渣油悬浮床加氢裂化与热裂化反应过程中胶体稳定性的比较

COLLOID STABILITY COMPARISON OF SLURRY-BED HYDROCRACKING WITH THERMAL CRACKING IN REACTION COURSE

考察克拉玛依常压渣油热裂化和悬浮床加氢裂化在不同反应时间的生焦量与生焦诱导期以及反应后产物的六组分质量分数及其数均相对分子质量,并利用质量分数电导率法研究了热裂化和悬浮床加氢裂化不同反应时间的胶体稳定性。结果表明,渣油悬浮床加氢裂化和热裂化两种反应体系在生焦诱导期内的胶体稳定性下降迅速,在生焦诱导期后的胶体稳定性下降趋于缓慢。在氢与加氢催化剂的作用下,渣油悬浮床加氢裂化在相同反应条件下比热裂化的生焦诱导期长,胶体稳定性好。

The coke formation and the induction period in coke formation (IPCF) of Kelamay atmospheric residue during various reaction times of thermal cracking and slurry-bed hydrocracking were investigated, and the colloid stabilities of the two reaction systems were studied by using the mass fraction normalized conductivity method. The contents and average relative molecular weights of the six compositions of the products were measured respectively in various reaction times. The result showed that the colloid stabilities of the said residue were declined rapidly in the IPCF of both reaction systems, and then the deterioration slowed down. Comparing with thermal cracking at same reaction condition, the IPCF of the slurry-bed hydrocracking of the said residue was longer and the colloid stability was better under the function of hydrogen and catalyst.