摘要
采用溶胶-凝胶法合成了S_2O_8^(2-)/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S_2O_8^(2-)/Al-Zn-O固体酸相比,S_2O_8^(2-)/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S_2O_8^(2-)/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。
S_2O_8（2-）/AI-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 S_2O_8^（2-）/AI-Zn-O solid acid catalyst, S_2O_8^（2-）/AI-Zn-Ce-O solid acid catalyst exhibited better stability with above 94%esterification efficiency even after being used repeatedly for five times.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2011年第5期522-526,共5页
Chinese Journal of Materials Research
基金
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基固体酸
改性
酯化反应
催化性能
inorganic non-metallic materials
Al-based solid acids
modification
esterification reaction
catalytic properties
