Catalytic Conversion of Light Hydrocarbons into Aromatic Hydrocarbons over Modified Zeolite Catalysts

Tuktin, B. T.; Nurgaliyev, N. N.; Tenizbayeva, Aliya Serikovna; Shapovalov, A. A.

doi:10.13005/ojc/330424

Cited by 4 publications

(5 citation statements)

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“…Acid characteristics of the developed catalysts were investigated by the method of temperature-programmed desorption of ammonia (Table -2). It is known that the activity of catalysts is associated with the surface structure, dispersion and state of the active centers 16,[24][25][26][27] . TEM study of the structure and state of the active centers of the synthesized catalysts was carried out.…”

Section: Physicochemical Research Of the Synthesized Catalystsmentioning

confidence: 99%

“…The structure, dispersion and state of the clusters are related to the nature of the catalyst components. In addition, the translucent aggregates (d ≈ 20.0 nm) were found, consisting of looser small particles, which can be defined as a mixture of states including the rare earth element: EO 2 , E 2 O 3 , E(MoO 4 ), MoP, SiP, and NiOOH 16 . MoSi, SiP and MoNiSi structures were also found in the composition of the catalyst associates.…”

Section: Physicochemical Research Of the Synthesized Catalystsmentioning

confidence: 99%

“…[9][10][11] In this case, more attention is paid to the development of a hydrotreating catalyst for a certain type of petroleum product. [12][13][14][15][16] This paper presents the results of a study of the catalytic hydrofining of a gasoline fraction of oil on new alumina catalysts modified with additives of metals with variable valence, ZSM-5 zeolite, phosphorus and rare earth. The percentage of modifying additives in the catalysts was as follows: nickel (NiO) -3%, molybdenum (MoO 3 ) -12%, E (rare-earth element, Ce 2 O 3 ) -1%, cobalt (CoO) -3%, tungsten (WO 3 ) -12% and phosphorus (P 2 O 5 ) -3%.…”

Section: Introductionmentioning

confidence: 99%

“…The percentage of modifying additives in the catalysts was as follows: nickel (NiO) -3%, molybdenum (MoO 3 ) -12%, E (rare-earth element, Ce 2 O 3 ) -1%, cobalt (CoO) -3%, tungsten (WO 3 ) -12% and phosphorus (P 2 O 5 ) -3%. The method of preparation such catalysts was developed by the authors earlier 16 . The catalysts were prepared by simultaneous impregnation of a mixture of aluminum hydroxide with zeolites HZSM-5 and HY, water-soluble salts of rare-earth element (E), nickel, tungsten, cobalt, molybdenum, and also phosphoric acid.…”

Section: Introductionmentioning

confidence: 99%

“…The activity of the synthesized catalysts was studied in the hydrofining of the gasoline fraction of oil. The process was carried out according to the method developed earlier and described in the works [16][17][18] . Hydrofining of petrol fractions of oil was performed with a flow installation fixed bed at temperatures of 320-400 ºC, the bulk flow rate of 2.0 h -1 , pressure 4.0 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Hydrofining of Petrol Fractions of Oil on Modified Alumina Catalysts

Tuktin¹,

Tenizbayeva²,

Omarova³

et al. 2019

RJC

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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.

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