Influence of crystalline phase of Li-Al-O oxides on the activity of Wacker-type catalysts in dimethyl carbonate synthesis

Yadong Ge; Yuanyuan Dong; Shengping Wang; Yujun Zhao; Jing Lv; Xinbin Ma

doi:10.1007/s11705-012-1214-4

Influence of crystalline phase of Li-Al-O oxides on the activity of Wacker-type catalysts in dimethyl carbonate synthesis

Yadong Ge, Yuanyuan Dong, Shengping Wang, Yujun Zhao, Jing Lv, Xinbin Ma^*

^*Corresponding author for this work

Tianjin University

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

The catalysts supported on LiAl₅O₈ (spinel) for vapor phase synthesis of dimethyl carbonate (DMC) from methyl nitrite (MN) have been studied. Their catalytic activities on supports prepared by different methods were evaluated in a continuous reactor. The samples were characterized by powder X-ray diffraction, N₂ adsorption-desorption isotherms, fourier transform infrared spectroscopy and temperature-programmed reduction of H₂. Li/Al molar ratio and calcination temperature greatly influence the structure of crystalline phase of Li-Al-O oxides. Desirable LiAl₅O₈ (spinel) was formed at 800°C, while LiAl₅O₈ (primitive cube) formed at 900°C is undesirable for the reaction. A high Li/Al molar ratio, which was related with LiAlO₂, also slowed the reaction rate. The electron transfer ability and the interaction with active component are the important properties of the spinel-based supports. The CuCl₂-PdCl₂/LiAl₅O₈ (spinel) with better electron transfer ability and low Pd²⁺ reduction temperature exhibited a better catalytic ability.

Original language	English
Pages (from-to)	415-422
Number of pages	8
Journal	Frontiers of Chemical Science and Engineering
Volume	6
Issue number	4
DOIs	https://doi.org/10.1007/s11705-012-1214-4
Publication status	Published - Dec 2012
Externally published	Yes

Keywords

Wacker-type catalyst
dimethyl carbonate
methyl nitrite
spinel

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10.1007/s11705-012-1214-4

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title = "Influence of crystalline phase of Li-Al-O oxides on the activity of Wacker-type catalysts in dimethyl carbonate synthesis",

abstract = "The catalysts supported on LiAl5O8 (spinel) for vapor phase synthesis of dimethyl carbonate (DMC) from methyl nitrite (MN) have been studied. Their catalytic activities on supports prepared by different methods were evaluated in a continuous reactor. The samples were characterized by powder X-ray diffraction, N2 adsorption-desorption isotherms, fourier transform infrared spectroscopy and temperature-programmed reduction of H2. Li/Al molar ratio and calcination temperature greatly influence the structure of crystalline phase of Li-Al-O oxides. Desirable LiAl5O8 (spinel) was formed at 800°C, while LiAl5O8 (primitive cube) formed at 900°C is undesirable for the reaction. A high Li/Al molar ratio, which was related with LiAlO2, also slowed the reaction rate. The electron transfer ability and the interaction with active component are the important properties of the spinel-based supports. The CuCl2-PdCl2/LiAl5O8 (spinel) with better electron transfer ability and low Pd2+ reduction temperature exhibited a better catalytic ability.",

keywords = "Wacker-type catalyst, dimethyl carbonate, methyl nitrite, spinel",

author = "Yadong Ge and Yuanyuan Dong and Shengping Wang and Yujun Zhao and Jing Lv and Xinbin Ma",

year = "2012",

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doi = "10.1007/s11705-012-1214-4",

language = "English",

volume = "6",

pages = "415--422",

journal = "Frontiers of Chemical Science and Engineering",

issn = "2095-0179",

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T1 - Influence of crystalline phase of Li-Al-O oxides on the activity of Wacker-type catalysts in dimethyl carbonate synthesis

AU - Ge, Yadong

AU - Dong, Yuanyuan

AU - Wang, Shengping

AU - Zhao, Yujun

AU - Lv, Jing

AU - Ma, Xinbin

PY - 2012/12

Y1 - 2012/12

N2 - The catalysts supported on LiAl5O8 (spinel) for vapor phase synthesis of dimethyl carbonate (DMC) from methyl nitrite (MN) have been studied. Their catalytic activities on supports prepared by different methods were evaluated in a continuous reactor. The samples were characterized by powder X-ray diffraction, N2 adsorption-desorption isotherms, fourier transform infrared spectroscopy and temperature-programmed reduction of H2. Li/Al molar ratio and calcination temperature greatly influence the structure of crystalline phase of Li-Al-O oxides. Desirable LiAl5O8 (spinel) was formed at 800°C, while LiAl5O8 (primitive cube) formed at 900°C is undesirable for the reaction. A high Li/Al molar ratio, which was related with LiAlO2, also slowed the reaction rate. The electron transfer ability and the interaction with active component are the important properties of the spinel-based supports. The CuCl2-PdCl2/LiAl5O8 (spinel) with better electron transfer ability and low Pd2+ reduction temperature exhibited a better catalytic ability.

AB - The catalysts supported on LiAl5O8 (spinel) for vapor phase synthesis of dimethyl carbonate (DMC) from methyl nitrite (MN) have been studied. Their catalytic activities on supports prepared by different methods were evaluated in a continuous reactor. The samples were characterized by powder X-ray diffraction, N2 adsorption-desorption isotherms, fourier transform infrared spectroscopy and temperature-programmed reduction of H2. Li/Al molar ratio and calcination temperature greatly influence the structure of crystalline phase of Li-Al-O oxides. Desirable LiAl5O8 (spinel) was formed at 800°C, while LiAl5O8 (primitive cube) formed at 900°C is undesirable for the reaction. A high Li/Al molar ratio, which was related with LiAlO2, also slowed the reaction rate. The electron transfer ability and the interaction with active component are the important properties of the spinel-based supports. The CuCl2-PdCl2/LiAl5O8 (spinel) with better electron transfer ability and low Pd2+ reduction temperature exhibited a better catalytic ability.

KW - Wacker-type catalyst

KW - dimethyl carbonate

KW - methyl nitrite

KW - spinel

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DO - 10.1007/s11705-012-1214-4

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SN - 2095-0179

VL - 6

SP - 415

EP - 422

JO - Frontiers of Chemical Science and Engineering

JF - Frontiers of Chemical Science and Engineering

IS - 4

ER -

Influence of crystalline phase of Li-Al-O oxides on the activity of Wacker-type catalysts in dimethyl carbonate synthesis

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Keywords

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