Hydrofining of Petrol Fractions of Oil on Modified Alumina Catalysts

Abstract

The paper describes the study of the gasoline fraction hydrofining on the zeolite-containing alumina catalysts modified with variable valence metals, additives of phosphorus and a rare-earth element. In this work, the new zeolite-containing alumina catalysts were developed: NiO-MoO 3 -E-P-HZSM-HY-Al 2 O 3 , CoO-MoO 3 -E-P-HZSM-HY-Al 2 O 3 and CoO-WO 3 -E-P-Al 2 O 3 -ZSM, where E is a rare-earth element. The research was carried out under high-pressure at the flow installation with a fixed catalyst bed. The smallest residual sulfur content (0.0005%) is observed in hydrotreated gasoline on the catalyst CoO-WO 3 -E-P-HZSM-HY-Al 2 O 3 , which is 2-4 times lower than on the catalysts CoO-MoO 3 -E-P-HZSM-HY-Al 2 O 3 and NiO-MoO 3 -E-P-HZSM-HY-Al 2 O 3 and lower than is limited by the Euro-5 standard. When tested on the NiO-MoO 3 -E-P-HZSM-HY-Al 2 O 3 catalyst, the octane number of the gasoline as a result of hydrotreating increased to 88.6, which is significantly higher than on other catalysts. According to electron microscopy, the catalysts are highly dispersed, the components of the active phase metals are mainly in the oxidized state, forming clusters-associates on the surface. The structure, dispersion and state of the clusters are related to the nature of the catalyst components. The synthesized catalysts make it possible to produce high-octane low-sulfur gasoline that meets European standards.

Development<strong> </strong>and Testing of Modified Alumina Catalysts for Hydrotreating Petroleum Gasoline Fraction

“…The reaction process has been carried out at the common flow installation with a fixed bed (Figure 2) at temperatures of 320-400 ºC, volume rate of 2.0 h -1 and pressure 4.0 MPa by the method developed earlier in the laboratory and described in refs. [28,[31][32][33][34]. The reactor is made of a metal tube, the lower part is equipped with glass nozzles, which are filled with a layer of stationary catalyst at the required height and placed on top of another porcelain nozzle.…”

“…The sulfur content in the starting material and products was defined using SPECTROSCAN Instrument. The physico-chemical characteristics of the catalysts were studied using BET methods, TEM microscopy, and TPD of ammonia [28,[31][32][33][34][40][41][42].…”

“…Worldwide active search and development of new catalysts of deep hydrotreating of oil fractions is conducted and the production technology of motor fuels is improved. In this case more attention is paid to development of the catalyst of hydrotreating for a certain type of oil products [30][31][32][33][34][35][36][37][38][39].…”

Catalytic cracking of M-100 fuel oil: relationships between origin process parameters and conversion products

“…At present, the development of technologies for processing oil residues is relevant and promising, which is associated with an increase in the share of hard-to-recover oil reserves: heavy and high-viscosity oils in the world. This, in turn, forces refineries to select carefully the available technologies for processing oil residues and increase the share of heavy oil raw materials in the total volume of oil-processing feedstock [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. 40-45% of all high-octane gasoline is produced at catalytic cracking plants with a steamer.…”