催化裂化油浆对渣油的改性机理

acuum residuum is mixed with FCC slurry oil and the mechanism of residuum modification FCC slurry oil is studied.In the course of mixed residuum with FCC slurry oil,there are two competitive processes of solution and adsorption.The solution process means that some components with similar structure and solubility parameter from FCC slurry oil and residuum will dissolve in each other and small molecules will be freed from the surface of big molecules;The adsorption process means that asphaltene adsorbs molecules with polarity similar to and some molecules with similar surface structure adsorb on each other with small particles aggregating into big ones.The process of solution is balance with process of adsorption.When the ratio of FCC slurry oil is lower;while the process of adsorption predominates,when the ratio of FCC slurry oil is higher.The combination of the two competitive processes changes the composition and compatibility of residuum colloidal system,which leads to the decrease of solvent power and stability of residuum.The properties of mixed residuum that change with temperature should be further studied.

丙烷脱沥青油的催化裂化性质研究

在前期丙烷脱沥青工艺得到不同脱沥青油的基础上,通过固定流化床反应装置,在反应温度490℃,剂油质量比为5(催化剂为80g),空速15h-1的实验条件下,研究了脱沥青油的催化裂化性能。结果表明,饱和分质量分数最高的减压渣油的丙烷脱沥青油是很好的催化裂化原料;减压渣油和减压渣油掺兑催化油浆所得的丙烷脱沥青油也具有较好的轻油选择性和产物分布;但催化油浆的丙烷脱沥青油作催化裂化原料时,其转化率、轻油收率最低,裂化性能较差。

脱沥青油的催化裂化性质研究

在反应温度510℃,剂油比Cat Oil=5(催化剂为5g),空速LHSV=15h-1的实验条件下于重油微反装置中对几种脱沥青油的催化裂化性能进行了研究,并与掺兑减压渣油的VGO(减压馏分油)的裂化性能进行了对比。研究发现,减压渣油和掺兑催化油浆的减压渣油的丙烷脱沥青油具有较好的产物分布和选择性;而催化油浆的脱沥青油的裂化性能较差。

常压渣油与煤共炼的研究

对常压渣油和煤的性质进行系统分析,在此基础上本文将常压渣油与原料油混合后,开展常压渣油与煤共炼的研究,考察了温度、压力、空速等关键工艺参数对常压渣油与煤共炼稳定性及转化效果的影响。通过研究得出常压渣油与煤油共炼之间具有一定的协同作用。对工艺条件的探索,筛选出常压渣油与煤共炼在悬浮床加氢裂化装置中最适宜的转化效果及工艺条件,保证了悬浮床加氢装置的平稳运行及高效转化和轻油液体收率。