Nickel-based pure silicon type molecular sieve catalyst as well as preparation method and application thereof

A molecular sieve and catalyst technology, which is applied in the field of synthesis gas methanation catalyst preparation, can solve the problems of complex preparation process, difficult control of experimental conditions, and difficulty in industrial scale-up

Inactive Publication Date: 2021-09-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the prepared catalyst has good catalytic performance, the preparation process is complic...

Method used

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  • Nickel-based pure silicon type molecular sieve catalyst as well as preparation method and application thereof
  • Nickel-based pure silicon type molecular sieve catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 3g tetraethyl orthosilicate (TEOS), 6g ethanol, 1.5g triblock copolymer P123 and 0.6g dilute hydrochloric acid (0.03mol / L) into the flask, condense and reflux for 1 hour at a temperature of 85°C, and reflux The obtained solution was placed in an oven at 40°C for 24 hours; 0.7g of PVP was weighed and added to 7gDMF, stirred for 6 hours, 0.46g of nickel nitrate hexahydrate was added to 1.5g of ethanol, stirred for 3 hours, and the above three The solution was mixed and stirred for 2 hours to prepare a spinning precursor solution. The prepared spinning precursor solution was used for electrospinning, the spinning parameters were voltage 18kV, the distance from the needle mouth to the receiving plate was 20cm, the liquid pushing speed was 0.8ml / h, the humidity was set at 20%, and the temperature was 30°C for electrospinning Silk. Dry the nanofiber membrane obtained after spinning at a temperature of 110°C for 10 hours, then place the dried nanofibers in a muffle furnac...

Embodiment 2

[0042] Add 3g tetraethyl orthosilicate (TEOS), 6g ethanol, 1.5g triblock copolymer P123 and 0.6g dilute hydrochloric acid (0.03mol / L) into the flask, condense and reflux for 1 hour at a temperature of 85°C, and reflux The obtained solution was placed in an oven at 40°C for 36 hours; 1.0g of PVP was weighed and added to 6gDMF, stirred for 6 hours, 0.46g of nickel nitrate hexahydrate was added to 1.5g of ethanol, stirred for 3 hours, and the above three The solution was mixed and stirred for 2 hours to prepare a spinning precursor solution. The prepared spinning precursor solution was used for electrospinning, the spinning parameters were voltage 18kV, the distance from the needle mouth to the receiving plate was 20cm, the liquid pushing speed was 0.8ml / h, the humidity was set at 20%, and the temperature was 30°C for electrospinning Silk. Dry the nanofiber membrane obtained after spinning at a temperature of 110°C for 10 hours, then place the dried nanofibers in a muffle furnac...

Embodiment 3

[0044] Add 6g of tetraethyl orthosilicate (TEOS), 10g of ethanol, 1.8g of triblock copolymer P123 and 1.2g of dilute hydrochloric acid (0.06mol / L) into the flask, condense and reflux for 1 hour at a temperature of 85°C, and reflux The obtained solution was placed in an oven at 40°C for 36 hours; 1.0g of PVP was weighed and added to 7gDMF, stirred for 6 hours, 0.46g of nickel nitrate hexahydrate was added to 1.5g of ethanol, stirred for 3 hours, and the above three The solution was mixed and stirred for 2 hours to prepare a spinning precursor solution. The prepared spinning precursor solution was used for electrospinning, the spinning parameters were voltage 18kV, the distance from the needle mouth to the receiving plate was 20cm, the liquid pushing speed was 0.8ml / h, the humidity was set at 20%, and the temperature was 30°C for electrospinning Silk. Dry the nanofiber membrane obtained after spinning at a temperature of 110°C for 10 hours, then place the dried nanofibers in a ...

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Abstract

The invention discloses a nickel-based pure silicon type molecular sieve catalyst. The specific surface area of the molecular sieve catalyst is 200-500m < 2 >/g, the size of the molecular sieve catalyst is 2-5nm, and the metal loading capacity of the molecular sieve catalyst is 5-10wt%. The preparation method of the nickel-based pure silicon type molecular sieve catalyst comprises the following steps of: mixing tetraethoxysilane, ethanol, diluted hydrochloric acid and a template agent; carrying out reflux condensation; making an obtained mixture stand still; adding a polymer spinning auxiliary solution and a metal salt solution, performing uniform stirring to obtain a spinning precursor solution; and carrying out electrostatic spinning, drying and roasting to finally obtain the pure silicon type molecular sieve catalyst. According to the nickel-based pure silicon type molecular sieve catalyst prepared by the electrostatic spinning method, the specific surface area of the catalyst is large; the active metal is uniformly dispersed on the carrier, the utilization rate of the active metal is high, the dispersity of the metal is high, the particle size is small, and the active metal is not easy to sinter in a strong exothermic reaction of synthesis gas methanation.

Description

technical field [0001] The invention belongs to the technical field of preparation of synthesis gas methanation catalysts, and in particular relates to a nickel-based pure silicon molecular sieve catalyst and its preparation method and application. Background technique [0002] Coal is the main energy source for my country's economic development, but the direct combustion and utilization of coal will cause serious environmental pollution, making environmental protection face enormous pressure. As people pay more and more attention to the ecological environment, natural gas, as a clean and efficient energy source, has become more and more widely used. Therefore, the development of coal-based natural gas industry is an important way to alleviate environmental problems. The key process of the coal-to-natural gas process is the methanation of syngas, and the development of efficient catalysts for the methanation of syngas is very important. [0003] Studies have shown that pure...

Claims

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Application Information

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IPC IPC(8): B01J29/03B01J35/00B01J35/02B01J35/06B01J35/10C07C1/04C07C9/04
CPCB01J35/065B01J35/1019B01J35/006B01J35/0093B01J35/0066B01J35/023B01J35/0013B01J35/1061B01J29/0333C07C1/0435C07C1/0445B01J2229/186C07C9/04
Inventor 辛忠何璐铭孟鑫
Owner EAST CHINA UNIV OF SCI & TECH
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