分散型环烷酸钴催化剂的制备及其在重油悬浮床加氢裂化中的应用  

Preparation of Dispersive Cobalt Naphthenate Catalyst and Its Application in Suspended-Bed Hydrocracking of Heavy Oil

作　　者：李传[1] 尚猛[1] 邓文安[1] 阙国和[1] 

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东青岛266555

出　　处：《石油化工》2011年第5期506-510,共5页Petrochemical Technology

基　　金：山东省自然科学基金青年基金项目ZR2009BQ012)

摘　　要：采用皂化反应和复分解反应合成了适用于重油悬浮床加氢裂化反应的分散型环烷酸钴催化剂,并优化了合成条件;通过光学显微镜、激光粒度仪、XRD和SEM方法对硫化后的催化剂进行了表征;通过釜式反应评价了该催化剂在委内瑞拉380号燃料油悬浮床加氢裂化反应中的性能。实验结果表明,合成分散型环烷酸钴催化剂的优化条件为:在皂化反应中,NaOH质量分数15%,环烷酸与NaOH摩尔比1∶0.995,皂化温度95℃,皂化时间3 h;在复分解反应中,CoSO4溶液质量分数15%,以滴加方式加入CoSO4溶液,复分解反应温度90℃,复分解反应时间2 h。该催化剂硫化后颗粒分散度较大,团聚不明显,表面粗糙,有较大的比表面积,主要以立方晶系Co9S8晶型存在,并对重油悬浮床加氢裂化反应有较好的抑焦效果。A dispersive cobalt naphthenate catalyst which was used in suspended-bed hydrocracking of heavy oil was prepared through saponification and double-decomposition, and the catalyst after sulfurization was characterized by means of optical microscopy, laser scattering particle analyzer, XRD and SEM. The effect of the catalyst on the suspended-bed hydrocracking of Venezuela 380# fuel oil was studied in a autoclave. The results showed that the optimal preparation conditions for the dispersive cobalt naphthenate catalyst were mass content of NaOH 15%, mole ratio of naphthenic acid to NaOH 1 ： 0. 995, saponification temperature 95 ~C, saponification time 3 h, mass content of CoSO4 solution （distributive droplets） 15%, double-decomposition temperature 90 ℃ and double-decomposition time 2 h. The dispersive cobalt naphthenate catalyst after sulfurization had the advantages of high particle dispersion, slight particle aggregation, coarse surface and big specific surface area, and the catalyst particles mainly existed in the form of Co9S8 cubic crystal. And the catalyst showed a good ability of inhibiting coke formation.

关 键 词：分散型环烷酸钴催化剂 重油 悬浮床加氢裂化 抑制结焦 

分 类 号：TQ426[化学工程]