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A Catalyst for One-step Isoparaffin Production via Fischer–Tropsch Synthesis: Growth of a H-Mordenite Shell Encapsulating a Fused Iron Core

Authors

  • Qihang Lin,

    1. State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Production of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005 (P.R. China), Fax: (+86) 592-218-6569
    2. Department of Applied Chemistry, School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555 (Japan), Fax: (+81) 076-445-6846
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  • Guohui Yang,

    1. Department of Applied Chemistry, School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555 (Japan), Fax: (+81) 076-445-6846
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  • Prof. Xiaonian Li,

    1. Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang 310032 (P.R. China)
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  • Yoshiharu Yoneyama,

    1. Department of Applied Chemistry, School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555 (Japan), Fax: (+81) 076-445-6846
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  • Prof. Huilin Wan,

    Corresponding author
    1. State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Production of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005 (P.R. China), Fax: (+86) 592-218-6569
    • State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Production of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005 (P.R. China), Fax: (+86) 592-218-6569
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  • Prof. Noritatsu Tsubaki

    Corresponding author
    1. Department of Applied Chemistry, School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555 (Japan), Fax: (+81) 076-445-6846
    • Department of Applied Chemistry, School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555 (Japan), Fax: (+81) 076-445-6846
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Abstract

Fused iron (FI), is a general Fischer–Tropsch synthesis (FTS) catalyst and can be used to convert syngas (CO+H2) into normal hydrocarbons. The syntheses of HZSM-5 or H-β zeolite-shell encapsulated catalysts for FTS have been reported previously, however, conventional zeolite-shell synthesis generally employs an organic template, which is neither economic nor environmentally benign. Here we report the synthesis, without using an organic template, of a millimeter-sized defect-free capsule catalyst covered by a MOR zeolite shell (thickness of 23 μm) on FI pellets. The capsule catalyst (HMOR/FI) exhibited excellent performance for FTS, greatly increasing the selectivity of middle isoparaffins. Compared with the pure FI catalyst, the CO conversion of the HMOR/FI capsule catalyst increased remarkably and the iso/n ratio was almost 8 times that of the pure FI catalyst. This report provides an effective route to synthesize a capsule catalyst, which can reduce costs effectively and is also more environmentally benign than the current conventional zeolite-shell synthesis.

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