摘要
以HZSM-5为载体,用钼酸铵和磷酸二氢铵作钼源和磷源,硝酸锆作锆源,采用共沉淀法制备氧化态前体,采用程序升温还原法制备出负载型磷化钼催化剂,进行了XRD和BET表征。在反应温度360℃、压力2.5MPa、体积空速1.0h-1、氢油体积比400∶1的条件下,在小型固定床反应器上进行全馏分FCC汽油的芳构化反应,考察催化剂中MoP负载量、ZrO2负载量和不同钼磷摩尔比对芳构化性能的影响。结果表明,当催化剂中钼的质量分数(以MoO3计)为25%、ZrO2的质量分数为10%、n(Mo)∶n(P)=1∶1.5、反应温度为360℃时,催化剂芳构化活性最佳,液相产品中芳烃质量分数为38.37%、烯烃质量分数为18.11%,液体收率为92.52%。
Using HZSM-5 zeolite as support, ammonium molybdate, ammonium biphosphate and zirconium nitrate as the sources of molybdenum, phosphorus and zirconium respectively, an oxidized precursor was obtained by co-precipitation method, and followed by temperature-programming reduction （TPR） to form MoP/ZrO2] HZSM-5 catalyst. The prepared catalysts were characterized by XRD and BET methods. The aromatization tests of full-range FCC naphtha over MoP/ZrO2/HZSM-5 catalysts were conducted on a small-scale fixed bed reactor to investigate the effect of catalyst compositions on the catalytic performance of catalyst. Results showed that optimal aromatization performance was observed with a catalyst containing 25 % molybdenum, 10% ZrO2 and having initial Mo/Pmolar ratio of 1 ： 1.5, under the conditions of a reaction temperature of 360 ℃ ,a reaction pres- sure of 2. 5 MPa,a LHSVof 1.0 h-land H2/oil volume ratio of 400,the liquid product yield was 92. 52% and this liquid product having an aromatic mass fraction of 38. 37% and an olefin mass fraction of 18. 11%.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2011年第9期60-64,共5页
Petroleum Processing and Petrochemicals
关键词
催化裂化
汽油
芳构化
催化剂
烯烃
catalytic cracking
gasoline
aromatization
catalyst
olefin
