| The organic molybdenum catalyst that contains S, P groups was synthesized and the process of synthesis was optimized. The research shown that proportion of synthetic catalyst's metal can achieve 9.56wt%, and yield of molybdenum element reaches as high as 80wt%. UV spectrum and IR spectrum analysis shown that the synthetic catalyst contains expected functional group, such as P=S, Mo=S, Mo=O and so on. Simultaneously, it was deduced that synthetic catalyst has a high level of oil-solubility by mixing catalyst with different solvents.The lab-scale research and evaluation were carried through the catalytic system of synthetic organic molybdenum catalyst about slurry-phase hydrocracking technology of heavy oil, using the deasphalted heavy oil (DAO) ZH01 and ZH02 as the feedstocks. Preliminary research indicated that organic molybdenum catalyst mainly existed in the form of MoS2 in hydrocracking reaction process, whose average particle size is about 5μm; XPS analysis shown that active component Mo mainly existed in one valence, the bound energy is mainly due to Mo 3d5/2 and Mo 3d3/2; LRS analysis shown that most of the active component of organic Mo catalyst is tetrahedral Mo compound, which is similar to six-square crystals of MoS2. The experimental results shown that ZH01 have lower content of saturates and higher content of resin compared with ZH02 since the difference in the properties of the raw materials, so it is difficult to occur cracking reaction, but ZH01 still maintains a favorable colloidstability instead of forming coke at a higher temperature. As a result, a same conversion could be achieved if the ZH01 was processed under a more harsh condition.The medium-sized continuous run of deasphalted heavy oil hydrocracking revealed that a high conversion of both ZH01 and ZH02 as well as a high yield of high-gravity oil can be achieved with the organic Mo catalyst through an appropriate reaction condition. The result of SimDis about ZH01 and ZH02 revealed that it is considered to be processed or modified through slurry-phase hydrocracking for the reasons that it achieved a reasonable distribution of products, a low yield (18.6wt% and 13.3wt%) of vacuum residue (>500℃) and a low yield (<0.5wt%) of toluene insoluble. |
