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Copper-based catalyst for carbon dioxide methanation and preparation method thereof

A methanation catalyst, carbon dioxide technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of low activity and no methanation of copper-based catalysts with carbon dioxide And other issues

Inactive Publication Date: 2015-10-14
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is generally believed that ruthenium and nickel exhibit high activity on various supports, while cobalt and iron have relatively low activity.
[0005] The current carbon dioxide methanation catalysts are mainly ruthenium-based and nickel-based, and have not been used for carbon dioxide methanation copper-based catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Weigh 5.20g of zinc nitrate and 13.12g of aluminum nitrate, dissolve them in a 50mL desalinated beaker, stir to dissolve them completely, add desalinated water and set the volume to 85mL to prepare a one-step salt solution. Weigh 7.71g of sodium carbonate, dissolve it in a 50mL desalinated beaker, stir to dissolve it completely, add desalinated water and set the volume to 85mL to prepare a one-step alkali solution. Weigh 98.61g of copper nitrate, 64.18g of zinc nitrate, 30.62g of aluminum nitrate, 118.8g of cobalt nitrate, and 36.5g of iron nitrate, dissolve them in a 500mL desalinated beaker, stir to dissolve them completely, add desalinated water and dilute to 1000mL to prepare a two-step salt solution. Weigh 142.19g of sodium carbonate, dissolve it in a 500mL desalinated beaker, stir to dissolve it completely, add desalinated water and set the volume to 1000mL to prepare a two-step alkali solution.

[0041] Preheat the one-step salt and one-step alkali to a reaction ...

Embodiment 2

[0048] At a reaction temperature of 400°C and a system pressure of 6.0MPa, the raw material gas H 2 / CO 2 =4.1, the volumetric space velocity of raw gas is 8000h -1 Under these conditions, the activity of the prepared catalyst for carbon dioxide hydromethanation was evaluated. Analyzed by gas chromatography, CO 2 The conversion rate is 75.5%, CH 4 The selectivity is 99.7%.

Embodiment 3

[0050] Take by weighing zinc nitrate 11.59g, aluminum nitrate 29.23g as one-step salt solution, potassium carbonate 23.69g as one-step alkali solution; copper nitrate 189.22g, zinc nitrate 54.64g, aluminum nitrate 12.53g, magnesium nitrate 9.11g, cobalt nitrate 128.45g, 21.36g of iron nitrate and 239.13g of potassium carbonate are used as two-step salt and alkali solution. See Example 1 for the preparation method. The pH value of the reaction slurry was 7.2.

[0051] After calcination, 121.6 g of catalyst powder was obtained. After cooling, an appropriate amount of stone mill and water were added for thorough mixing, and then tablet molding was performed to obtain catalyst B with an atomic ratio of 8:4:2:1:0.1.

[0052] When the reaction temperature is 360°C, the system pressure is 5.0MPa, the raw material gas H 2 / CO 2 =3.1, the raw material gas volume space velocity is 5000h -1 Under these conditions, the activity of the prepared catalyst for carbon dioxide hydromethanat...

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Abstract

The invention provides a copper-based carbon dioxide methanation catalyst. The main active component of the catalyst is metal oxide, and the metal includes copper, cobalt, aluminum, zinc, and one or more of magnesium, iron and manganese. The invention also provides the preparation method and application of the copper-based carbon dioxide methanation catalyst. The copper-based carbon dioxide methanation catalyst provided by the invention shows excellent activity and methane selectivity in the methanation reaction of carbon dioxide. The catalyst is suitable for the methanation reaction of synthetic gas methanation to natural gas product gas (rich in CO2 and H2, almost free of CO), and can also be used in the field of CO2 emission reduction.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a copper-based carbon dioxide methanation catalyst in the chemical industry, and belongs to the technical field of catalyst preparation. Background technique [0002] The global climate problem caused by carbon dioxide as the main component of greenhouse gas has seriously affected the survival of human beings. The requirement for carbon dioxide emission reduction and the need for sustainable energy development are, in the final analysis, how to realize the new carbon cycle. Therefore, the conversion and utilization of carbon dioxide as a carbon resource has become the goal of scientific and technological workers for many years. Methane is the main component of natural gas, which has been widely used as a clean energy source (such as combustion for power generation, heating, household use, and as vehicle fuel, etc.). At present, the most common use of na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80B01J23/889B01J37/03C07C9/04C07C1/12
Inventor 邹鑫张晓阳胡志彪胡高荣徐晓峰李倩黄宏
Owner HAO HUA CHENGDU TECH
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