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Process for preparing supported transition metal carbide catalyst

A transition metal and catalyst technology, applied in the field of carbide catalyst preparation, can solve the problems of high risk and failure of active components to fully play their roles, and achieve the effects of high dispersion, high activity and selectivity

Active Publication Date: 2006-05-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For catalyzing reactions carried out at lower temperatures (such as the typical reaction temperature of hydrodesulfurization at 673K), the supported active components cannot fully play their role
In addition, the higher the operating temperature of these flammable and explosive gases, the greater the degree of danger

Method used

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  • Process for preparing supported transition metal carbide catalyst
  • Process for preparing supported transition metal carbide catalyst
  • Process for preparing supported transition metal carbide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0030] The molybdenum-containing 15%Mo / Al prepared in embodiment 2 2 o 3 Sample, its Mo3d X-ray photoelectron spectrum as attached Figure 4 As shown, it indicates that there are molybdenum in various valence states in the sample, and the peak at Mo3d binding energy of 228.8eV corresponds to molybdenum carbide. The high-valent molybdenum present on the surface of the sample comes from the passivation process.

[0031] The molybdenum-containing 15%Mo / Al prepared in embodiment 2 2 o3 Sample, its Cls X-ray photoelectron spectroscopy such as Figure 5 As shown, in addition to free carbon, the peak at 282 eV corresponds to the binding energy of Cls in carbides.

[0032] The XRD pattern of the sample prepared by the comparative example is shown in Image 6 . The results show that when using methane to reduce and carbonize molybdenum oxide, the required temperature is about 973K (this is also the data usually reported in literature and patents) or above. with attached figure...

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Abstract

The invention relates to a method for preparing transient metal carbide catalyst, which uses aliphatic hydrocarbon and aromatic hydrocarbons of C5-C16 or their sulfur-containing and nitrogen-containing ramification as toluene and hexane as carbon source; heats the precursor of transient metal in the hydrogen gas for one or several sections of programs to 873K to be reduced and carbonized, and the attained transient metal carbide catalyst has the character of high diffusion. The inventive transient metal carbide catalyst can be used in many reactions of hydrogen transmission, especially for the hydrogenation reaction of derivative oil of petroleum fraction or coal; the hydrogenation property-transformation of petrol and the isomerization reaction of hydrocarbon.

Description

technical field [0001] The invention relates to a preparation method of a carbide catalyst, in particular to a preparation method of a transition metal carbide catalyst. Background technique [0002] Transition metal carbides are compounds called "mesenchymal alloys" formed by filling carbon atoms in transition metal lattices. In addition to excellent mechanical properties, these compounds also have similar electromagnetic properties to their parent metals. Since it was reported in the 1970s that metal carbides of group VI have catalytic properties similar to noble metals, transition metal carbides have received more and more attention and have shown excellent catalytic performance in many reactions, including Hydrofining of petroleum distillate or coal derived oil, F-T synthesis and isomerization of hydrocarbons, etc. So far, the preparation methods of carbide catalysts mainly adopt the method of temperature-programmed reduction and carbonization. The carbon source durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J37/00
Inventor 朱全力赵旭涛马洪江邓友全
Owner PETROCHINA CO LTD