渣油高温与低温催化临氢热转化反应的初步研究

摘要

以两种减压渣油为原料,进行了减压渣油高温(460 ℃)短停留时间和低温(425 ℃)长停留时间催化临氢热转化高压釜试验.结果表明:渣油的催化临氢热转化过程以热裂化为主,同一种减压渣油,在相同裂化率下,与低温长停留时间工艺相比,高温短停留时间反应得到汽柴油的硫脱除率及柴油的链烷烃收率低,但甲苯不溶物收率高.%Thermal crackings of KWTVR and YZVR were each investigated by autoclave with hydrogen and catalyst at 460 ℃,shorter residence time and 425 ℃,longer residence time.The results show that the thermal cracking is the primary reaction in the residue thermal conversion in hydrogen.For the same kind of residue and at similar conversion,the sulfur and nitrogen removal rates of gasoline and diesel,and alkanes yield are all lower,while the yield of toluene insoluble is higher at conditions of high cracking temperature and shorter residence time,compared with lower temperature and longer residence time.