渣油加氢裂化反应特性及反应机理初探

REACTION CHARACTERISTICS AND MECHANISM OF RESIDUUM HYDROCRACKING

在１００ｍｌ高压釜反应器内，用ＩＣＲ１３０Ｈ催化剂，于氢初压８５ＭＰａ、搅拌转速８５０ｒ／ｍｉｎ，反应温度３９０～４２０℃和不同的反应时间下，进行了孤岛渣油（ＧＤＶＲ）的加氢裂化反应实验。研究表明，渣油加氢裂化反应具有明显的连串反应特征；焦的产率随转化率的变化与热裂化和临氢热裂化有明显的不同，开始增加较快，逐渐趋于缓和；催化剂和氢气的存在可以有力地抑制生焦反应，同时在一定程度上也抑制了裂化反应。对孤岛渣油加氢裂化反应的简单动力学研究表明，其裂化反应属于一级不可逆反应，反应表观活化能稍大于热反应的活化能。

The Gudao vacuum residuum (GDVR) was hydrocracked in a 100ml autoclave with crashed commercial Ni-Mo catalyst within a temperature range of 390420 The characteristics of series reaction remains obviously in the residuum hydrocracking The relationship between coke yield and conversion for catalytic hydrocracking is different from thermal cracking and non-catalytic hydrocracking The present of catalyst and hydrogen can significantly inhibit the coking reaction, but simultaneously decrease the cracking rate Because the apparent activation energy of residuum catalytic hydrocracking is slightly higher than that of thermal cracking, it can be deduced that the residuum catalytic hydrocracking is essentially thermal activation reaction