Method for using low-temperature plasma to prepare supported metal sulfide catalyst

A technology of metal sulfide and low-temperature plasma, which is applied in the field of material science, can solve problems such as increased operating costs, agglomeration of active phases, and reduced dispersion, and achieves the effects of short preparation time, small particle size, and high dispersion

Inactive Publication Date: 2014-01-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the vulcanization process of metal oxides can be carried out at lower temperatures, the reaction is very slow due to kinetic limitations
Although a higher temperature increases the vulcanization rat

Method used

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  • Method for using low-temperature plasma to prepare supported metal sulfide catalyst
  • Method for using low-temperature plasma to prepare supported metal sulfide catalyst
  • Method for using low-temperature plasma to prepare supported metal sulfide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 3 grams of γ-Al with a particle size of 40-60 mesh 2 o 3 carrier, take 0.80 g of Cd(NO 3 ) 2 4H 2 O was dissolved in 3 ml of deionized water, the solution was slowly dropped into the carrier and stirred evenly, impregnated at room temperature for 8 hours, and then dried in an oven at 120 °C for 12 hours, the obtained catalyst precursor was marked as Cd(NO 3 ) 2 / Al 2 o 3 .

Embodiment 2

[0028] Weigh 3 grams of SiO with a particle size of 40-60 mesh 2 carrier, take 0.80 g of Cd(NO 3 ) 2 4H 2 O was dissolved in 3 ml of deionized water, the solution was slowly dropped into the carrier and stirred evenly, impregnated at room temperature for 8 hours, and then dried in an oven at 120 °C for 12 hours, the obtained catalyst precursor was marked as Cd(NO 3 ) 2 / SiO 2 .

Embodiment 3

[0030] Take by weighing 3 grams of particle size and be the gac carrier of 40-60 purpose, get 0.80 gram of Cd(NO 3 ) 2 4H 2 O was dissolved in 3 ml of deionized water, the solution was slowly dropped into the carrier and stirred evenly, impregnated at room temperature for 8 hours, and then dried in an oven at 120 °C for 12 hours, the obtained catalyst precursor was marked as Cd(NO 3 ) 2 / C.

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Abstract

The invention discloses a method for using low-temperature plasma to prepare a supported metal sulfide catalyst and belongs to the technical field of material science. The method is characterized by including: allowing ionization of hydrogen sulfide gas or gas containing hydrogen sulfide through gas discharge to form the low-temperature plasma distributed evenly, and using the low-temperature plasma to interact with supported metal salt precursor to generate metal sulfide. Due to the fact that the catalyst is avoided from being exposed in excessively high temperature, the prepared catalyst is free of thermal agglomeration, so that the catalyst is smaller in particle size and higher in dispersity. The method is suitable for preparation of various sulfide catalysts, metal sulfide can be supported on different materials to prepare various supported catalysts. The method has the advantages of low reaction temperature, low energy consumption, short preparation time and the like. In addition, processing objects are common metal salt, wide involve range is achieved, and the prepared catalyst is applicable to various common heterogeneous reactions.

Description

technical field [0001] The invention belongs to the technical field of material science and relates to a method for preparing a supported metal sulfide catalyst by using low-temperature plasma. technical background [0002] As an important functional material, metal sulfides are widely used in the fields of optics, catalysis and magnetic devices. The current method of preparing supported metal sulfides is to impregnate the carrier with metal salts, followed by roasting (to produce metal oxides) and high-temperature vulcanization. Due to favorable thermodynamic properties and relatively weak H–S bonds, the energy barrier for metal oxide sulfidation is usually small. Although the vulcanization process of metal oxides can be carried out at lower temperatures, the reaction is very slow due to kinetic limitations. Although the higher temperature increases the vulcanization rate, high temperature operation increases the operating cost and also leads to the agglomeration of the a...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J27/043B01J27/051B01J27/047B01J29/46B01J29/44B01J29/48B01J29/70B01J29/76B01J29/74B01J29/78B01J37/34B82Y30/00B82Y40/00
Inventor 王安杰赵璐孙志利王瑶李翔
Owner DALIAN UNIV OF TECH
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