Preparation, characterization and catalytic properties of S2O82-/ZrO2-CeO2 solid superacid catalyst

被引：29

作者：

Fan Guodong ^{[1
]}

Shen Mao ^{[1
]}

Zhang Zhao ^{[1
]}

Jia Farui ^{[2
]}

机构：

[1] Shaanxi Univ Sci & Technol, Minist Educ, Key Lab Auxiliary Chem & Technol Chem Ind, Xian 710021, Peoples R China

[2] Shanxi Irico Photo Elect Mat Corp, Dept Res & Dev, Xianyang 712000, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2009年 / 27卷 / 03期

关键词：

solid superacid catalyst; S2O82-/ZrO2-CeO2; n-butyl lactate; esterification; rare earths; ESTERIFICATION; ZIRCONIA;

D O I：

10.1016/S1002-0721(08)60266-5

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A novel solid superacid catalyst S2O82-/ ZrO2-CeO2 was prepared by a coprecipitation method and characterized by means of XRD, FTIR, BET, TEM and DSC/TG analysis methods. The results indicated that incorporation of appropriate amounts of Cc into the. catalyst was beneficial to the formation of sole tetragonal ZrO2 and effectively prevented from the formation of monoclinic ZrO2, and restrained the loss of sulfated species. XRD revealed the presence of tetragonal Ce0.16Zr0.84O2 phase in the case Of S2O82-/ZrO2-CeO2 calcined above 500 degrees C. Catalytic activities Of S2O82-/ZrO2-CeO2 for the esterification of lactic acid with n-butanol was studied. The results showed that the optimum conditions were as follows: calcination temperature of the catalyst 600 degrees C, n(lactic acid):n(n-butyl alcohol)=1.0:3.0, W(S2O82-/ZrO2-CeO2)=12.0%, reaction temperature 145 degrees C, and reaction time 2 h. The esterification efficiency of lactic acid was about 96.6%.

引用

页码：437 / 442

页数：6

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