A Pd-Fe/alpha-Al(2)O(3)/cordierite monolithic catalyst for CO coupling to oxalate

作者：Gao Xiaochen; Zhao Yujun; Wang Shengping; Yin Yilin; Wang Baowei; Ma Xinbin^*

来源：Chemical Engineering Science, 2011, 66(15): 3513-3522.

DOI：10.1016/j.ces.2011.04.012

• Diethyl oxalate
• CO coupling
• Catalysis
• Monolithic
• Washcoat
• Palladium

A novel Pd-Fe/alpha-Al(2)O(3)/cordierite monolithic catalyst was prepared for the synthesis of diethyl oxalate from CO and ethyl nitrite. The palladium-based monolithic catalyst with an optimal thickness (15 mm) of Al(2)O(3) washcoat showed excellent catalytic activity and selectivity in a continuous flow, fixed-bed microreactor. The physicochemical properties of catalyst were studied by a variety of characterization techniques. Catalytic performances of Pd-Fe/alpha-Al(2)O(3)/cordierite monolithic catalysts were dependent on particle size of alumina-sol, thickness of Al(2)O(3) washcoat, pore structure, surface acidity of carrier, and distribution of active metal component on the Al(2)O(3) washcoat. Under the mild reaction conditions, CO conversion was 32% and the space-time yield of diethyl oxalate was 429 g/(Lh). Pd efficiency (DEO(g)/Pd(g)/h) of the monolithic catalyst (274 h(-1)) was much higher than that of a reference pellet catalyst (46 h(-1)), probably due to high dispersion of the Pd nanoparticles on the surface of the monolithic catalyst.

• 出版日期2011-8-1
• 单位天津大学