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Technology of combined extreacting carbon dioxide and hydrogen using medium varying gas decarbonization-varying pressure adsorption

A pressure swing adsorption and decarbonization technology, applied in carbon compounds, chemical instruments and methods, hydrogen separation, etc., can solve the problems of low pressure, increase of CO2 compression cost, etc., to improve hydrogen recovery rate, increase hydrogen recovery, and good economy foreground effect

Active Publication Date: 2006-09-06
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CO extraction with PSA 2 , to get the desorbed CO 2 Low pressure, increased CO 2 compression cost

Method used

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  • Technology of combined extreacting carbon dioxide and hydrogen using medium varying gas decarbonization-varying pressure adsorption
  • Technology of combined extreacting carbon dioxide and hydrogen using medium varying gas decarbonization-varying pressure adsorption
  • Technology of combined extreacting carbon dioxide and hydrogen using medium varying gas decarbonization-varying pressure adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 (with attached figure 2 as an example)

[0018] Using the dry gas from the catalytic cracking unit as the raw material, wet decarburization is carried out using the shift gas (composition as shown in Table 1) produced by the hydrocarbon and steam one-stage conversion hydrogen production process. The process flow is shown in the appendix figure 2 middle.

[0019] composition

H 2

CO 2

CO

CH 4

N 2

h 2 o

□

V％

73.5

13.5

1.O

4.0

8.0

saturated

100

[0020] The changed gas passes through the reboiler (E-303), separator (Z103), air cooler A-101, separator Z-102, cooler E104, gas-liquid separation tank ( Z104) after liquid separation, enter the lower part of the absorption tower (T301) in the absorption section at a pressure of 1.35Mpa and a temperature of 40°C, and pass through the absorption tower from bottom to top. Liquid phase countercurrent contact, M...

Embodiment 2

[0028] Example 2 Increase the desorption pressure on the upper part of the upper part of the regeneration tower T302 to 0.15Mpa, that is, increase the recovery of CO 2 Pressure test, other conditions are the same as in Example 1, and the composition of purge gas, flash gas and stripping gas (carbon dioxide) is shown in Table 3.

[0029] table 3

[0030]

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PUM

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Abstract

A process for extracting the high-purity H2 and CO2 from the intermediate gap generated by converting dry hydrocarbon vapor includes wet decarbonizing and pressure-varying adsorption. Its advantages are high purity, high output rate of H2, low output rate of CO2, and low cost.

Description

technical field [0001] The present invention relates to a method for separating hydrogen and carbon dioxide from medium-transformation gas produced by steam reforming, using light hydrocarbons, natural gas, refinery tail gas, dry gas from secondary processing, naphtha, etc. as raw material hydrocarbons. The process of separating the components of the shift gas by the decarburization series pressure swing adsorption combined method can obtain high-purity hydrogen and carbon dioxide with a purity greater than 98%. This method is especially suitable for hydrogen production with secondary processing tail gas of refineries as raw materials. Of which variable gas N 2 High content. This major belongs to the field of petroleum refining, and its key technologies are: [0002] Wet decarburization and pressure swing adsorption (PSA) tandem technology are adopted. Optimized by process conditions. In the appropriate reduction of CO 2 Under the condition of the recovery rate, the hydro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/50C01B31/20B01D53/047C01B32/50
Inventor 沈喜洲周炎清瞿东蕙张敬武刘家海严一民余锋夏青李炎生夏明桂
Owner CHINA PETROLEUM & CHEM CORP
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