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Catalysis deoxidization process for coal bed gas of coal mine zone

A catalytic deoxidation and coal bed methane technology, applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of methane loss and other problems, achieve the effect of reducing methane cracking, product gas volume reduction, and methane loss

Active Publication Date: 2009-08-19
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if coalbed methane containing 10% oxygen passes through the reaction once, the temperature will be as high as 1000°C, which will cause a large amount of methane to be cracked and cause methane loss.

Method used

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  • Catalysis deoxidization process for coal bed gas of coal mine zone
  • Catalysis deoxidization process for coal bed gas of coal mine zone
  • Catalysis deoxidization process for coal bed gas of coal mine zone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The catalytic deoxidation reaction process of coalbed methane in the coal mining area of ​​the present embodiment is as follows: figure 1 As shown, a 2-stage catalytic deoxygenation reaction is carried out using a 2-stage reactor:

[0033] The composition of coalbed methane (raw material coalbed methane) in coal mining area is (vol%): CH 4 50, O 2 10.5, N 2 39.5. Air volume is 30000Nm 3 / h, temperature 120℃, pressure 0.6MPa.

[0034] The raw coalbed methane is divided into two parts (12000Nm 3 / h and 18000Nm 3 / h) enter the first and second stage reactors respectively:

[0035] 40% of the total amount of raw coalbed methane is 12000Nm 3 / h (raw coalbed methane 0) into line 1, with 24000Nm from line 13 3 / h (temperature 422°C) return gas mixing, O in the gas after mixing 2 The content is 3.5%, the temperature is 330 ° C, and it enters the first-stage reactor R1 through pipeline 3, and under the action of the catalyst, the first-stage catalytic deoxygenation ...

Embodiment 2

[0040] The catalytic deoxidation reaction process of coalbed methane in the coal mining area of ​​the present embodiment is as follows: figure 2 As shown, a 3-stage catalytic deoxygenation reaction was carried out using a 3-stage reactor:

[0041] The composition of coalbed methane (raw material coalbed methane) in coal mining area is (vol%): CH 4 50, O 2 10.5, N 2 39.5. Air volume is 30000Nm 3 / h, temperature 120℃, pressure 0.6MPa.

[0042] The raw coalbed methane is divided into three parts (respectively 7500Nm3 / h, 10500Nm 3 / h and 12000Nm 3 / h) Enter the first, second and third stage reactors respectively:

[0043] 7500Nm for the first part 3 / h Raw CBM 0 enters line 1, with 15000Nm from line 17 3 / h (temperature 422°C) return gas mixing, O in the gas after mixing 2 The content is 3.5%, and the temperature is 330 ° C. It enters the first-stage reactor R1 through the pipeline 4, and under the action of the catalyst, the first-stage catalytic deoxygenation reac...

Embodiment 3

[0049] The catalytic deoxidation reaction process of coalbed methane in the coal mining area of ​​the present embodiment is as follows: image 3 As shown, a 4-stage catalytic deoxygenation reaction is carried out using a 4-stage reactor:

[0050] The composition of coalbed methane (raw material coalbed methane) in coal mining area is (vol%): CH 4 50, O 2 10.5, N 2 39.5. Air volume is 30000Nm 3 / h, temperature 120℃, pressure 0.6MPa.

[0051] The raw coalbed methane is divided into four parts (respectively 4500Nm 3 / h, 6000Nm 3 / h, 9000Nm 3 / h and 10500Nm 3 / h) Enter the first, second, third and fourth stage reactors respectively:

[0052] 4500Nm for the first part 3 / h Raw CBM 0 enters line 1, with 9000Nm from line 21 3 / h (temperature 421°C) return gas mixing, O in the gas after mixing 2 The content is 3.5%, and the temperature is 330 ° C. It enters the first-stage reactor R1 through the pipeline 5, and under the action of the catalyst, the first-stage catalytic...

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Abstract

The invention discloses a coal bed gas catalytic deoxidation technique in coal field, which adopts a multistage reactor for multilevel catalytic deoxidation reaction to control the temperature of gas at the inlet of every stage of reactor and the content of O2 in the gas at the inlet, so as to ensure the temperature of gas at the outlet of every stage of reactor to be less than or equal to 660 DEG C after the catalytic deoxidation reaction. Compared with an individual reactor, the deoxidation technique of the invention can greatly reduce the quantity of the gas that is taken as return gas and used for diluting O2 in the coal bed gas of the raw materials, thus reducing the energy consumption; meanwhile, the temperature of the gas at the outlet of the deoxidation reactor can be effectively controlled to be lower than 660 DEG C, the cracking of methane can be reduced, and the loss of the methane can be obviously lowered.

Description

technical field [0001] The invention relates to the technical field of coalbed methane utilization in coal mining areas, in particular to a catalytic deoxidation process for coalbed methane in coal mining areas. Background technique [0002] my country is rich in coalbed methane resources, with a predicted resource volume of about 31 trillion m3 3 , is the third country with the world's coalbed methane reserves. In coal mining, a large amount of coalbed methane is discharged into the atmosphere every year, which pollutes the atmospheric environment. [0003] Coalbed methane in coal mining areas is a gas rich in methane and is a clean fuel. With the tense trend of world energy and the prominent environmental problems, more and more attention is paid to the utilization of coalbed methane. At present, a large amount of coalbed methane in my country is extracted underground, mainly to ensure safe production. The methane content of the coalbed methane (CMM) obtained by the emi...

Claims

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Application Information

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IPC IPC(8): C10L3/10
Inventor 陶鹏万王晓东曾健黄维柱廖炯
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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