摘要
以尿素为沉淀剂,采用负压沉积沉淀法将Au负载于不同载体,分别制备了Au/HZSM-5、 Au/SiO_(2)及Au/Al2O3催化剂.采用X射线粉末衍射、透射电镜、 NH_(3)-程序升温脱附、红外羟基和原位吸附吡啶红外羟基等技术对催化剂进行了表征,探究了Au对不同载体的作用,并用脉冲微反装置评价了催化剂对正丁烷脱氢反应的性能.结果表明,相较于其他载金催化剂, Au/HZSM-5酸性较强, Au与HZSM-5相互作用后会形成Si-O(H)-Au基团,该活性相对正丁烷脱氢起到一定的促进作用.
Au/HZSM-5, Au/SiO_(2) and Au/Al2O3 catalysts were prepared by using urea as precipitator by negative pressure deposition-precipitation method in this paper. The catalyst was characterized by X-ray diffraction, TEM, NH_(3)-TPD, infrared hydroxy and in-situ adsorption of pyridine infrared hydroxyl. The catalyst was used in n-butane reaction system to evaluate the catalytic performance of the catalyst. The results have shown that Au could combine with HZSM-5 groups to form a new acidic Si-O-Au structure, and the acid strength of catalyst is obviously increased, which could promote the dehydrogenation of n-butane.
作者
高希然
迪丽努尔
方亚平
艾沙·努拉洪
GAO Xi-ran;Dilinur·Ali;FANG Ya-ping;AiSha·Nulahong(Xinjiang University,College of Chemistry and Chemical Engineering,Key Laboratory of Coal Clean Conversion&Chemical Engineering Process(Xinjiang Uyghur Autonomous Region),Urumqi 830046,China)
出处
《分子催化》
CAS
CSCD
北大核心
2021年第3期226-234,I0001,共10页
Journal of Molecular Catalysis(China)
基金
新疆维吾尔自治区重点实验室开放课题(2017D04005)
国家自然科学基金(21563028)。
作者简介
高希然,女,硕士生,研究方向:工业催化方向,E-mail:313149626@qq.com;通讯联系人:艾沙·努拉洪,E-mail:aisa705@163.com.
