal. Sci. Technol., 2016, 6, 8089
    DOI: 10.1039/C6CY01818A

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