Ce改性S2O2-8/Al--Zn--O固体酸的制备和催化性能

材料研究学报, 2011, 25(5): 522-526.

Ce改性S₂O^2-₈/Al--Zn--O固体酸的制备和催化性能

潘会王君霞孟大维程明王永钱刘晓旸

1.1.中国地质大学材料科学与化学工程学院~教育部纳米矿物材料及应用工程研究中心武汉 4300742.吉林大学化学学院~无机合成与制备化学国家重点实验室长春 130012>

1.1.Engineering Research Center of Nano&ndash

基金项目: 中央高校基本科研业务费专项资金CUGL09 0227资助项目。

关键词：无机非金属材料 , Al-based solid acids , modification , esterification reaction , catalytic properties

Preparation and Catalyst Properties of S₂O^2-₈/Al–Zn–O Solid Acid Modified by Ce

PAN Hui WANG Junxia MENG Dawei CHENG Ming WANG Yongqian LIU Xiaoyang

Keywords： inorganic non-metallic materials , Al基固体酸 , 改性 , 酯化反应 , 催化性能

采用溶胶--凝胶法合成了S2O82-/Al--Zn--Ce--O固体酸催化剂, 借助IR、XRD、TG/DSC和SEM对其结构和性能等进行了表征与分析, 研究了Ce的加入对催化合成乙酸正丁酯的催化活性和重复使用稳定性的影响。结果表明, 与S2O82-/Al--Zn--O固体酸相比, S2O82-/Al--Zn--Ce--O固体酸表现出更好的重复使用稳定性, 其重复使用5次后, 酯化率仍保持在94%以上, 而S2O2-8/Al--Zn--O固体酸重复使用4次后, 酯化率降低至61%。Ce的添加提高了固体酸的抗硫流失能力和抗聚集能力, 使其重复使用的稳定性提高。

S2O2−8 /Al–Zn–Ce–O solid acid catalysts were synthesized by sol–gel. The structures and properties of the catalyst were characterized by means of infrared spectrum (IR), X–ray powder diffraction (XRD), thermogravimetric analysis–differential scanning calorimetry (TG/DSC) and scanning electron microscopy (SEM). The catalytic activities and reusabilities for the synthesis of n–butyl acetate from acetic acid and n-butanol were investigated. Compared with S2O2−8 /Al–Zn–O solid acid catalyst, S2O2−8 /Al–Zn–Ce–O solid acid catalyst exhibited better stability with above 94% esterification efficiency even after being used repeatedly for five times.

参考文献

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]
[43]
[44]
[45]
[46]
[47]
[48]
[49]	J.R.Sohn, D.C.Shin, Environmentally friendly solid acid catalyst prepared by modifying TiO2 with cerium sulfate for the removal of volatile organic chemicals, Applied Catalysis B: Environmental, 77(3&ndash

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网