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Preparation method of high-performance supported metal silicide catalyst and application thereof

A metal silicide, supported technology, applied in the field of catalysis science and technology, can solve the problem of not synthesizing high-performance and high-dispersion loaded silicide catalytic materials, and achieve excellent catalytic activity and selectivity, simple operation and easy control

Active Publication Date: 2010-03-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there has been no report on the synthesis of high-performance and highly dispersed silicide-supported catalytic materials.

Method used

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  • Preparation method of high-performance supported metal silicide catalyst and application thereof
  • Preparation method of high-performance supported metal silicide catalyst and application thereof
  • Preparation method of high-performance supported metal silicide catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 3.0gCo 2 (CO) 8 Add to the glass bottle, take 13.5g SiHCl 3 Add it into a glass bottle and mix, stir and react for two hours at low temperature. After removing excess organic silicon compound at room temperature, the product is gray brown powder. Move it into a sublimation device, heat and sublimate, and you can see yellow needle-like crystals Generated, took out and weighed 3.65g, the yield was 70%, and sealed for storage.

Embodiment 2

[0027] Weigh 1.0gFe 3 (CO) 12 and 13.5g SiHCl 3 , at N 2 Added to the autoclave under protection. Put the autoclave into an oil bath, heat to 120°C, and keep the temperature constant for 36 hours. Then remove the excess organosilicon compound to obtain a yellow powder, put it into the sublimation device, heat and sublimate, you can see light yellow needle-shaped crystals, and continue to sublimate to get light green granular crystals, take it out and weigh 0.3g, the yield is 60%, and it is sealed and stored.

Embodiment 3

[0029] Weigh 0.5 g of SiO pretreated at 500 °C in a muffle furnace 2 Carrier, placed in a fluidized bed reactor, weighed 0.15g of the metal organocobalt silicon compound precursor, argon as the carrier gas, sublimated at 40°C, and the precursor was loaded on SiO 2 On the thermal decomposition of 500 ℃ to obtain the supported metal cobalt silicide.

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Abstract

The invention discloses a preparation method of a high-performance supported metal silicide catalyst and application thereof, and belongs to the field of catalytic science and technology. In the catalyst, silicon atoms enter metal lattices, and cause the metal lattices to be expanded and metallic bond length to be increased, and structural changes, physical property changes and the like provide metal silicides with special catalytic properties. The preparation method comprises the following steps: a carbonyl compound and an organic silicon compound are used as raw materials, and a metal organic silicide precursor is obtained after low temperature reaction and purification by sublimation; and the metal organic silicide precursor is sublimated to a carrier in a fluidized bed reactor for metal organic chemical vapor deposition, thus obtaining the high-performance supported metal silicide catalyst. The catalyst can be applied to multi-phase hydrogen-related catalytic reactions such as naphthalene hydrogenation, selective hydrogenation of alkyne or diene, hydrodesulfurization and hydrodenitrogenation reactions. The preparation method solves the problem of low surface area of metal silicides prepared by traditional methods, and has advantages of simple operation and easy control.

Description

technical field [0001] The invention belongs to the field of catalysis science and technology, and relates to a high-performance supported metal silicide catalyst, a preparation method and an application thereof. Background technique [0002] Catalysis is one of the key and core technologies in chemical and chemical production. It plays an irreplaceable and important role in the fields of ammonia synthesis, petroleum refining and chemical industry, synthesis of fine chemicals, preparation of polymer materials, and environmental protection technology. According to statistics, more than 80% of chemical and chemical processes involve catalytic technology, and the development and major progress of catalytic technology depend on the discovery and development of new catalytic materials. [0003] Metal silicide is a type of compound with special physical and chemical properties formed after silicon atoms enter the metal lattice. It has low resistivity and excellent high temperature...

Claims

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Application Information

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IPC IPC(8): B01J37/00B01J23/75B01J23/745B01J21/06B01J29/03C07C13/48C07C5/11C10G45/36C07C15/46C07C5/09
Inventor 梁长海赵安琪管婧超陈霄
Owner DALIAN UNIV OF TECH
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