Copper doped Ni/SiO2 nanocomposite catalyst and preparation method thereof

A nano-composite, copper-doped technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. Simple, improved specific surface area, excellent anti-carbon deposition effect

Inactive Publication Date: 2018-09-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cobalt, zirconium, molybdenum and other metals are supported on the carrier activated carbon by ultrasonic impregnation, and then dried, roasted and reduced to obtain a catalyst; although the catalyst has good catalytic activity, its main activity comes from cobalt, zirconium, molybdenum and other metals Components, the metal components in the catalyst are complex and used in a large amount, and the preparation process is cumbersome and complicated

Method used

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  • Copper doped Ni/SiO2 nanocomposite catalyst and preparation method thereof
  • Copper doped Ni/SiO2 nanocomposite catalyst and preparation method thereof
  • Copper doped Ni/SiO2 nanocomposite catalyst and preparation method thereof

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Embodiment 1

[0040] A copper-doped Ni / SiO 2 Nano composite catalyst, its preparation method comprises the steps:

[0041] 1) Weigh 25.578g Na 2 SiO 3 9H 2 O was placed in a beaker, and 84.402g of distilled water was added for ultrasonic dissolution to obtain Na 2 SiO 3 solution; dilute analytically pure concentrated nitric acid and distilled water at a volume ratio of 1:4 and add dropwise to the obtained Na 2 SiO 3 In the solution, magnetic stirring is carried out while adding dropwise, until pH=6, and mixed solution I is obtained;

[0042] 2) Weigh 2.617g Ni(NO 3 ) 2 ·6H 2 O was put into a beaker, and 13.833g of distilled water was added for ultrasonic dissolution to obtain a nickel salt solution; 0.2416g Cu(NO 3 ) 2 ·3H 2 O is put into a beaker, and 10 g of distilled water is added for ultrasonic dissolution to obtain a copper salt solution; then the obtained nickel salt solution and copper salt solution solution are added dropwise to the mixed solution I, and magnetic stirring...

Embodiment 2

[0059] A copper-doped Ni / SiO 2 Nano composite catalyst, its preparation method comprises the steps:

[0060] 1) Weigh 25.578g Na 2 SiO 3 9H 2 O was placed in a beaker, and 84.402g of distilled water was added for ultrasonic dissolution to obtain Na 2 SiO 3 solution; dilute analytically pure concentrated nitric acid and distilled water at a volume ratio of 1:4 and add dropwise to the obtained Na 2 SiO 3 In the solution, magnetic stirring is carried out while adding dropwise, until pH=6, and mixed solution I is obtained;

[0061] 2) Weigh 2.7825g Ni(NO 3 ) 2 ·6H 2 O was put into a beaker, and 14.5825g of distilled water was added for ultrasonic dissolution to obtain a nickel salt solution; 0.1208g Cu(NO 3 ) 2 ·3H 2 O is put into a beaker, and 10 g of distilled water is added for ultrasonic dissolution to obtain a copper salt solution; then the obtained nickel salt solution and copper salt solution solution are added dropwise to the mixed solution I, and magnetic stir...

Embodiment 3

[0066] A copper-doped Ni / SiO 2 Nano composite catalyst, its preparation method comprises the steps:

[0067] 1) Weigh 22.736g Na 2 SiO 3 9H 2 O was put into a beaker, and 75.024g of distilled water was added for ultrasonic dissolution to obtain Na 2 SiO 3 solution; dilute analytically pure concentrated nitric acid and distilled water at a volume ratio of 1:4 and add dropwise to the obtained Na 2 SiO 3 In the solution, magnetic stirring is carried out while adding dropwise, until pH=6, and mixed solution I is obtained;

[0068] 2) Weigh 2.617g Ni(NO 3 ) 2 ·6H 2 O was put into a beaker, and 13.833g of distilled water was added for ultrasonic dissolution to obtain a nickel salt solution; 0.2416g Cu(NO 3 ) 2 ·3H 2 O is put into a beaker, and 10 g of distilled water is added for ultrasonic dissolution to obtain a copper salt solution; then the obtained nickel salt solution and copper salt solution solution are added dropwise to the mixed solution I, and magnetic stirrin...

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Abstract

The invention relates to a method for improving the stability of an Ni-Cu/SiO2 nanocomposite catalyst in methane dry reforming by using mesoporous silica as a carrier and nickel nanocrystal as a mainactive component through copper doping, belonging to the technical field of catalyst preparation. The nanocomposite catalyst is prepared from raw materials like nickel nitrate, sodium silicate and diluted nitric acid by a simple precipitation method through steps of aging, filtering and washing, drying, grinding and reducing; the method provided by the invention has simple preparation process, noneed of high-temperature calcination, cheap and easily available raw materials and low cost; and the catalyst prepared by using the method provided by the invention has the advantages of high catalytic activity, good stability, no significant decrease in activity after reacted under the condition of 700 DEG C for 140 hours, strong capability of resisting sintering and carbon deposition, etc. The catalyst provided by the invention is applied to a methane dry reforming reaction, and provides an effective solution channel for effective utilization of natural gas and emission reduction of CO2.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to a copper-doped Ni / SiO 2 Nanocomposite catalyst and its preparation method. Background technique [0002] As a high-quality and efficient clean energy and chemical raw material, natural gas is widely used in urban gas, industrial fuel, power generation and chemical industries. Due to the increasing shortage of petroleum resources and increasingly stringent environmental protection requirements, the use of methane to synthesize oil, olefins, oxygenated compounds, and hydrogen has become an important way to utilize methane, which has attracted special attention from domestic and foreign governments, enterprises, and academic institutions. Global warming due to the emission of greenhouse gases is of great significance. At present, the catalysts used for the reforming of methane and carbon dioxide to produce synthesis gas are mostly supported metal catalysts, which are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/10B01J37/03C01B3/40
CPCB01J23/755B01J35/006B01J35/10B01J35/1061B01J37/031C01B3/40C01B2203/1058Y02P20/52
Inventor 李远志胡倩倩张倩江仲开
Owner WUHAN UNIV OF TECH
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