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Progress in Chemistry DOI: 10.7536/PC231005   Next Articles

The Space Confinement Effect of Catalytic Materials and Its Application in Low Temperature Denitration

Wei Zhang1,2*, Qiao Wu1,2, Yehao Fu1,2, Yaocheng Liang1,2, Min Ruan1,2, Yanshan Yin1,2, Shan Chen1,2   

  1. 1. School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, China;
    2. Renewable Energy Power Technology Key Laboratory of Hunan Province, Changsha 410114, China
  • Received: Revised:
  • Contact: *e-mail: weizhang@csust.edu.cn
  • Supported by:
    The work was supported by National Natural Science Foundation of China (No.52006016); Hunan Natural Science Foundation (No.2023JJ30047,2021JJ40573,2020JJ4098); key project of scientific research project of Hunan Provincial Department of Education (No.21A0216); excellent Youth Project of Hunan Provincial Department of Education (No.202B041,No.22B0291); changsha Natural Science Foundation (No.kq2014104 ); the Young Teachers ' Growth Plan Project of Changsha University of Science and Technology (No.2019QJCZ044).
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The spatial confinement effect of porous materials can change the surface electron distribution and electron transport performance, realize the local reaction in the micro-nano pore domain, effectively prevent the external environment from affecting the active substances in the confined space, and inhibit the agglomeration of the active center, which is an effective way to strengthen the denitrification performance of the catalyst. This paper focuses on the changes of surface energy, periodic boundary conditions and electronic energy levels of different catalytic materials, and discusses the formation mechanism of spatial confinement effect. The effects of confinement effect on the dispersion of active species, redox ability and molecular adsorption strength in the reaction process and the regulation strategies of size effect, encapsulation effect and molecular sieve effect in confinement effect were described. The strengthening effects of confined catalysts on NH3 adsorption performance, reaction selectivity, anti-toxicity and denitrification activity in the denitrification process were summarized. Finally, the development prospect of confined denitrification catalysts was prospected.
Key words: porous materials, confinement effect, catalytic mechanism, regulation strategy, low temperature denitration

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