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Catalyst used in complete methanation of synthesis gas at high temperature and preparation method thereof

A technology for complete methanation and catalyst, which is applied in the field of high temperature synthesis gas complete methanation catalyst and its preparation, can solve problems such as huge patent royalties, and achieve the effects of high material handling capacity, strong interaction and uniform distribution

Active Publication Date: 2013-10-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, coal-to-natural gas projects started in China mainly adopt foreign complete methanation technology, for which huge patent royalties need to be paid

Method used

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  • Catalyst used in complete methanation of synthesis gas at high temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing a high-temperature synthesis gas complete methanation catalyst, comprising the following steps:

[0033] (1) Composition and mixing of catalyst components

[0034] 8.918g nickel nitrate Ni(NO 3 ) 2 . 6H 2 O, 22.066g aluminum nitrate Al(NO 3 ) 3 . 9H 2 O, 2.962g lanthanum nitrate La(NO 3 ) 3 . 6H 2 O and 0.4g of manganese nitrate Mn(NO 3 ) 2 The solution was dissolved in 50ml of deionized water, and stirred magnetically for 1 hour at 60°C to fully dissolve and mix the components of the catalyst;

[0035] (2) dry

[0036] drying the dissolved mixture in step (1) at a temperature of 110° C. for 6 hours to obtain a melt;

[0037] (3) Treated by combustion method

[0038] Heat the melt obtained by drying in step (2) to 600°C at a heating rate of 2°C per minute (during the heating process, combustion occurs spontaneously), and then bake at 600°C for 8 hours to make the melt fully Decompose to get particulate matter;

[0039] (4) Treatm...

Embodiment 2

[0050]A method for preparing a high-temperature synthesis gas complete methanation catalyst, comprising the following steps:

[0051] (1) Composition and mixing of catalyst components

[0052] 8.918 g nickel nitrate Ni(NO 3 ) 2 . 6H 2 O, 22.066g aluminum nitrate Al(NO 3 ) 3 . 9H 2 O, 2.962 g lanthanum nitrate La(NO 3 ) 3 . 6H 2 O, 0.4g mass concentration is 50% manganese nitrate Mn(NO 3 ) 2 solution and 0.1 g ammonium metavanadate NH 4 VO 3 Dissolve in 50ml of absolute ethanol, and stir magnetically for 2 hours at 40°C to fully dissolve and mix the components of the catalyst;

[0053] (2) dry

[0054] drying the dissolved mixture in step (1) at a temperature of 90° C. for 6 hours to obtain a melt;

[0055] (3) Treated by combustion method

[0056] Heating the melt obtained by drying in step (2) to 700°C at a heating rate of 1°C per minute and roasting at 700°C for 8 hours to fully decompose the melt to obtain granules;

[0057] (4) Treatment by pressure impr...

Embodiment 3

[0064] A method for preparing a high-temperature synthesis gas complete methanation catalyst, comprising the following steps:

[0065] (1) Composition and mixing of catalyst components

[0066] 8.918 g nickel nitrate Ni(NO 3 ) 2 . 6H 2 O, 22.066g aluminum nitrate Al(NO 3 ) 3 . 9H 2 O, 2.962 g lanthanum nitrate La(NO 3 ) 3 . 6H 2 O and 0.1 g ammonium metavanadate NH 4 VO 3 Dissolve in 50ml of absolute ethanol, and stir magnetically for 2 hours at 40°C to fully dissolve and mix the components of the catalyst;

[0067] (2) dry

[0068] drying the dissolved mixture in step (1) at 90°C for 8 hours to obtain a melt;

[0069] (3) Treated by combustion method

[0070] Heating the melt obtained by drying in step (2) to 700°C at a heating rate of 2°C per minute and roasting at 700°C for 8 hours to fully decompose the melt to obtain granules;

[0071] (4) Treatment by pressure impregnation

[0072] Grinding and screening the particles obtained in step (3);

[0073] The...

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Abstract

The invention discloses a catalyst used in complete methanation of synthesis gas at high temperature, and the catalyst comprises the following ingredients in percentage by weight: 10-30wt% of nickel, 11-20wt% of lanthanum, 1-5wt% of cerium, 0.1-2wt% of one or a plurality of manganese, lithium and vanadium and the balance of aluminium oxide, wherein the sum of the weight percentages of all the ingredients is 100%. The preparation method of the catalyst comprises the following steps: (1) combining and mixing catalyst ingredients; (2) drying to obtain a fusant; (3) heating the fusant to 600-800DEG C at the heating speed of 1-4DEG C per minute, and roasting at the temperature of 600-800DEG C for 6-8 hours to obtain particulate matters; and (4) grinding and screening the particulate matters, and processing by a pressure impregnation method to obtain a target product. The catalyst has the positive effects that the prepared catalyst is suitable for being operated and applied under the condition of high temperature, high pressure and high airspeed, and the equipment has higher material processing capability. The catalyst not only can be used for gas with high heating value and coal-derived natural gas in production and used for methanating CO tail gas of the industrial electric furnace but also can be used for purifying and separating synthesis gas and small amounts of CO and CO2.

Description

technical field [0001] The invention relates to the technical field of catalysts and their preparation, in particular to a high-temperature synthetic gas complete methanation catalyst and a preparation method thereof. Background technique [0002] Natural gas is a high-quality energy source that is clean, convenient to transport, and safe to use, and its main component is methane. Due to the advantages of natural gas, it has become one of the main fuels for residents in many large and medium cities, and with the acceleration of urbanization and the improvement of people's living standards, people's demand for natural gas is increasing. [0003] my country's energy resources are characterized by rich coal, little gas (natural gas), and poor oil (petroleum). Therefore, coal consumption accounts for about 70% of primary energy consumption. Due to the high energy conversion rate of coal-to-natural gas, low water consumption, and relatively simple waste disposal, it has become ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889C07C9/04C07C1/04
Inventor 应卫勇房鼎业赵安民张海涛曹发海李涛马宏方钱炜鑫
Owner EAST CHINA UNIV OF SCI & TECH
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