Nickel-based catalyst for dry reforming of methane and carbon dioxide and preparation method and application thereof

A technology of nickel-based catalyst and carbon dioxide, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Problems such as high energy consumption, to avoid particle accumulation, expand industrial applications, and eliminate carbon deposition and deactivation

Inactive Publication Date: 2019-05-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above shortcomings in the prior art, the object of the present invention is to provide a nickel-based catalyst for methane carbon dioxide dry reforming and its preparation method and application, so as to overcome the easy sintering and carbon deposition of the methane dry reforming catalyst in the prior art The disadvantages of methane carbon dioxide dry reforming process are high requirements on equipment materials, high energy consumption, and the difficulty of resource utilization of waste gases such as coke oven gas and flue gas.

Method used

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  • Nickel-based catalyst for dry reforming of methane and carbon dioxide and preparation method and application thereof
  • Nickel-based catalyst for dry reforming of methane and carbon dioxide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 A methane carbon dioxide dry reforming catalyst

[0032] Prepare as follows:

[0033] (1) The ϒ-Al 2 o 3 Put it into a muffle furnace, program the temperature from room temperature to 800 °C at a rate of 4 °C / min, and then calcine at a constant temperature for 4 hours to obtain pretreated ϒ-Al 2 o 3 (The water absorption rate was determined to be 1.4 g / g);

[0034] (2) Measure 3.07 g of nickel nitrate hexahydrate and 0.75 g of yttrium nitrate hexahydrate into 7 mL of deionized water weighed in advance, stir and dissolve until transparent, and then sonicate for 30 min to obtain solution A;

[0035] (3) Weigh 5 g of the pretreated ϒ-Al obtained in step (1) 2 o 3 , add solution A to the pretreated ϒ-Al at a rate of 0.5-1.0 mL / min 2 o3 In, stir while adding solution A, make solution A and pretreated ϒ-Al 2 o 3 The mixed sample was stirred evenly until it became a paste, and then ultrasonicated for 30 min. The sonicated paste was impregnated in the dark f...

Embodiment 2

[0038] Example 2 A methane carbon dioxide dry reforming catalyst

[0039] Prepare as follows:

[0040] (1) The ϒ-Al 2 o 3 Put it into a muffle furnace, program the temperature from room temperature to 800 °C at a rate of 4 °C / min, and then calcine at a constant temperature for 4 hours to obtain pretreated ϒ-Al 2 o 3 (The water absorption rate was determined to be 1.4 g / g);

[0041] (2) Measure 3.15 g of nickel nitrate hexahydrate and 1.28 g of yttrium nitrate hexahydrate into 7 mL of deionized water weighed in advance, stir and dissolve until transparent, and then sonicate for 30 min to obtain solution A;

[0042] (3) Weigh 5 g of the pretreated ϒ-Al obtained in step (1) 2 o 3 , add solution A to the pretreated ϒ-Al at a rate of 0.5-1.0 mL / min 2 o 3 In, stir while adding solution A, make solution A and pretreated ϒ-Al 2 o 3 The mixed sample was stirred evenly until it became a paste, and then ultrasonicated for 30 min. The sonicated paste was impregnated in the dark...

Embodiment 3

[0045] Example 3 A methane carbon dioxide dry reforming catalyst

[0046] Prepare as follows:

[0047] (1) The ϒ-Al 2 o 3 Put it into a muffle furnace, program the temperature from room temperature to 800 °C at a rate of 4 °C / min, and then calcine at a constant temperature for 4 hours to obtain pretreated ϒ-Al 2 o 3 (The water absorption rate was determined to be 1.4 g / g);

[0048] (2) Measure 3.34 g of nickel nitrate hexahydrate and 2.72 g of yttrium nitrate hexahydrate into 7 mL of deionized water weighed in advance, stir and dissolve until transparent, and then sonicate for 30 min to obtain solution A;

[0049] (3) Weigh 5 g of the pretreated ϒ-Al obtained in step (1) 2 o 3 , add solution A to the pretreated ϒ-Al at a rate of 0.5-1.0 mL / min 2 o 3 In, stir while adding solution A, make solution A and pretreated ϒ-Al 2 o 3 The mixed sample was stirred evenly until it became a paste, and then ultrasonicated for 30 min. The sonicated paste was impregnated in the dark...

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Abstract

The invention discloses a nickel-based catalyst for dry reforming of methane and carbon dioxide and a preparation method and application thereof. The catalyst uses gamma-Al2O3 as a catalyst carrier, uses elementary nickel as an active component and uses yttrium oxide as a cooperative component. The preparation method includes the steps that the gamma-Al2O3 is calcined for pretreatment, the pretreated gamma-Al2O3 is evenly mixed with an aqueous solution of a nickel salt and a yttrium salt through an equivalent-volume impregnation method, and after impregnation is completed with light shielded at the room temperature, the catalyst is obtained through drying and calcining. The rare earth metal yttrium is added into the catalyst as the cooperative component, the yttrium oxide and the metal nickel form a 'cooperation-activity' site on the gamma-Al2O3, and thus catalytic activity and stability are improved; moreover, addition of the yttrium oxide facilitates dispersion of metal nickel particles on the gamma-Al2O3. The catalyst has good carbon-deposition resistance performance when applied to dry reforming reaction of methane and carbon dioxide.

Description

technical field [0001] The invention relates to a nickel-based catalyst for methane carbon dioxide dry reforming, a preparation method and application thereof. Background technique [0002] The three major fossil energy sources of coal, oil and natural gas are the main fuels used by humans at present, and they are also important chemical fuels. With the continuous development of science and technology, human demand for fossil energy continues to increase. The utilization of coal and petroleum fossil energy is mainly through combustion, and the NO produced by it x , SO x and CO 2 Such gases will cause acid rain, greenhouse effect and other impacts on the environment. The substances produced by the combustion of natural gas are much less polluting to the environment than coal and petroleum, and are a very clean energy source, and its main component is methane. my country has abundant natural gas reserves. As of the end of 2016, my country's cumulative proven natural gas r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J37/02B01J37/08B01J37/18C01B3/40
CPCY02P20/52
Inventor 姜洪涛蔡杨其陈银山计建炳
Owner ZHEJIANG UNIV OF TECH
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