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Method and device for global warming prevention

A greenhouse and earth technology, applied in chemical instruments and methods, separation methods, greenhouse gas capture, etc., can solve problems such as a large amount of heat of reaction

Inactive Publication Date: 2001-01-17
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yet this patent application is exactly the same as the problem existing in the above-mentioned Japanese Patent Application No. Hei 5-4027, that is, there is a problem due to nitrous oxide gas (N 2 O) Problems caused by a large amount of reaction heat generated during decomposition
[0016] In other words, there is no catalytic decomposition method for nitrous oxide gas that can fully meet the needs in the prior art

Method used

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  • Method and device for global warming prevention
  • Method and device for global warming prevention
  • Method and device for global warming prevention

Examples

Experimental program
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Effect test

Embodiment 1

[0161] For the composition and flow rate shown in Table 1, discharged from adipic acid manufacturing equipment, containing nitrous oxide gas (N 2 O) Nitrous oxide gas (N) in the gas to be treated (raw material gas) 2 O) Carry out thermal decomposition reaction.

[0162] figure 2 It is a schematic explanatory diagram showing such a thermal decomposition device.

[0163] This pyrolysis reaction furnace (pyrolysis part 8) can be a kind of internal diameter be 450 millimeters, length be the cylindrical heat-resistant brick furnace of 4750 millimeters, the thickness of furnace wall is 300 millimeters. In the furnace, four thermal decomposition reaction chambers (nitrous oxide gas (N 2 O) with a decomposition reaction zone). The number of staged supply of the gas to be processed is four. The divided and preheated gas to be processed is introduced into the first reaction chamber, and the remaining divided gas to be processed is introduced into the second, third and fourth reacti...

Embodiment 2

[0166] Except that the supply temperature of the gas to be treated is 300°C and the flow rate of hydrogen gas supplied to the preheating part is 7.2 standard cubic meters per hour (Nm 3 / hr), the flow rate of the gas to be treated supplied to the preheating part, the second, the third, and the fourth reaction chamber is 55.7 standard cubic meters / hour (Nm 3 / hr), 60.0 standard cubic meters / hour (Nm 3 / hr), 72.9 standard cubic meters / hour (Nm 3 / hr), 91.4 standard cubic meters / hour (Nm 3 / hr), are the same as in Example 1, and under this condition, the nitrous oxide gas (N 2 O) Carrying out thermal decomposition.

[0167] At this time, the pressure in the pyrolysis furnace is 1.25 kg / cm2 (kg / cm 2 ), the temperature of the mixed airflow located at the entrance of the preheating part, the second, the third, and the fourth reaction chamber is 830°C respectively, and the temperature of the airflow discharged from the thermal decomposition furnace is 1027°C, so in the supplied t...

Embodiment 3

[0169] Except that the supply temperature of the gas to be treated is 700°C and the flow rate of hydrogen gas supplied to the preheating part is 0.1 standard cubic meter / hour (Nm 3 / hr), the flow rate of the gas to be treated supplied to the preheating part, the second, the third, and the fourth reaction chamber is 3 standard cubic meters / hour (Nm 3 / hr), 12.0 standard cubic meters / hour (Nm 3 / hr), 50.6 standard cubic meters / hour (Nm 3 / hr), 214.4 standard cubic meters / hour (Nm 3 / hr), are the same as in Example 1, and under this condition the nitrous oxide gas in the gas to be treated (N 2 O) Carrying out thermal decomposition.

[0170] At this time, the pressure in the pyrolysis furnace is 1.25 kg / cm2 (kg / cm 2 ), the temperature of the mixed airflow located at the entrance of the preheating part, the second, the third, and the fourth reaction chamber is 830°C respectively, and the temperature of the airflow discharged from the thermal decomposition furnace is 1263°C, so ...

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Abstract

A low-cost and practically useful method for preventing global warming by decomposing N2O wherein N2O contained in an N2O-containing gas to be treated can be decomposed at a relatively low temperature; and an apparatus therefor. That is, a method for preventing global warming comprising, in a process of thermally or catalytically decomposing N2O in an N2O-containing gas to be treated, dividing the N2O-containing gas stream to be treated in portions, preheating a portion thereof so as to exothermally decompose N2O in said gas stream to form a hot gas stream, and supplying the remainder of the divided gas stream to be treated into said hot gas stream to thereby continuously decompose N2O.

Description

Technical field [0001] The present invention relates to a processing method and a corresponding processing device for processing the gas that may aggravate the global warming effect. If more specifically, the present invention relates to the treatment of a gas that may increase the global warming effect, i.e. nitrous oxide gas (N 2 O) implement exothermic decomposition reaction, nitrous oxide gas (N 2 O) is converted to nitrogen (N 2 ), oxygen (O 2 ), and nitrogen oxides (nitrogen monoxide (NO), nitrogen dioxide (NO 2 ) etc.), and then prevent the method and corresponding device of global warming. Background technique [0002] An example of a chemical manufacturing operation using nitric acid as an oxidant in the prior art is the adipic acid manufacturing operation for the manufacture of adipic acid, which, when nitric acid is used to oxidize cyclohexanol and / or cyclohexanone, generates Atmospheric emissions of nitrous oxide gas are emitted as a by-product. [0003] Al...

Claims

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Application Information

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IPC IPC(8): B01D53/34B01D53/56B01D53/86C07C51/31C07C55/14
CPCC07C51/316B01D53/8631Y02C20/10B01D53/56B01D2257/402B01D53/8625Y02P20/151Y02P20/30Y02P20/50C07C55/14B01D53/54
Inventor 田川克志三浦功慈儿玉庄平清水敦田中克利
Owner ASAHI KASEI KK
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