稀土改性SAPO-11分子筛及其异构化性能  

Rare earth modification of SAPO-11 molecular sieve and its isomerization performance

作　　者：王辰晨 樊红超 宗鹏 刘智辉 王漫云 翟佳宁 WANG Chen-chen;FAN Hong-chao;ZONG Peng;LIU Zhi-hui;WANG Man-yun;ZHAI Jia-ning(Lanzhou Petrochemical Research Center,Petrochemical Research Institute,PetroChina,Lanzhou 730060,China;Lanzhou Huanqiu Contracting&Engineering Co Ltd,PetroChina,Lanzhou 730060,China)

机构地区：[1]中国石油石油化工研究院兰州化工研究中心,甘肃兰州730060 [2]中国石油兰州寰球工程有限公司,甘肃兰州730060

出　　处：《石化技术与应用》2022年第3期177-181,共5页Petrochemical Technology & Application

摘　　要：采用过量溶液浸渍法,以硝酸镧为改性剂,对SAPO-11分子筛进行了稀土改性。结果表明:与未改性SAPO-11分子筛相比,改性后La/SAPO-11分子筛颗粒完整,具有较高的结晶度,介孔比表面积和介孔孔体积均增加,水热稳定性明显改善;在分子筛加入质量分数为6%的条件下,与ZSM-5分子筛相比,在La/SAPO-11(负载La质量分数为4%)分子筛制备的催化裂化(FCC)催化剂生产的产物中,汽油收率(质量分数,下同)与轻质油收率分别提高了0.34,0.24个百分点,汽油研究法辛烷值增加了0.5个单位;由该分子筛制备的FCC催化剂催化性能提高,异构化性能明显增强。SAPO-11 molecular sieve was modified with rare earth elements by excess solution impregnation method with lanthanum nitrate as modifier.The results showed that compared with unmodified SAPO-11 molecular sieve,the modified La/SAPO-11 molecular sieve had showed more complete particles and higher crystallinity,higher mesoporous specific surface area and mesoporous volume,and its hydrothermal stability was significantly improved.Compared with catalyst prepared with ZSM-5 molecular sieve,the gasoline yield and light oil yield of the fluid catalytic cracking(FCC)catalyst prepared by La/SAPO-11(La load mass fraction of 4%)molecular sieve,had increased by 0.34 and 0.24 percentage points respectively,and the RON had increased by 0.5 units when the mass fraction of both mentioned molecular sieves in catalysts was 6%.The FCC catalyst containing the modified above prepared molecular sieve had exhibited higher catalytic performance and better isomerization performance.

关 键 词：SAPO-11分子筛 稀土改性 催化裂化 异构化 汽油 辛烷值 

分 类 号：TE624.95[石油与天然气工程—油气加工工程]