Sulfur-resistant catalytic deoxidization process for methane-rich gas

A methane gas, catalytic deoxidation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, organic chemistry, etc. High labor intensity, expensive catalyst and other problems, to achieve the effect of simple operation, cost saving and easy automatic control

Inactive Publication Date: 2008-03-12
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the catalyst is expensive, and because methane-rich gas contains sulfide, and sulfur is poisonous to noble metals, causing catalyst deactivation, so desulfurization must be carried out before deoxidation and then deoxidation reaction, which results in deoxidation costs. increase, resulting in higher cost of catalytic deoxidation treatment of coalbed methane
But the disadvantage is that this method consumes precious coke resources, and the consumption cost of coke is about 50% of the entire operating cost.
In addition, the coke deoxidation method is labor-intensive in adding coke and slag, and the environment is dusty, and there are various forms of sulfide in the coke.

Method used

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  • Sulfur-resistant catalytic deoxidization process for methane-rich gas

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Embodiment 1

[0036] This embodiment is a sulfur-resistant catalytic deoxidation process for coalbed methane:

[0037] The raw coalbed methane is preheated by the preheater and directly enters the deoxidation reactor. Under the conditions of normal pressure and temperature of 500-550°C, the space velocity is 2500h -1 , in the catalyst bed, the methane in the coalbed methane reacts with oxygen to generate carbon dioxide and water, and at the same time a small amount of methane is cracked to produce carbon and hydrogen, and the carbon and hydrogen produced by the cracking react with oxygen, so as to effectively remove the oxygen in the coalbed gas In addition, by circulating the partially deoxidized and cooled coalbed methane to the raw coalbed methane before deoxidation, the oxygen content entering the reactor is adjusted to an appropriate range of 1-1.5%, and the reaction temperature is controlled within the range of 500-550°C.

[0038]The catalyst used in the deoxidation process of this ex...

Embodiment 2

[0043] This embodiment is a sulfur-resistant catalytic deoxidation process for coalbed methane:

[0044] The raw coalbed methane is preheated by the preheater and directly enters the deoxidation reactor. Under the conditions of normal pressure and temperature of 500-550°C, the space velocity is 1000h -1 , in the catalyst bed, the methane in the coalbed methane reacts with oxygen to generate carbon dioxide and water, and at the same time a small amount of methane is cracked to produce carbon and hydrogen, and the carbon and hydrogen produced by the cracking react with oxygen, so as to effectively remove the oxygen in the coalbed gas In addition, by circulating the partially deoxygenated and cooled coalbed methane to the raw coalbed methane before deoxidation, the oxygen content entering the reactor is adjusted to an appropriate range of 2.5-3%, and the reaction temperature is controlled within the range of 500-550°C.

[0045] The catalyst used in the deoxygenation process of th...

Embodiment 3

[0050] This embodiment is a sulfur-resistant catalytic deoxidation process for coalbed methane:

[0051] The raw coalbed methane is preheated by the preheater and directly enters the deoxidation reactor. Under the conditions of normal pressure and temperature of 600-650°C, the space velocity is 2000h -1 , in the catalyst bed, the methane in the coalbed methane reacts with oxygen to generate carbon dioxide and water, and at the same time a small amount of methane is cracked to produce carbon and hydrogen, and the carbon and hydrogen produced by the cracking react with oxygen, so as to effectively remove the oxygen in the coalbed gas In addition, by circulating partially deoxidized and cooled coalbed methane to raw coalbed methane before deoxidation, adjust the oxygen content entering the reactor to an appropriate range of 3.5-4%, and control the reaction temperature within the range of 600-650°C.

[0052] The catalyst used in the deoxidation process of this example is a ring-sh...

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Abstract

The present invention discloses a sulfur wearable and catalyzing and oxidizing method for gas abundant of firedamp; the raw material gas abundant of firedamp such as coal bed gas firstly passes through a preheater for preheating, and then enters a oxidizing reaction device; under the condition of 0-0.5MPa of pressure, 500-750 DEG C of reaction temperature, 1000-3000h-1of reaction air speed, the firedamp in the air is reacted with oxygen to produce carbon dioxide and water in manganese base sulfur wearable and catalyzing and oxidizing bed; at the same time, a small quantity of firedamp is decomposed to produce carbon and hydrogen gas; the carbon and the hydrogen after being decomposed are also reacted with oxygen so as to reach the purpose of getting rid of oxygen in the airs abundant of firedamp effectively. The present invention adopts much newer and more economical new catalyzer, which does not need to desulfurize firstly for the air; the air can directly enter the oxidization reaction device for oxidization. So the present invention can decrease the cost and simplify the technics process.

Description

technical field [0001] The invention belongs to the technical field of gas deoxidation, in particular to a sulfur-resistant catalytic deoxidation process for methane-rich gas. Background technique [0002] Methane-rich gases mainly include coal bed methane (commonly known as gas), landfill gas, etc., and the main components are methane. [0003] Coalbed methane exists in large quantities in coal seams, and is an unconventional natural gas; it is one of the main causes of underground accidents in coal mines. In fact, coalbed methane is a new energy with high calorific value and no pollution. It can be used as fuel for power generation, process fuel, chemical raw material and residential fuel. my country emits about 30 billion cubic meters of coal-bed methane into the atmosphere every year, causing huge environmental pressure and waste of resources. Reasonable and comprehensive utilization of coalbed methane can make up for my country's energy shortage. At the same time, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C9/04C07C7/148B01J23/34
Inventor 胡善霖陈耀壮廖炯曾健雷菊梅马磊
Owner HAO HUA CHENGDU TECH
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