Nickel-based catalyst and preparation method

A nickel-based catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of deactivation of active components and achieve low cost , reduced particle size, and excellent CO conversion

Inactive Publication Date: 2017-06-30
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problems of deactivation of active components and metal sintering caused by carbon deposition in nickel-based catalysts have troubled many researchers.

Method used

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  • Nickel-based catalyst and preparation method
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  • Nickel-based catalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The specific operation steps are as follows:

[0054] (1) Carrier selection: Wash and dry the vermiculite.

[0055] (2) Pretreatment carrier: Weigh 10g of the carrier and add it to a 500ml round-bottomed flask; then measure 200ml of hydrogen peroxide with a mass fraction of 25% and add it to the round-bottomed flask; place the round-bottomed flask on an oil bath heating at 80° C. for 6 hours in a pot; then drying at 80° C. for 15 hours, and crushing through an 80-mesh sieve to obtain a pretreated expanded vermiculite carrier. (the quality of the carrier: the volume of hydrogen peroxide=1g:20ml)

[0056] (3) Plasma treatment carrier: put the pretreated expanded vermiculite carrier into low-temperature plasma treatment equipment, set plasma voltage 60V, current 2A, and process for 40 minutes to obtain plasma-treated expanded vermiculite carrier. The plasma treatment of the carrier is the etching treatment of the carrier, which can improve the catalytic activity of the c...

Embodiment 2

[0064] The specific operation steps are as follows:

[0065] (1) Carrier selection: Wash and dry the vermiculite to obtain the vermiculite carrier.

[0066] (2) pretreatment carrier: take by weighing 10g of carrier, join in the round-bottomed flask that specification is 500ml; Then measure the mass fraction of 250ml and be 30% hydrogen peroxide, join in the round-bottomed flask; Place round-bottomed flask in oil In a bath, heat at 100°C for 4 hours; put the solution into an oven, dry at 120°C for 12 hours, and then crush it through a 100-mesh sieve to obtain a pretreated expanded vermiculite carrier. (the quality of the carrier: the volume of hydrogen peroxide=1g:25ml)

[0067] (3) Plasma treatment carrier: put the pretreated expanded vermiculite carrier into low-temperature plasma treatment equipment, set plasma voltage 80V, current 2A, and process for 30 minutes to obtain plasma-treated expanded vermiculite carrier. The plasma treatment of the carrier is the etching treatm...

Embodiment 3

[0075] The specific operation steps are as follows:

[0076] (1) Carrier selection: Wash and dry the vermiculite to obtain the vermiculite carrier.

[0077] (2) Pretreatment carrier: Weigh 10g of the carrier and add it to a 500ml round-bottomed flask; then measure 220ml of 27% hydrogen peroxide and add it to the round-bottomed flask; place the round-bottomed flask on an oil bath Heating in a pot at 90°C for 5 hours; drying the solution in an oven at 100°C for 14 hours, and crushing through a 90-mesh sieve to obtain a pretreated expanded vermiculite carrier. (the quality of the carrier: the volume of hydrogen peroxide=1g:22ml)

[0078] (3) Plasma treatment carrier: put the pretreated expanded vermiculite carrier into low-temperature plasma treatment equipment, set plasma voltage 70V, current 2A, and process for 38 minutes to obtain plasma-treated expanded vermiculite carrier. The plasma treatment of the carrier is the etching treatment of the carrier, which can improve the ca...

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Abstract

The invention provides a nickel-based catalyst and a preparation method and relates to the field of catalysts. The preparation method comprises steps as follows: vermiculite is washed and dried, and a carrier is obtained; the carrier is added to a hydrogen peroxide solution, and a mixed solution is obtained; the mixed solution is heated, dried, smashed and sieved, and an expanded vermiculite carrier is obtained; the expanded vermiculite carrier is subjected to plasma treatment, and an expanded vermiculite carrier subjected to plasma treatment is obtained; nickel salt is dissolved in water, the expanded vermiculite carrier subjected to plasma treatment is added, stirring and oil bath heating are performed, and an impregnation liquid is obtained; the impregnation liquid is subjected to freeze drying, and catalyst precursor powder is obtained; the catalyst precursor powder is subjected to plasma treatment, and the nickel-based catalyst is obtained. According to the nickel-based catalyst and the preparation method, agglomeration of active components is prevented by means of freeze drying, the catalyst precursor and the carrier are subjected to plasma treatment, so that the active components are dispersed more uniformly, and the prepared catalyst has the advantages of good catalysis effect, low loading capacity and lower consumption during using.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a nickel-based catalyst and a preparation method. Background technique [0002] With the continuous rise of international crude oil prices and the higher and higher requirements for environmental protection in recent years, the demand for natural gas has also increased rapidly. In view of my country's current one-time energy consumption structure of "poor oil, rich coal, and lack of gas", changing the traditional coal utilization method and using abundant coal resources to produce coal-based alternative energy consumption has become a shortcut to the sustainable development of my country's economy and society . Coal-to-synthetic natural gas technology (SNG), as a clean and efficient conversion technology, meets the needs of sustainable development of my country's economic energy consumption. Coal-to-synthetic natural gas technology is to produce substitute natural gas throug...

Claims

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Application Information

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IPC IPC(8): B01J23/755C10L3/08
CPCB01J23/755C10L3/08
Inventor于锋张梦娟朱明远代斌
OwnerSHIHEZI UNIVERSITY