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Coal-to-natural gas catalyst and manufacturing method thereof

A technology for producing natural gas from coal and a manufacturing method, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Problems such as poor process and thermal stability

Inactive Publication Date: 2012-02-01
熊世平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no large-scale production and operation of domestic coal-to-natural gas, and its methanation catalyst is in the research and development stage. The common problem is that the heat-resistant temperature of the catalyst is low, and the thermal stability is poor, so it is difficult to meet the requirements of the production process.

Method used

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  • Coal-to-natural gas catalyst and manufacturing method thereof
  • Coal-to-natural gas catalyst and manufacturing method thereof
  • Coal-to-natural gas catalyst and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 60g Al 2 o 3 , 10g CaCO 3 , 6g TiO 2 , 2g La 2 O3, 1g of graphite and 15ml of water are fully mixed, extruded into strips, dried at 110-150°C for 2 hours, and then calcined at 1000°C for 4 hours to make the catalyst carrier.

[0029] Impregnation of the obtained catalyst support: the catalyst support was immersed in the prepared nickel nitrate aqueous solution with a specific gravity of 1.55, the immersion temperature was 85° C., and the immersion time was 30 minutes. The impregnated catalyst was taken out and dried at 150° C. for 2 hours, and then decomposed at 500° C. for 2 hours.

[0030] The catalyst impregnated and decomposed once is subjected to repeated impregnation and decomposition for the second time according to the conditions required in the above impregnation and decomposition process, so as to obtain the coal-to-natural gas catalyst. The Ni content is 15.3%.

Embodiment 2

[0032] 63g Al 2 o 3 , 10.2g CaCO 3 , 6.6g TiO 2 , 2.1g La 2 o 3 , 1.3g of graphite and 15ml of water are fully mixed, extruded into strips, dried at 110-150°C for 2 hours, and then calcined at 800-1200°C for 4 hours to make the catalyst carrier.

[0033] Impregnation of the obtained catalyst support: the catalyst support was immersed in the prepared nickel nitrate aqueous solution with a specific gravity of 1.45, the immersion temperature was 90° C., and the immersion time was 1 hour. The impregnated catalyst was taken out and dried at 170°C for 2 hours, and then decomposed at 550°C for 2 hours.

[0034] The catalyst impregnated and decomposed once is subjected to repeated impregnation and decomposition for the second time according to the conditions required in the above impregnation and decomposition process, so as to obtain the coal-to-natural gas catalyst. The Ni content is 9.2%.

Embodiment 3

[0036] 58g Al 2 o 3 , 9.6g CaCO 3 , 5.88g TiO 2 , 1.8g La 2 o 3 1. 1g of graphite and 15ml of water are fully mixed, extruded into strips, dried at 110-150°C for 3 hours, and then calcined at 800-1200°C for 4 hours to make a catalyst carrier.

[0037] Impregnation of the obtained catalyst carrier: the catalyst carrier was immersed in the prepared nickel nitrate aqueous solution with a specific gravity of 1.35, the immersion temperature was 85° C., and the immersion time was 1 hour. The impregnated catalyst was taken out and dried at 180°C for 2 hours, and then decomposed at 550°C for 3 hours to obtain a coal-to-natural gas catalyst. Ni content 20%.

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Abstract

The invention discloses a coal-based natural gas catalyst and a manufacturing method thereof. The coal-based natural gas catalyst includes the following components in weight percent: nickel oxide 8-38, titanium dioxide 1-6, calcium oxide 5-20, dilanthanum trioxide 0.5- 2. The balance is catalyst carrier aluminum oxide. The manufacturing method of the coal-to-natural gas catalyst includes preparing carrier mixture, forming and calcining the carrier mixture, impregnating and decomposing nickel nitrate. The invention aims at the characteristics of coal-to-natural gas methanation reaction process, has good catalyst activity, high heat-resistant temperature and good thermal stability, and its preparation method is simple and easy to operate.

Description

technical field [0001] The invention belongs to a new type of catalyst, in particular to a methanation catalyst in the process of synthesizing natural gas with coal as the basic raw material and its preparation method. Background technique [0002] Natural gas has the characteristics of high efficiency, cleanliness, and convenient transmission. It is an ideal clean energy. However, China is a country rich in coal, low in oil, and poor in gas. At present, natural gas accounts for only 3% of China's primary energy consumption. But the market demand for natural gas is growing rapidly. China's energy is characterized by coal. The key to solving energy problems is how to use coal cleanly and efficiently. Coal-to-natural gas has the advantages of high energy conversion efficiency, low water consumption, low cost, and low waste disposal. Accelerating the clean development and utilization of coal and developing the coal-based gaseous energy industry have become an important strateg...

Claims

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Application Information

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IPC IPC(8): B01J23/835C10L3/08
Inventor 熊世平
Owner 熊世平
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