摘要
用ＢＥＴ、ＸＲＤ、流动指示剂法、化学分析、低温正丁烷异构化反应等手段研究了制备条件对ＺｒＯ２前驱体和ＳＯ／ＺｒＯ２超强酸性能的影响．实验结果表明，采用不同的制备条件，ＺｒＯ２前驱体的比表面可相差１．８倍，ＳＯ／ＺｒＯ２的酸强度相差约１０００倍．ＳＯ／ＺｒＯ２的正丁烷异构化反应活性相差约３００倍．ＺｒＯ２最高比表面可达２４５ｍ２／ｇ，ＳＯ／ＺｒＯ２酸强度为Ｈ０≤－１．６０，２０℃时ＳＯ／ＺｒＯ２正丁烷异构化反应速率常数为１５．５×１０－３ｈ－１。
The effects of preparative conditions on the properties of ZrO2 precursor and SO /ZrO2 superacid were studied in detail by means of BET,XRD,flow Hammett indicator method, hemical analysis and butane isomerization reaction at low temperature. Under different conditions. the specific surface area of ZrO2 precursor may differ by a factor of 1.8,while the acid strength and the rate constant for butane isomerization at 20℃ of SO/ZrO2 superacid may differ approximately by a factor of 1000 and 300, respectively. When appropriate preparative conditions are selected , the maximum specific surface area of ZrO2 obtained is 245 m2/g and the maximum acid strength and rate constant for butane isomerization at 20℃ are H0≤-16. 0 and 15. 5×10-3 h-1,respectively.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第4期591-594,共4页
Chemical Journal of Chinese Universities
基金
国家基础研究重大课题
中国石油化学工业总公司发展基金
关键词
超强酸
酸强度
氧化锆
硫酸
制备
催化剂
ZrO_2 precursor.SO_4￣(2-)/ZrO2 superacid, Specific surface area, Acid strength, Activity of butane isomerization
