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Reactor applied to gas-phase exothermic reaction

An exothermic reaction and reactor technology, applied in the field of reactors, can solve problems such as complex process routes, and achieve the effects of reducing equipment investment costs, increasing single-layer conversion rate, and reasonable bed temperature sequence

Active Publication Date: 2011-07-27
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Its existing defect is: (1) in order to improve the conversion rate of carbon monoxide, need a plurality of fixed-bed adiabatic reactors to be used in series
In addition, the existing methane production process from syngas requires multiple fixed-bed adiabatic reactors to be used in series, resulting in the need for multiple heat exchangers to remove the reaction heat throughout the process, and the process route is complicated

Method used

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  • Reactor applied to gas-phase exothermic reaction
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Examples

Experimental program
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Effect test

Embodiment 1

[0039] Raw gas composition: CO: 17.82%, CO 2 : 1.62%, N 2 +Ar 0.54%, H 2 : 61.01%, CH 4 : 19.01%, a total of 100.00, raw material gas temperature 32 ° C, reaction pressure 5.0 MPa, into the air-cooled - chilled - water-cooled reactor, the raw material gas and the gas in the reaction tube heat exchange, the temperature rises to 230 ° C, in the air-cooled In the section, the raw material gas reacts in the reaction tube 9, and the temperature rises from 230°C to 400°C. In the cooling shock section, the reaction gas with a reaction temperature of 400°C is mixed with the raw material gas with a temperature of 32°C. The temperature of the mixed gas is 240°C, enter the water cooling section for reaction, the temperature of the reaction gas rises from 240°C to 275°C. CO and CO in raw materials 2 The overall conversion rate was 99.7%,

[0040] The outlet gas composition is: CO 0.09%, CO 2 0.01%, N 2 +Ar 0.89%, H 20.41%, CH 4 63.43%, H 2 O35.17%;

[0041] Export gas dry bas...

Embodiment 2

[0043] Raw gas composition: CO 17.82%, CO 2 1.62%, N 2 +Ar 0.54%, H 2 61.01%, CH 4 19.01%, the total is 100.00, the raw material gas temperature is 32°C, the reaction pressure is 8.0MPa, enters the air-cooled-cold shock-water-cooled reactor, the raw material gas exchanges heat with the gas in the reaction tube, and the temperature rises to 230°C, in the air-cooled section , the raw material gas reacts in the reaction tube 9, and the temperature rises from 230°C to 420°C. In the shock section, the reaction gas with a reaction temperature of 400°C is mixed with the raw material gas with a temperature of 32°C, and the temperature of the mixed gas is 250°C. °C, enter the water-cooling section for reaction, and the temperature of the reaction gas rises from 250 °C to 280 °C. CO and CO in raw materials 2 The overall conversion rate was 99.9%,

[0044] The outlet gas composition is: CO 0.03%, CO 2 0.00%, N 2 +Ar 0.89%, H 2 0.22%, CH 4 63.58%, H 2 O35.28%;

[0045] Ex...

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Abstract

The invention relates to a reactor applied to gas-phase exothermic reaction. The reactor consists of a water-cooling reaction part, a gas-cooling reaction part and a gas cold-shocking part, wherein the water-cooling reaction part is communicated with the gas-cooling reaction part through the gas cold-shocking part; and the water-cooling reaction part, the gas-cooling reaction part and the gas cold-shocking part are integrated in a cylindrical closed container. The reactor applied to the gas-phase exothermic reaction (in particular to methane preparation by synthesis gas) has the best advantages that: a temperature sequence of a bed of the reactor is reasonable; single-layer conversion rate is improved; and one reactor can replace a plurality of conventional synthesis reactors so as to reduce the investment cost of a device.

Description

technical field [0001] The invention relates to a reactor suitable for gas-phase exothermic reaction, in particular to a reactor suitable for preparing methane from synthesis gas. Background technique [0002] The production of methane from syngas is a strongly exothermic reaction, and its reaction equation is as follows: [0003] [0004] [0005] The characteristics of the reaction are: reversible, exothermic, volume reduction. The catalyst is generally a nickel-based catalyst, the reaction pressure is 3MPa-7MPa, the reaction temperature is 250°C-650°C, and the reaction speed is fast. [0006] At present, most of the reactors used for producing methane from syngas are fixed-bed adiabatic reactors. Its existing defects are: (1) In order to improve the conversion rate of carbon monoxide, multiple fixed-bed adiabatic reactors need to be used in series. In other words, the conversion of carbon monoxide in a single fixed bed adiabatic reactor is not high. (2) Due to t...

Claims

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Application Information

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IPC IPC(8): B01J8/06B01J19/32C07C9/04C07C1/02
Inventor 刘殿华房鼎业应卫勇曹发海丁百全李涛张海涛马宏方
Owner EAST CHINA UNIV OF SCI & TECH
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