FUEL 152

Direct synthesis of diethyl carbonate from CO₂ and ethanol over Ce_xZr_1-xO₂ catalyst

Wei Wang, Yongguang Zhang, Xinyuan Cao, Shengping Wang, Yongli Sun, sunyongli@tju.edu.cn, and Xinbin Ma, xbma@tju.edu.cn. Key Laboratory for Green Chemical Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

The process for direct synthesis of diethyl carbonate (DEC) from CO₂ and ethanol not only produces economic chemicals with high value, but also improves environment by using CO₂ as recycled carbon resource. In this paper, direct synthesis of DEC from CO₂ and ethanol over Ce_xZr_1-xO₂ was studied. Ce_xZr_1-xO₂ (x=0.07) and CeO₂ were effective catalysts for direct synthesis of DEC from CO₂ and ethanol. The structures of Ce_xZr_1-xO₂ were varied with the Ce/Zr ratio. For Ce_xZr_1-xO₂, the phase was tetragonal with a little monoclinic at x≤0.15, stable cubic with slight modification at 0.15<x≤0.8 and cubic at x>0.8. The catalytic properties of Ce_xZr_1-xO₂ were related to the structure and acid-basic sites on the surface. At 0.15<x≤0.8, the activities of the catalysts were decreased by the formation of the strong acid-basic sites on the surface due to the metastable tetragonal phase.

Hybrid Nanotechnologies for an Enhanced CO₂ Fixation
1:30 PM-5:50 PM, Tuesday, April 8, 2008 Morial Convention Center -- Rm. 240/241, Oral

Division of Fuel Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008