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Nickel-based catalyst, preparation method of nickel-based catalyst, reduction state nickel-based catalyst and method for preparing synthesis gas through methane auto-thermal reforming

A nickel-based catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. cumbersome and other problems, to achieve good activity and stability, good catalytic performance, and good product repeatability

Inactive Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned various methods have the following problems: (a) the catalyst components are more complex, the preparation process is more cumbersome, and it is not easy to repeat; (b) the addition of noble metal components will directly lead to an increase in the catalyst preparation cost and prolong the preparation cycle

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  • Nickel-based catalyst, preparation method of nickel-based catalyst, reduction state nickel-based catalyst and method for preparing synthesis gas through methane auto-thermal reforming
  • Nickel-based catalyst, preparation method of nickel-based catalyst, reduction state nickel-based catalyst and method for preparing synthesis gas through methane auto-thermal reforming

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Embodiment approach

[0024] In a preferred embodiment of the present invention, in step (1), contact the precipitating agent and hydrogen peroxide with an aqueous solution containing cerium salt and zirconium salt, and adjust the pH of the obtained product to >7 before aging; preferably, pH=9-11.

[0025] According to the present invention, cheap and easy-to-obtain cerium salt that can be configured into an aqueous solution can be used in step (1). , preferably, the cerium salt is an inorganic cerium salt, preferably the cerium salt is at least one of cerium nitrate, cerium trichloride and cerium sulfate.

[0026] According to the present invention, the amount of the cerium salt contained in the aqueous solution only needs to meet the amount needed to prepare the nickel-based catalyst, preferably, the Ce in the aqueous solution 3+ The concentration is 0.1-0.3mol / L.

[0027] According to the present invention, cheap and easy-to-obtain zirconium salts that can be configured into aqueous solutions c...

Embodiment 1

[0060] This example is used to illustrate the method for preparing nickel-based catalyst and reduced nickel-based catalyst provided by the present invention.

[0061] (1) 0.2mol of Ce(NO 3 ) 3 ·6H 2 O and 0.2mol of ZrO(NO 3 ) 2 2H 2 O was prepared into a 1000ml mixed aqueous solution and transferred to a three-neck flask.

[0062] Put the three-neck bottle into an ultrasonic cleaner, adjust the ultrasonic power to 200W, and the ultrasonic temperature to 40°C. Under the conditions of turning on the ultrasonic wave and continuously stirring at 1000rpm, add 50ml of 3.0mol / L hydrogen peroxide dropwise to the three-necked bottle at a speed of 0.5ml / min, and at the same time add dropwise 5mol / L ammonia water to the there-necked bottle to maintain the pH of the system= 10. After the entire dropwise addition process was completed, continue to sonicate and stir for 2 hours; then stand at room temperature for aging for 10 hours, and filter with suction to obtain a solid product. ...

Embodiment 2

[0070] This example is used to illustrate the method for preparing nickel-based catalyst and reduced nickel-based catalyst provided by the present invention.

[0071] (1) 0.3mol of CeCl 3 and 0.15mol of ZrOCl 2 ·8H 2 O was prepared into a 1000ml mixed aqueous solution and transferred to a three-neck flask.

[0072] Put the three-neck bottle into an ultrasonic cleaner, adjust the ultrasonic power to 150W, and the ultrasonic temperature to 60°C. Under the conditions of turning on the ultrasonic wave and continuously stirring at 500rpm, add 30ml of 5.0mol / L hydrogen peroxide dropwise to the three-necked flask at a speed of 0.5ml / min, and at the same time, dropwise add 2mol / L ammonia water to the there-necked flask to maintain the pH of the system= 9. After the whole dropwise addition process was completed, continue to sonicate and stir for 2 hours, then stand at room temperature for aging for 10 hours, and filter with suction to obtain a solid product.

[0073] The solid pro...

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Abstract

The invention discloses a nickel-based catalyst, a preparation method of the nickel-based catalyst, a reduction state nickel-based catalyst and a method for preparing a synthesis gas through methane auto-thermal reforming. The preparation method of the nickel-based catalyst comprises the following steps: (1) under ultrasonic and stirring conditions, enabling a precipitant, hydrogen peroxide, a cerium salt and a zirconium salt to be in contact in a water phase, performing aging, separating an aged product, and performing first drying and first roasting, so as to obtain a cerium-zirconium solid solution; and (2) introducing a nickel precursor into the cerium-zirconium solid solution obtained in the step (1), and performing second drying and second roasting, thereby obtaining the nickel-based catalyst. By adopting the preparation method disclosed by the invention, the nickel-based catalyst which is large in specific surface area and uniform in nickel material dispersion can be prepared, and the reduction state nickel-based catalyst is good in catalytic performance when being used in a reaction for preparing the synthesis gas through methanol auto-thermal reforming.

Description

technical field [0001] The invention relates to a preparation method of a nickel-based catalyst, the nickel-based catalyst prepared by the method, a reduced nickel-based catalyst and a method for preparing synthesis gas by using the reduced nickel-based catalyst to carry out methane autothermal reforming reaction. Background technique [0002] The reforming of methane to synthesis gas is the main way of industrial application of natural gas. Among them, the methane autothermal reforming reaction has attracted much attention because it couples the endothermic steam reforming reaction and the exothermic partial oxidation reaction. By adjusting the ratio of raw materials, the methane autothermal reforming reaction can obtain syngas with different product ratios, which is suitable for the production of various downstream products, and at the same time realizes partial self-heating of the system. Therefore, from the perspective of saving energy and adjusting the ratio of product...

Claims

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Application Information

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IPC IPC(8): B01J23/83C01B3/40
CPCY02P20/52
Inventor 刘红梅张明森冯静徐向亚姜健准
Owner CHINA PETROLEUM & CHEM CORP
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