Oxidation Desulfurization Activity of Phosphotungstic Acid Supported on Yttrium-Modified USY
来源期刊：JOURNAL OF RARE EARTHS2007年增刊第1期
论文作者：Wang Jianlong Liu Huiru Zhou Erpeng Zhao Dishun
Key words：oxidation; desulfurization; yttrium modification; USY; thiophene; rare earths;
Abstract: Y-Modified USY was prepared by ion exchange of USY slurry with 0.01 mol·L-1 Y (NO3)3. Phosphotungstic acid (HPW) catalyst supported on USY and Y-USY was prepared by an impregnation method. The materials were characterized by NH3-TPD, XRD, and N2 adsorption. The activity for the removal of thiophene was examined in a three-necked flask. The sulfur content of model compound was tested on WK-2D microcoulometric detector. The effect of yttrium and HPW content, reaction temperature and catalysts, activation temperature on the activity of catalysts were investigated. It was shown that the oxidation activity of thiophene decreased with the increase of Y content except for the catalyst of Y 5%. HPW content had limit influence on activity of catalysts. The optimal reaction temperature and activation temperature were 40 and 320℃, respectively.
Wang Jianlong1，Liu Huiru1，Zhou Erpeng1，Zhao Dishun1
(1.School of Chemical Engineering, Tianjin University, Tianjin 300072, China;
2.School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China)
Abstract:Y-Modified USY was prepared by ion exchange of USY slurry with 0.01 mol·L-1 Y (NO3)3. Phosphotungstic acid (HPW) catalyst supported on USY and Y-USY was prepared by an impregnation method. The materials were characterized by NH3-TPD, XRD, and N2 adsorption. The activity for the removal of thiophene was examined in a three-necked flask. The sulfur content of model compound was tested on WK-2D microcoulometric detector. The effect of yttrium and HPW content, reaction temperature and catalysts, activation temperature on the activity of catalysts were investigated. It was shown that the oxidation activity of thiophene decreased with the increase of Y content except for the catalyst of Y 5%. HPW content had limit influence on activity of catalysts. The optimal reaction temperature and activation temperature were 40 and 320℃, respectively.
Key words:oxidation; desulfurization; yttrium modification; USY; thiophene; rare earths;
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