Citation: LIN Xing-yi, ZHANG Yong, YIN Ling. Effect of various precipitants on activity and thermal stability of CuFe₂O₄ water-gas shift catalysts[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(9): 1087-1092. shu

Effect of various precipitants on activity and thermal stability of CuFe₂O₄ water-gas shift catalysts

1.
National Engineering Research Center of Chemical Fertilizer Catalysts, Fuzhou University, Fuzhou 350002, China

Corresponding author: LIN Xing-yi,
Received Date: 21 May 2014
Available Online: 18 July 2014
Fund Project:

Three kinds of CuFe₂O₄ catalysts were synthesized by co-precipitation method using potassium hydroxide (A), sodium carbonate (B) and sodium bicarbonate (C) as the precipitants. Their catalytic activity and thermal stability were evaluated in water-gas shift reaction (WGSR). The microstructure and surface property of as-prepared catalysts was investigated by X-ray diffraction (XRD), N₂-physisorption, H₂-temperature programmed reduction (H₂-TPR), CO₂-temperature programmed desorption (CO₂-TPD) and cyclic voltammetry (CV). The results show that the catalyst prepared with potassium hydroxide as precipitant exhibits excellent WGSR activity. Potassium hydroxide plays an important role in promoting the generation of CuFe₂O₄, restraining growth of crystalline CuO and CuFe₂O₄, resulting in much better dispersion of CuO on the surface of catalysts, enhancing the reducibility of catalysts, and increasing the amount of weak basic sites. These factors remarkably improve the activity and thermal stability of catalysts.
- water-gas shift reaction,
- CuFe₂O₄ catalysts,
- reducibility,
- weak basic sites,
- thermal stability
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沈阳化工大学材料科学与工程学院沈阳 110142

Effect of various precipitants on activity and thermal stability of CuFe2O4 water-gas shift catalysts

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通讯作者: 陈斌, bchen63@163.com

Effect of various precipitants on activity and thermal stability of CuFe₂O₄ water-gas shift catalysts