ZSM-5硅烷化改性对临氢降凝催化剂的影响  

Effect of ZSM-5 silanization modification on hydrodewaxing catalyst

作　　者：甄涛 刘丽芝 宋君辉 焦祖凯 金吉海 Zhen Tao;Liu Lizhi;Song Junhui;Jiao Zukai;Jin Jihai(CNOOC Research Center of Heavy Oil Processing Engineering Co.Ltd.,Qingdao 266500,Shangdong,China;CNOOC Research Institute of Oil and Petrochemicals Co.Ltd.,Beijing 102249,China)

机构地区：[1]中海油(青岛)重质油加工工程技术研究中心有限公司,山东青岛266500 [2]中海油炼油化工科学研究院(北京)有限公司,北京102209

出　　处：《工业催化》2019年第4期80-84,共5页Industrial Catalysis

基　　金：中国海洋石油集团有限公司课题(CNOOC-KJ 135 FZDXM 00 LH 002 LJY-2018)

摘　　要：采用液相沉积法对ZSM-5分子筛进行硅烷化改性,以改性后的分子筛为原料制备了变压器油临氢降凝催化剂,通过N_2-BET、NH_3-TPD和By-IR等方法对催化剂进行表征。以环烷基原油加氢改质柴油为原料油,在固定床反应器上对催化剂进行性能评价。结果表明,通过控制SiO_2的沉积位置和沉积量,可以降低外表面酸性、修饰孔口尺寸,阻止非择形裂解反应,提高反应的择形性能。在反应温度280℃、压力8 MPa、空速1.0 h^(-1)和氢油体积比500∶1的条件下,使用自制的催化剂,可得到倾点小于-50℃的40~#变压器油馏分。Silanization of ZSM-5 molecular were prepared by liquid deposition method.Then hydrodewaxing catalyst for transformer oil was prepared from the modified zeolite,and characterized by N 2 -BET,NH 3 -TPD and By-IR.The performance of catalyst was evaluated in a fixed-bed reactor using naphthenic hydro-upgrading diesel as raw material. The results show that by controlling the deposition position and deposition amount of SiO 2 ,outer surface acidity can be reduced, pore size can be modified,and the non-shape selective pyrolysis reaction can be prevented so as to improve shape-selectivity.Using this catalyst,the 40# transformer oil with pour point less than -50 ℃can be obtained under the conditions of reaction temperature 280 ℃,pressure 8 MPa,space velocity 1.0 h -1 ,and hydrogen to oil volume ratio 500 ∶ 1.

关 键 词：石油化学工程 ZSM-5分子筛 硅烷化改性 临氢降凝 变压器油 

分 类 号：TE624.4[石油与天然气工程—油气加工工程]