Sun Gui-da

Liaoning Shihua University

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Ni Xinbo

Shanghai Institute of Applied Physics

Yan Fushan

Liaoning Provincial Bureau of Quality and Technical Supervision

Gao Jun-Bin

Zhijun Zhou

Affiliated Hospital of Southwest Medical University

Fan Xiu-Ju

Beijing Institute of Petrochemical Technology

Cuiqing Li

Beijing Institute of Petrochemical Technology

YU Ting-yun

Liaoning Shihua University

Ren Li-guo

China First Heavy Industries (China)

Xiaofei Tian

South China University of Technology

Jianhua Zhu

Sichuan University of Science and Engineering

Cooperative Institutions

Liaoning Shihua University

Wuhan University

Beijing Institute of Petrochemical Technology

Liaoning University

Shanghai Institute of Applied Physics

Academia Sinica

Technical University of Munich

Liaoning Provincial Bureau of Quality and Technical Supervision

American Petroleum Institute

Affiliated Hospital of Southwest Medical University

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Preparation and Characterization of Molybdenum Carbides

Journal of Inorganic Materials (2007)

Jin Guang-zhou Fan Xiu-Ju Sun Gui-da Gao Jun-Bin Jianhua Zhu

Characterization

10.3724/sp.j.1077.2007.00504

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TG-DTA on the Nitriding Process of Nitrided NiW Hydrotreating Catalysts

Journal of Petrochemical Universities (2004)

Xiaofei Tian Zhijun Zhou Sun Gui-da

Through the TG-DTA in-situation experiments of single metal oxide, bimetallic oxide, supported or unsupported oxide and industrial catalysts G1 of nickel and tungsten nitrided in the mixture gas of hydrogen and nitrogen and passivated in air, the influence factors such as the react temperature, the ratio of hydrogen and nitrogen, the intermedia and the promoter which had influence on nitriding reaction were studied. The results show that WO_3 can be nitrided in the mixture gas of hydrogen and nitrogen, and that the process of the nitriding reaction can be divided into two steps. WO_3 could be nitrided to W_2N in the mixture gas in which the volume ratio of hydrogen and nitrogen is (4～5)∶1 and at the temperature 650 ℃. At another ratio of hydrogen and nitrogen the intermedia WO_2 and WO_XN_Y could be formed. WO_XN_Y can be easily nitrided to W_2N than WO_2.The nitriding temperature decreases 100 ℃ when Ni is introduced to the catalyst as a promoter.The interaction of the supporter γ-Al_2O_3 and the nitride species can result in the nitriding of the catalyst to be one-step reaction. W_2N is able to be oxided at its surface and can not be burned in the air and at room temperature. So W_2N is not necessary to be passivated. The industrial catalysts G1 can be nitrided by using the method mentioned.

Bimetallic strip

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PREPARATION CONDITION AND HYDROGENATION CAPACITY ON THE NOVEL TUNGSTEN PHOSPHIDE CATALYST

Journal of Petrochemical Universities (2004)

Cuiqing Li Sun Gui-da

As a new kind of hydrogenation catalyst, the effect of preparation condition on the structure of tungsten phosphide catalyst was studied. The characterization result reveals that reduced temperature is the major factor compared with reduced hydrogen flow and reduced time. On the suitable condition, the supported and unsupported tungsten phosphide catalyst were prepared by co-impregnation method, and their hydrodesulfurization and hydrodenitrogenation were investigated. The results show that the supported catalysts are favorable to increase the HDS and HDN ration, and higher temperature is favorable to the HDS, while lower temperature is favorable to the HDN. At 300 ℃, the HDS and HDN ration of supported tungsten phosphide catalyst are 49.32% and 72.97%, respectively. While at 340 ℃, HDS and HDN ration are 84.98% and 70.49% , respectively. The tungsten phosphide catalyst is a better hydreodenitrogenation catalyst.

Hydrodenitrogenation

Phosphide

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Characterization of Different Surface Mo Species in Mo/AI2O3 Catalysts by Time Differential Perturbed Angular Correlation

Studies in surface science and catalysis (1993)

Sun Gui-da YU Ting-yun Yan Fushan Ren Li-guo Ni Xinbo

10.1016/s0167-2991(08)64561-9

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SURFACE PROPERTIES AND HYDRODENITROGENATION ACTIVITY OF NiWN_x/γ-Al_2O_3 CATALYST

Acta Petrolei Sinica (Petroleum Processing Section) (2005)

Sun Gui-da

The nitride catalyst of NiWN_x/γ-Al_2O_3 was synthesized by impregnation and blend method and nitrided with N_2-H_2 mixture in process of temperature programmed reduction. The nitrification of catalysts was investigated by TG-DTA and the surface properties of catalysts were characterized by BET, XRD and XPS techniques. The hydrodenitrogenation (HDN) activity of pyridine over the catalyst was examined. The results showed that the BET area of the catalyst was 187 m~2/g. There was a certain amount of oxygen element on the surface of the passivated catalysts. The surface species could be composed of tungsten oxynitrides including W~(6+), W~(4+) and W~0-W~(2+) species. But the crystal structure of catalysts did not change in passivation process. The HDN activity of the catalysts synthesized by impregnation was obviously higher than that by blend. The highest denitrification percent was 98.4% at reaction temperature of 360℃. During the 14 h HDN reaction the NiWN_x/γ-Al_2O_3 prepared by impregnation showed the high and stable activity and was a kind of useful catalyst with potential value in industry, while the denitrification percent of NiWN_x/γ-Al_2O_3 prepared by blend method was reduced after 6 h reaction.

Hydrodenitrogenation

BET theory

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MeZrAPO-5 MOLECULAR SIEVES AS SOLID ACID CATALYSTS IN LINEAR ALKYLBENZENE SYNTHESIS I.Synthesis of the Catalyst and Its Affecting Factors

Acta Petrolei Sinica (Petroleum Processing Section) (2002)

Sun Gui-da

A series of zirconio-aluminophosphate molecular sieves(MeZrAPO-5) as solid acid catalysts in alkylation of benzene with linear olefins were synthesized by using the hydrothermal synthesis method. The MeZrAPO-5 molecular sieves have the same structure as AlPO 4-5 in which some P and Al atoms were isomorphously substituted by Zr and at least one of B,Si,Ga,Ge,Fe,Sn and Mg elements. The removal of template from molecular sieves and the effects of crystallization temperature, crystallization time, substituted atoms and three kinds of boehmite raw materials on the synthesis were investigated and discussed. The optimum conditions of crystallization as well as for template removal were proposed. The results showed that crystallization temperature higher than 150 ℃, n(TEA)/n(Al 2O 3)≥1.5 and the addition of Zr atoms were favorable to the formation of the MeZrAPO-5 crystal phase. The MeZrAPO-5 synthesized by using boehmites with small crystal size and high purity resulted in higher crystallinity.

Boehmite

Hydrothermal Synthesis

Crystal (programming language)

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