In situ Infrared Studies of the Catalytical Synthesis of Dimethyl Oxalate from CO and CH3ONO Over Al2O3 Supported Pd-Cu Alloy Catalysts

Chem. J. Chinese Universities ›› 1997, Vol. 18 ›› Issue (5): 777.

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In situ Infrared Studies of the Catalytical Synthesis of Dimethyl Oxalate from CO and CH₃ONO Over Al₂O₃ Supported Pd-Cu Alloy Catalysts

LIANG Xian-Zhen¹, ZHAO Wei-Jun¹, YANG Rui-Hua¹, FENG Ming-Hua¹, WANG Zhong-Wen¹, MA Xin-Bin², XU Gen-Hui²

1. Department of Chemistry, Nankai University, Tianjin, 300071;
2. National None Carbon Chemistry and Engineering Key Laboratory, Tianjin University, Tianjin, 300072

Received:1996-05-06 Online:1997-05-24 Published:1997-05-24

Abstract

Abstract: The catalytical synthesis of dimethyl oxalate from COand CH₃ONOat normal pressure was investigated with in situ IRtechnique.We discovered that there was a subsidiary reaction during the formation of dimethyl oxaIate.The by-product NOcontinued to react with COto produce CO₂ and N₂O.Palladium was dispersed by copper in the alloy Pd Cu catalysts and consequently results in the increase of the linearly bound COspecies and the decrease of the multiply coordinated COspecies.The main reaction has no relation with the multiply coordinated COspecies but the subsidiary reaction firmly depends on them.The linearly bound COof 2058 cm^-1 are more active in the production of dimethyl oxalate.The possible mechanism was also discussed.

Key words: Dimethyl oxalate, Carbon monoxide, In situ IR spectra, Heterogenous catalysis

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LIANG Xian-Zhen, ZHAO Wei-Jun, YANG Rui-Hua, FENG Ming-Hua, WANG Zhong-Wen, MA Xin-Bin, XU Gen-Hui. In situ Infrared Studies of the Catalytical Synthesis of Dimethyl Oxalate from CO and CH₃ONO Over Al₂O₃ Supported Pd-Cu Alloy Catalysts[J]. Chem. J. Chinese Universities, 1997, 18(5): 777.

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In situ Infrared Studies of the Catalytical Synthesis of Dimethyl Oxalate from CO and CH₃ONO Over Al₂O₃ Supported Pd-Cu Alloy Catalysts

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