Removing Vanadium And Hydrogenation From Tahe Residue Oil

The vanadium content of Tahe residue was more than300ppm, which was morethan80%of the total metal content. First, different type of ores were select asadsorbent to remove vanadium; second, select toluene or tetralin ashydrogen-donating solvents during the oil sample hydrogenating to study the oil yield,gas production rate, residual rate and vanadium distribution under a pre-determinedoptimum conditions; third, to exploring the basic mechanisms of hydrogenation, theoil sample was divided into four-components, tetralin as hydrogen-donating solvent,the effects of temperature, pressure and catalyst for the hydrogenation of aromatic andresin is studied. The study showed that:（1） The content of vanadium and nicke in oil sample is344μg/g,carbon residueis20.21%, This shows that its processing performance is belong to difficultprocessing heavy oil;（2） Select the40-60mesh oolitic stone of second, No.5the oolitic mine stone,oolitic limonite, pyrite concentrates, pyrite and analytically pure Fe₂O₃as adsorbentsto remove-off vanadium under the adsorption process conditions. The results showedthat the vanadium is existed in porphyrin structure, the adsorbent is not only almostno adsorption removal capacity, and also failed to change the distribution of vanadiumin the hydrogenation oil, asphaltenes and residue;⑶During the hydrogenation of oil sample by adding toluene or tetralin as thehydrogen-donating solvent, which can increase the yield of hydrogenation oil andasphaltene, and reduce the rate of gas and residue, wherein tetralin is more obviousthan others. When solvent/oil ratio increases from0to0.5, the yield of hydrogenationoil increase21.75percent, the rate of gas production decrease10.13percent, the yieldof residue was reduced by11.83percent. While the distribution of vanadium in thehydrogenation oil and residue which was increased by5.11percent and decrease of7.7percent; （4） For four component separation and its properties, firstly, in order to meet thedemand for technology research, according to NB/SH/T-0509-2010, the suitablesolvent/oil ratio was10in larger capacity of oil. The four-component infrared analysisshowed that saturates were paraffin-based, aromatics were mainly1,3,5-substituted，resin and asphaltenes were composed by the mass relative larger polycyclic aromatichydrocarbons molecular and acids, esters aldehyde, ketone or phenol. Thespectrophotometric analysis results show that the vanadium was mainly existed inresins and asphaltenes, no absence in saturates and aromatics almost no vanadium.The four-component TG analysis results showed that heat pyrolysis order wassaturates＞aromatics＞resins＞asphaltenes, weight loss peak temperature were316,458.6,460.4and469.5℃;（5） For aromatic and resin hydrogenation when tetralin as solvent, the suitabletemperature for hydrogenation of aromatic and resin was430℃. When the hydrogenpressure increase from3.0MPa to6.0MPa, oil yield of aromatic and resin wasincreased by25and16percentage points, which indicating that the increase ofhydrogen pressure was benefit for aromatic and resin hydrogen thermal cracking.When5%Fe₂O₃was added, the oil yield of aromatics increased by0.99percentage,while resins reduced by9.75percentage and the residue rate increased by13.59percentage, which indicating that the catalyst was benefit for the hydrogenation ofaromatics but inhibited for resins.