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A kind of carbon dioxide methanation catalyst and preparation method thereof

A methanation catalyst, carbon dioxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc., can solve the problem of uneven surface distribution of active components, poor stability, problems such as poor stability, to achieve the effects of low cost, high conversion rate and high dispersibility

Active Publication Date: 2020-02-07
王婵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN106311242A discloses a carbon dioxide methanation catalyst and a preparation method thereof, the catalyst is composed of a composite carrier and an active component, composite carrier: active component=84-90wt%: 10-16wt%; wherein, the composite carrier is composed of γ-Al 2 o 3 Composed with water-soluble metal oxides, γ-Al 2 o 3 The mass ratio to the water-soluble metal oxide is 77-86: 2-10; the active component is Ni, and exists in the catalyst in the form of NiO, and the carbon dioxide methanation catalyst prepared by the invention is used under normal pressure conditions, However, its activity is not high and its stability is poor
The catalyst prepared by the present invention can effectively catalyze the hydrogenation of carbon dioxide to produce methane under the reaction conditions of normal pressure, space velocity of 2000-20000h-1, H2 / CO2=4:1 and temperature of 300-500°C, but its carrier is inert Carrier, the loaded active components are unevenly distributed on its surface, resulting in insufficient activity and poor stability

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  • A kind of carbon dioxide methanation catalyst and preparation method thereof

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Embodiment 1

[0031] A kind of carbon dioxide methanation catalyst and preparation method thereof

[0032] The catalyst carrier is made up of the following raw materials in parts by weight: 75 parts of vermiculite, Al 2 o 3 10 parts, SiO 2 7 parts, charcoal powder 7 parts, cement powder 10 parts.

[0033] The preparation steps are as follows:

[0034] Step S10, pretreatment of vermiculite: first put vermiculite into 6% nitric acid solution, treat at 45°C for 2 hours, put the acidified vermiculite into deionized water for cleaning; then put vermiculite into In the muffle furnace, high-temperature calcination expansion is carried out, the temperature in the muffle furnace is controlled at 680°C, and the calcination time is 1.5 hours;

[0035] After high-temperature calcination, vermiculite can not only remove volatile impurities, but also expand its volume by 6 to 20 times. Its rich specific surface area is conducive to the loading of active components on its inner and outer surfaces. Pic...

Embodiment 2

[0042] A kind of carbon dioxide methanation catalyst and preparation method thereof

[0043] The catalyst carrier is made up of the following raw materials in parts by weight: 80 parts of vermiculite, Al 2 o 3 8 parts, SiO 2 5 parts, charcoal powder 10 parts, cement powder 10 parts.

[0044] The preparation steps are as follows:

[0045] Step S10, pretreatment of vermiculite: first put vermiculite into 3% nitric acid solution, treat at 45°C for 2 hours, put the acidified vermiculite into deionized water for cleaning; then put vermiculite into In the muffle furnace, high-temperature calcination expansion is carried out, the temperature in the muffle furnace is controlled at 600 ° C, and the calcination time is 2 hours;

[0046] After high-temperature calcination, vermiculite can not only remove volatile impurities, but also expand its volume by 6 to 20 times. Its rich specific surface area is conducive to the loading of active components on its inner and outer surfaces. Pic...

Embodiment 3

[0053] A kind of carbon dioxide methanation catalyst and preparation method thereof

[0054] The catalyst carrier is made up of the following raw materials in parts by weight: 70 parts of vermiculite, Al 2 o 3 10 parts, SiO 2 10 parts, charcoal powder 5 parts, cement powder 15 parts.

[0055] The preparation steps are as follows:

[0056] Step S10, pretreatment of vermiculite: first put vermiculite into 10% nitric acid solution, treat at 45°C for 2 hours, put the acidified vermiculite into deionized water for cleaning; then put vermiculite into In the muffle furnace, high-temperature calcination expansion is carried out, the temperature in the muffle furnace is controlled at 650 ° C, and the calcination time is 1 hour;

[0057] After high-temperature calcination, vermiculite can not only remove volatile impurities, but also expand its volume by 6 to 20 times. Its rich specific surface area is conducive to the loading of active components on its inner and outer surfaces. Pi...

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Abstract

The invention discloses a carbon dioxide methanation catalyst and a preparation method thereof, which includes a carrier and active components. The carrier is composed of the following raw materials in parts by weight: 70 to 80 parts of vermiculite, Al 2 O 3 8 to 15 parts, SiO 2 5 to 10 parts, carbon powder 5 to 10 parts, cement powder 5 to 15 parts, the active component is one or a combination of at least two of Ni, Fe, Co, through carrier pretreatment, molding, crushing, loading, etc. It is prepared through the following steps, and an excess impregnation method is used to prepare a supported carbon dioxide methanation catalyst. The carbon dioxide methanation catalyst of the present invention has the characteristics of low loading capacity, cheap and easily available carrier, simple preparation method, and high catalytic activity, and can be widely used in carbon dioxide methanation. on the reaction device.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide methanation, and in particular relates to a carbon dioxide methanation catalyst and a preparation method thereof. Background technique [0002] With the rapid development of the global economy and the dwindling of natural resources, the carbon dioxide emitted by humans to nature has already had a serious impact on the ecological environment. Therefore, it is of great significance to recycle and convert carbon dioxide into high value-added fuels. Carbon dioxide methanation, using carbon dioxide and hydrogen as raw materials to synthesize high-calorific value clean fuel methane (combustion heat value 891kJ / mol), on the one hand reduces natural carbon dioxide, realizes effective use of resources, and on the other hand synthesizes clean energy methane , has the characteristics of simple process, low investment and high return. [0003] Chinese patent CN106311242A discloses a carbon dioxide met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J23/755B01J23/75B01J21/18B01J32/00C10G2/00C07C1/12C07C9/04
CPCC10G2/50C07C1/12B01J21/18B01J23/745B01J23/75B01J23/755B01J35/00B01J35/30C07C9/04
Inventor 章德恩
Owner 王婵