摘要
采用廉价工业原料成功制备了富B酸多级孔硅铝材料,并采用N2吸附-脱附、扫描电镜(SEM)、透射电镜(TEM)、吡啶吸附红外、NH3程序升温脱附(NH3-TPD)进行了表征。结果表明:该材料由直径约在20~30nm的初级粒子堆积形成,孔体积为0.99mL/g,可几孔径为43.2nm。与工业氧化铝相比,具有更高的酸量,同时引入了丰富的B酸中心,B/L酸比值2.2。采用该材料制备的催化裂化催化剂具有更好的重油转化能力、焦炭选择性,和更高的总液收。
Using cheap commercial raw material, a novel hierarchically porous silica-alumina material rich in Br nsted acidities are successfully prepared. The sample was characterized by N2 adsorption-desorption, SEM, TEM, pyridine adsorption IR spectra and NH 3-TPD techniques. The results indicated the material was accumulated by primary particles with diameter of 20-30 nm. The pore volume could be up to 0.99 mL/g and the most probable pore diameter was 43.2 nm. Compared to the commercial alumina, it has higher acid amount. Due to the abundant Br nsted acidities, Br nsted-to-Lewis acidity ratio was up to 2.2. FCC catalyst prepared with this porous material has higher conversion rate for heavy oil and higher coke selectivity and total liquid yield.
作者
熊晓云
高雄厚
胡清勋
赵红娟
Xiong Xiaoyun;Gao Xionghou;Hu Qingxun;Zhao Hongjuan(Lanzhou Petrochemical Research Center,PetroChina,Lanzhou 730060,Gansu,China)
出处
《精细石油化工》
CAS
北大核心
2019年第3期24-27,共4页
Speciality Petrochemicals
基金
中国石油重大科技专项(2016E-0701)
关键词
硅铝材料
多级孔
B酸
催化裂化
silica-alumina material
hierarchically porous
Br nsted acidity
catalytic cracking
