Syntheses of Phosphorus-modified Small-pore Zeolites and Their Catalytic Performance for NH3-SCR

  • Tsunoji Nao
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University
  • Sano Tsuneji
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University

Bibliographic Information

Other Title
  • リン修飾小細孔ゼオライトの合成とNH3-SCR触媒特性

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Description

Small-pore zeolites composed of 8-memberd ring windows are one of the most attractive structure series of zeolites. They exhibit high catalytic performance in the selective catalytic reduction of NOx with ammonia for purification of diesel emission and the light olefin production from methanol. As these processes are performed at high reaction temperatures in the presence of steam, however, an improvement in the thermal and hydrothermal resistance of zeolites is a critical issue for developing high-performance zeolite catalysts with high catalytic activity and selectivity. Here we report syntheses of phosphorus-modified small-pore zeolites with high thermal/hydrothermal stability by hydrothermal conversion of FAU zeolite in the presence tetraalkylphosphonium cations as both organic structure directing and phosphorus modifying agents. We succeeded in synthesizing various phosphorus-modified small-pore zeolites with different framework structures and the phosphorus modification degree could be controlled. It was also found that the phosphorus-modified small-pore zeolite catalysts exhibited good catalytic durability and hydrothermal stability on NH3-SCR process.

Journal

  • ゼオライト

    ゼオライト 35 (3), 92-100, 2018-07-15

    Japan Association of Zeolite

Details 詳細情報について

  • CRID
    1390845713023874560
  • DOI
    10.20731/zeoraito.35.3.92
  • ISSN
    09187774
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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