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Method for preparing Ni-based catalyst by ultrasonic-assisted impregnation method

An ultrasonic and catalyst technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of increased preparation cost, inability to guarantee the amount of impregnation, and many steps, so as to reduce catalyst costs and improve The effect of CO2 methanation efficiency and improvement of utilization efficiency

Inactive Publication Date: 2019-05-17
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent has many steps, which increases the preparation cost
Chinese patent CN201611117360.5 proposes a method for preparing a catalyst by ultrasonic impregnation. This patent suction-filters the suspension and cannot guarantee the amount of impregnation

Method used

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  • Method for preparing Ni-based catalyst by ultrasonic-assisted impregnation method
  • Method for preparing Ni-based catalyst by ultrasonic-assisted impregnation method
  • Method for preparing Ni-based catalyst by ultrasonic-assisted impregnation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, 2.918g Ni(NO 3 ) 2 ·6H 2 O 1 was fully dissolved in 8.0ml deionized water 2 to obtain impregnation solution 5; then 4.000g γ-Al 2 o 3 Carrier 4 was added to the above impregnation solution 5, fully shaken for 10 minutes, then placed in ultrasonic disperser 6 for 100W ultrasonic dispersion for 15 minutes, then left at room temperature for 36 hours, dried in 110°C drying oven 7 for 12 hours, and placed in a muffle furnace 9 was roasted at 450°C at a rate of 5°C / min for 3 hours, and the obtained sample 8 was passed into H2 in a high-temperature tube furnace 10 at 550°C 2 Mixed gas of 11 and Ar 12, H 2 The volume ratio of Ar and Ar is 1:9, and the reduction is 3h to obtain 5g of Ni / γ-Al with a loading capacity of 15%. 2 o 3 catalyst.

Embodiment 2

[0024] Such as figure 1 As shown, 2.918g Ni(NO 3 ) 2 ·6H 2 O 1 was fully dissolved in 1.2ml deionized water 2 to obtain impregnation solution 5; then 0.300g ZrO 2 Carrier 4 was added to the above impregnation solution 5, fully shaken for 15 minutes, then placed in ultrasonic disperser 6 for 80W ultrasonic dispersion for 10 minutes, then left at room temperature for 48 hours, dried in 180°C drying oven 7 for 8 hours, and then placed in a muffle furnace 9 The heating rate of 8°C / min was increased to 450°C for 4 hours, and the obtained sample 8 was passed into H in a high-temperature tube furnace 10 at 600°C. 2 Mixed gas of 11 and Ar 12, H 2 The volume ratio of Ar and Ar is 1:9, after reduction for 3h, 5g of Ni / ZrO with a loading capacity of 10% is obtained 2 catalyst.

Embodiment 3

[0026] Such as figure 1 As shown, 3.891g Ni(NO 3 ) 2 ·6H 2 O 1 was fully dissolved in 8.0ml deionized water 2 to obtain impregnation solution 5; then 4.000g γ-Al 2 o 3 Carrier 4 was added to the above impregnation solution 5, fully shaken for 20 minutes, then placed in ultrasonic disperser 6 for 50W ultrasonic dispersion for 20 minutes, then left at room temperature for 24 hours, dried in 110°C drying oven 7 for 12 hours, and then placed in a muffle furnace 9 was roasted at 500°C at a rate of 5°C / min for 3 hours, and the obtained sample 8 was passed into H2 in a high-temperature tube furnace 10 at 550°C 2 Mixed gas of 11 and Ar 12, H 2 The volume ratio of Ar and Ar is 1:9, and the reduction takes 4 hours to obtain 5 g of Ni / γ-Al with a loading capacity of 20%. 2 o 3 catalyst.

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Abstract

The invention provides a method for preparing a Ni-based catalyst by an ultrasonic-assisted impregnation method. The method provided by the invention is characterized by comprising the following steps: dissolving Ni(NO3)26H2O in deionized water to obtain impregnation liquid; adding a carrier into the impregnation liquid, shaking for 5 to 30 min; then placing in an ultrasonic dispersion instrumentto carry out ultrasonic dispersion, wherein ultrasonic power is 50 to 150 W; then standing for 24 to 48 hours; drying for 8 to 24 h in a drying box with a temperature of 110 to 180 DEG C; placing an obtained product in a muffle furnace to roast for 3 to 5 h; then placing in a high-temperature tube furnace with a temperature of 500 to 600 DEG C; filling in mixed gas of H2 and Ar; and reducing for 3to 5 h to obtain the Ni-based catalyst. Compared with a conventional impregnation technology, according to the invention, the catalyst obtained by using ultrasonic assistance can obviously improve the dispersity of Ni and reduce a grain size of the Ni.

Description

technical field [0001] The invention relates to a method for preparing a supported catalyst, in particular to a method for preparing a Ni-based catalyst by an ultrasonic-assisted impregnation method, and belongs to the field of materials and chemical engineering. Background technique [0002] in CO 2 In catalytic reduction, supported catalysts are the most widely studied catalysts. CO 2 Catalysts with better catalytic performance in the hydrogenation of methane include Rh, Ru, Pd, Pt, Co, Mg, Ni and other noble or non-noble metals, and the commonly used carriers are ZrO 2 , CeO 2 , La 2 o 3 , γ-Al 2 o 3 , Molecular sieve, etc. From the comprehensive consideration of reaction performance and economic efficiency, Ni is a better catalyst, but it is difficult to uniformly load Ni on the carrier due to the preparation method and other reasons. The current preparation methods mainly include impregnation method, deposition precipitation method, sol-gel method and ion excha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/02B01J37/34
Inventor 郭得通丁红蕾潘衍行周柒潘卫国吴韶飞贾鹏谣
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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