摘要
分别采用传统工艺和改进工艺,以高分子材料为扩孔剂和分散剂,对氢氧化铝粉进行扩孔改性制备了氧化铝载体。以此为基础,得到了催化裂化(FCC)汽油加氢脱硫催化剂,并在反应温度为250℃,反应压力为1.6 MPa,体积空速为3.0 h^-1,氢气/原料油(质量比)为300/1的条件下,对催化剂的反应性能进行了评价。结果表明:采用传统工艺,在扩孔剂C-1(食品级)加入质量分数为30%,焙烧温度为650℃,焙烧时间为4 h的条件下,可制备平均孔径、吸水率和强度依次为6.54 nm,104.3%,118 N/cm的扩孔氧化铝载体;由其制备的催化剂与未加扩孔剂氧化铝载体制备的相比,FCC汽油的脱硫率提高了0.7个百分点,选择性因子提高了2.57个单位。采用改进工艺,当扩孔剂C-1(食品级)和分散剂丁二烯-马来酸酐共聚物加入质量分数分别为30%,1.5%时,可制备孔结构较好的扩孔改性氧化铝载体。
The reamed alumina carrier was prepared by the traditional process and improved process with polymer material as pore-expanding agent and dispersing agent to ream the aluminum hydroxide powder.Based on this,a catalyst for catalytic cracking(FCC)gasoline hydrodesulfurization was obtained.The reaction performance of the catalyst was evaluated under the conditions of reaction temperature 250℃,reaction pressure 1.6 MPa,volume space velocity 3.0 h^-1 and hydrogen/feedstock oil(mass ratio)300/1.The results showed that using the traditional process,when the 30%mass fraction of pore-expanding agent C-1(food grade)was added and then calcinated at 650℃for 4 h,a reamed alumina carrier which had average pore diameter,water absorption rate and strength of 6.54 nm,104.3%,and 118 N/cm respectively was obtained.The catalyst prepared by it was compared with that prepared by non-reamed alumina carrier,the desulfurization rate of the FCC gasoline increased by 0.7 percentage points and selectivity factor increased by 2.57 units.By using the improved process,when the C-1(food grade)and the dispersant butadiene-maleic anhydride copolymer were added at a mass fraction of 30%and 1.5%respectively,a reamed alumina carrier that had better pore structure could be obtained.
作者
张永泽
高海波
王高峰
莫治兵
姚文君
向永生
李景锋
ZHANG Yong-ze;GAO Hai-bo;WANG Gao-feng;MO Zhi-bing;YAO Wen-jun;XIANG Yong-sheng;LI Jing-feng(Lanzhou Petrochemical Research Center,PetroChina,Lanzhou 730060,China;Geermu Refinery of Qinghai Oilfield Company,PetroChina,Geermu 816000,China)
出处
《石化技术与应用》
CAS
2019年第6期391-395,共5页
Petrochemical Technology & Application
关键词
氢氧化铝
催化裂化汽油
扩孔剂
分散剂
氧化铝载体
孔结构
强度
吸水率
选择性
aluminum hydroxide
fluid catalytic cracking gasoline
pore-expanding agent
dispersant
alumina carrier
pore structure
strength
water absorption rate
selectivity
