通过SAPO-34分子筛笼中引入金属物种提升甲醇制烯烃反应中乙烯选择性

Translated title of the contribution: Enhancing ethylene selectivity in MTO reaction by incorporating metal species in the cavity of SAPO-34 catalysts

Jiawei Zhong, Jingfeng Han, Yingxu Wei, Shutao Xu, Tantan Sun, Xinwen Guo, Chunshan Song, Zhongmin Liu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The SAPO-34 catalysts were modified with metal cations by different processes (conventional ion exchange (CIE), template-assisted ion incorporation (TII) and alcoholic ion exchange (AIE)), systematically characterized by XRD, XRF, N 2 adsorption-desorption, UV-VIS, H 2 -TPR, EPR, SEM, EDX, XPS, NH 3 -TPD, 1 H NMR and IGA, and applied in MTO reaction. The metal cations incorporation introduces extra diffusion hindrance by metallic species located in the cavity of SAPO-34. In particular, the Zn cations-modified SAPO-34 catalysts exhibit core-shell like structure, with Si-rich and Zn-rich sublayer near the external surface, which favors the coke deposition at the beginning of MTO reaction, exerts marked impact on the diffusion of the generated products with relatively large molecular size (e.g. propylene), and significantly increases the selectivity to ethylene and the ratio of ethylene to propene in the MTO reaction.

Original languageChinese
Pages (from-to)1821-1831
Number of pages11
JournalCuihua Xuebao/Chinese Journal of Catalysis
Volume39
Issue number11
DOIs
StatePublished - Nov 1 2018

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Cations
Ethylene
Positive ions
Metals
Catalysts
Propylene
Ion exchange
Temperature programmed desorption
Coke
Paramagnetic resonance
Energy dispersive spectroscopy
Desorption
X ray photoelectron spectroscopy
Nuclear magnetic resonance
Ions
Adsorption
Scanning electron microscopy
ethylene
propylene

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Zhong, Jiawei ; Han, Jingfeng ; Wei, Yingxu ; Xu, Shutao ; Sun, Tantan ; Guo, Xinwen ; Song, Chunshan ; Liu, Zhongmin. / 通过SAPO-34分子筛笼中引入金属物种提升甲醇制烯烃反应中乙烯选择性. In: Cuihua Xuebao/Chinese Journal of Catalysis. 2018 ; Vol. 39, No. 11. pp. 1821-1831.
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abstract = "The SAPO-34 catalysts were modified with metal cations by different processes (conventional ion exchange (CIE), template-assisted ion incorporation (TII) and alcoholic ion exchange (AIE)), systematically characterized by XRD, XRF, N 2 adsorption-desorption, UV-VIS, H 2 -TPR, EPR, SEM, EDX, XPS, NH 3 -TPD, 1 H NMR and IGA, and applied in MTO reaction. The metal cations incorporation introduces extra diffusion hindrance by metallic species located in the cavity of SAPO-34. In particular, the Zn cations-modified SAPO-34 catalysts exhibit core-shell like structure, with Si-rich and Zn-rich sublayer near the external surface, which favors the coke deposition at the beginning of MTO reaction, exerts marked impact on the diffusion of the generated products with relatively large molecular size (e.g. propylene), and significantly increases the selectivity to ethylene and the ratio of ethylene to propene in the MTO reaction.",
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通过SAPO-34分子筛笼中引入金属物种提升甲醇制烯烃反应中乙烯选择性. / Zhong, Jiawei; Han, Jingfeng; Wei, Yingxu; Xu, Shutao; Sun, Tantan; Guo, Xinwen; Song, Chunshan; Liu, Zhongmin.

In: Cuihua Xuebao/Chinese Journal of Catalysis, Vol. 39, No. 11, 01.11.2018, p. 1821-1831.

Research output: Contribution to journalArticle

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T1 - 通过SAPO-34分子筛笼中引入金属物种提升甲醇制烯烃反应中乙烯选择性

AU - Zhong, Jiawei

AU - Han, Jingfeng

AU - Wei, Yingxu

AU - Xu, Shutao

AU - Sun, Tantan

AU - Guo, Xinwen

AU - Song, Chunshan

AU - Liu, Zhongmin

PY - 2018/11/1

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N2 - The SAPO-34 catalysts were modified with metal cations by different processes (conventional ion exchange (CIE), template-assisted ion incorporation (TII) and alcoholic ion exchange (AIE)), systematically characterized by XRD, XRF, N 2 adsorption-desorption, UV-VIS, H 2 -TPR, EPR, SEM, EDX, XPS, NH 3 -TPD, 1 H NMR and IGA, and applied in MTO reaction. The metal cations incorporation introduces extra diffusion hindrance by metallic species located in the cavity of SAPO-34. In particular, the Zn cations-modified SAPO-34 catalysts exhibit core-shell like structure, with Si-rich and Zn-rich sublayer near the external surface, which favors the coke deposition at the beginning of MTO reaction, exerts marked impact on the diffusion of the generated products with relatively large molecular size (e.g. propylene), and significantly increases the selectivity to ethylene and the ratio of ethylene to propene in the MTO reaction.

AB - The SAPO-34 catalysts were modified with metal cations by different processes (conventional ion exchange (CIE), template-assisted ion incorporation (TII) and alcoholic ion exchange (AIE)), systematically characterized by XRD, XRF, N 2 adsorption-desorption, UV-VIS, H 2 -TPR, EPR, SEM, EDX, XPS, NH 3 -TPD, 1 H NMR and IGA, and applied in MTO reaction. The metal cations incorporation introduces extra diffusion hindrance by metallic species located in the cavity of SAPO-34. In particular, the Zn cations-modified SAPO-34 catalysts exhibit core-shell like structure, with Si-rich and Zn-rich sublayer near the external surface, which favors the coke deposition at the beginning of MTO reaction, exerts marked impact on the diffusion of the generated products with relatively large molecular size (e.g. propylene), and significantly increases the selectivity to ethylene and the ratio of ethylene to propene in the MTO reaction.

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