Pt-SO4^2-/ZrO2-Al2O3固体超强酸催化剂的研究  

STUDY ON Pt-SO4^2-/ZrO2-Al2O3 SOLID SUPERACID CATALYST

作　　者：张孔远 张朋伟 杨光 刘晨光 Zhang Kongyuan;Zhang Pengwei;Yang Guang;Liu Chenguang(College of Chemical Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580)

机构地区：[1]中国石油大学(华东)化工学院,山东青岛266580

出　　处：《石油炼制与化工》2020年第12期33-40,共8页Petroleum Processing and Petrochemicals

摘　　要：采用共沉淀法制备ZrO2-Al2O3,用硫酸溶液浸渍ZrO2-Al2O3制备SO4^2-/ZrO2-Al2O3,采用等体积法浸渍氯化铂溶液制备Pt-SO4^2-/ZrO2-Al2O3固体超强酸催化剂。采用N2吸附-脱附、X射线荧光、X射线衍射、NH3程序升温脱附、吡啶吸附红外光谱等表征了不同Pt-SO4^2-/ZrO2-Al2O3催化剂的孔结构、晶相结构和酸性质,以正己烷为原料评价Pt-SO4^2-/ZrO2-Al2O3催化剂上的反应转化率和异构化活性。结果表明:Al2O3质量分数为5%、SO4^2-/ZrO2-Al2O3焙烧温度为650℃、硫酸加入量(w)为15.0%时,Pt-SO4^2-/ZrO2-Al2O3催化剂四方晶相ZrO2含量最高,总酸量和B酸酸量最多,正己烷转化率和异构化率最高。在反应温度240℃、反应压力2.0 MPa、体积空速1.0 h-1、氢油体积比700的条件下,Pt-SO4^2-/ZrO2-Al2O3催化剂上的正己烷转化率为88.72%,异构化率为80.07%。ZrO2-Al2O3 was prepared by co-precipitation method,SO4^2-/ZrO2-Al2O3 was prepared by impregnating ZrO2-Al2O3 with sulfuric acid solution,and Pt-SO4^2-/ZrO2-Al2O3 solid superacid catalyst was prepared by impregnating platinum chloride solution by equal volume method.BET,XRF,XRD,NH 3-TPD,Py-IR techniques were used to characterize the pore structure,crystal phase structure,and acid properties of different Pt-SO4^2-/ZrO2-Al2O3 catalysts.The n-hexane was used as the probe material to evaluate the conversion and isomerization activity of Pt-SO4^2-/ZrO2-Al2O3 catalysts.The results showed that when the content of Al2O3 was 5%,the roasting temperature of SO4^2-/ZrO2-Al 2O3 was 650℃,and the sulfuric acid added was 15%,the tetragonal phase zirconia content of Pt-SO4^2-/ZrO2-Al2O3 catalyst was the highest,the total acid content and the amount of B acid were the most,and both the conversion and isomerization rate of n-hexane were the highest.At 2.0 MPa,240℃,volumetric space velocity of 1.0 h-1,and hydrogen-to-oil volume ratio of 700,the conversion of n-hexane on Pt-SO4^2-/ZrO2-Al2O3 catalyst was 88.72%,the isomerization rate was 80.07%.

关 键 词：铂 氧化锆 氧化铝 催化剂 固体超强酸 异构化 正己烷 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]