表面酸性对SiO2-ZrO2催化异丁烯齐聚性能的影响
花吉祥 , 冯嘉浩 , 张欢 , 姚志龙 , 张胜红 , 雷帅 , 傅送保 , 孙培永
现代化工 ›› 2025, Vol. 45 ›› Issue (12) : 147 -152.
表面酸性对SiO2-ZrO2催化异丁烯齐聚性能的影响
Impact of surface acidity of SiO2-ZrO2 catalyst on its performance in catalyzing isobutylene oligomerization
SiO2-ZrO2 composite oxides catalysts with different ratios are prepared via co-precipitation method,and characterized by means of XRD,BET,NH3-TPD,and pyridine-IR.The catalytic performance of these catalysts for isobutene oligomerization is investigated by taking high-purity isobutene as feedstock.Results indicate that t-ZrO2 with a tetragonal crystal form can provide abundant weakly acidic sites,and the proportion of Lewis acid among these acidic sites is higher.As SiO2-ZrO2 composite oxide with a SiO2 mass fraction of 55% is served as the catalyst,the conversion of isobutene and the selectivity of diisobutylene are 80% and 72%,respectively under the conditions of 190℃ and 0.5 MPa.
异丁烯 / 复合氧化物 / SiO2-ZrO2 / 齐聚 / 二聚异丁烯
isobutene / composite oxides / SiO2-ZrO2 / oligomerization / diisobutylene
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北京市自然科学基金-昌平创新联合基金(L234019)
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