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Method for producing hydrogen with high yield and high purity by reforming and transforming dry refinery gas

A refinery dry gas, high-purity technology, used in chemical instruments and methods, hydrogen and hydrogen separation, etc., can solve the problems of low hydrogen yield and low purity, and achieve catalytic efficiency, high yield, and improved yield. The effect of rate and purity

Inactive Publication Date: 2014-02-05
SICHUAN TECHAIRS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a high-yield, high-purity refinery dry gas reforming conversion method for hydrogen production, which solves the problem of low hydrogen yield and relatively low purity in the previous refinery dry gas conversion process for hydrogen production The problem

Method used

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  • Method for producing hydrogen with high yield and high purity by reforming and transforming dry refinery gas
  • Method for producing hydrogen with high yield and high purity by reforming and transforming dry refinery gas
  • Method for producing hydrogen with high yield and high purity by reforming and transforming dry refinery gas

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Embodiment 1

[0039] Such as figure 1 As shown, a method of high yield and high purity refinery dry gas reforming conversion hydrogen production described in this embodiment comprises the following steps:

[0040] (1) Membrane separation: the hydrogen concentration is 25% (volume ratio), the methane concentration is 50% (volume ratio), the nitrogen concentration is 21% (volume ratio), and the concentration of C2 and above fractions is 4% (volume ratio) The dry gas of the refinery is separated by membrane, the permeate side is enriched with hydrogen, the non-permeate side is enriched with methane, ethylene, ethane and fractions above C2, and the non-permeate side also includes some other gases, such as a small amount of hydrogen, nitrogen, etc.;

[0041](2) Refining hydrogen extraction: the hydrogen enriched on the permeate side in step (1) is subjected to pressure swing adsorption at a pressure of 1 MPa and a temperature of 20°C to obtain product hydrogen, at which point the purity of hydro...

Embodiment 2

[0048] Such as figure 1 As shown, a method of high yield and high purity refinery dry gas reforming conversion hydrogen production described in this embodiment comprises the following steps:

[0049] (1) Membrane separation: the hydrogen concentration is 40% (volume ratio), the methane concentration is 35% (volume ratio), the nitrogen concentration is 22.5% (volume ratio), and the concentration of C2 and above fractions is 2.5% (volume ratio) The dry gas of the refinery is separated by membrane, the permeate side is enriched with hydrogen, the non-permeate side is enriched with methane, ethylene, ethane and fractions above C2, and the non-permeate side also includes some other gases, such as a small amount of hydrogen, nitrogen, etc.;

[0050] (2) Refining hydrogen extraction: The hydrogen enriched on the permeate side in step (1) is subjected to pressure swing adsorption under the conditions of a pressure of 1.5MPa and a temperature of 30°C to obtain product hydrogen, at whic...

Embodiment 3

[0057] Such as figure 1 As shown, a high-yield, high-purity refinery dry gas reforming method for hydrogen production described in this example includes the following steps: the concentration of hydrogen is 40% (volume ratio), and the concentration of methane is 30% ( Refinery dry gas with a nitrogen concentration of 27% (volume ratio) and a fraction concentration of C2 and above 3% (volume ratio) is separated through membranes, the permeate side is enriched with hydrogen, and the non-permeate side is enriched with methane and ethylene Ethane and fractions above C2, the non-permeate side also includes some other gases, such as a small amount of hydrogen, nitrogen, etc.;

[0058] (2) Refining hydrogen extraction: the hydrogen enriched on the permeate side in step (1) is subjected to pressure swing adsorption at a pressure of 2 MPa and a temperature of 40°C to obtain product hydrogen;

[0059] (3) Crude deethylene: The mixed gas on the non-permeation side in step (1) is subject...

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Abstract

The invention discloses a method for producing hydrogen with high yield and high purity by reforming and transforming dry refinery gas. The method comprises the following steps: (1) separating the dry refinery gas through a membrane, enriching hydrogen on a permeation side and enriching methane, ethylene, ethane and fractions higher than C2 on a non-permeation side; (2) carrying out pressure swing adsorption on the hydrogen enriched on the permeation side in the step (1) to obtain product hydrogen; (3) carrying out pressure swing adsorption on the gases on the non-permeation side to discharge the non-adsorbed methane, the ethane and other light hydrocarbon gases; (4) reacting the methane with water vapor under the action of a catalyst to generate a mixed gas of carbon monoxide, hydrogen and carbon dioxide; (5) reacting the carbon monoxide generated in the step (4) with the water vapor to generate a mixed gas of hydrogen and carbon dioxide; and (6) carrying out pressure swing adsorption on the mixed gases to obtain the product hydrogen. The method disclosed by the invention can be used for obtaining hydrogen with high purity and obtaining high hydrogen yield as well.

Description

technical field [0001] The invention relates to the field of recovery and utilization of refinery dry gas, in particular to a high-yield, high-purity refinery dry gas reforming method for hydrogen production. Background technique [0002] The useful components in refinery dry gas are mainly hydrogen, light olefins and light alkanes. These components are very valuable in the refinery, but at present, a large amount of them have not yet been optimally utilized, but are directly used as fuel, and some are even directly ignited to vent. Refinery dry gas contains not only hydrogen, but also a large amount of light olefins and light alkanes. These components can be separated and used separately, which is more beneficial than using them directly as fuel or raw materials for reforming hydrogen production and synthesizing methanol. [0003] The adsorption separation method is a separation method that utilizes the different adsorption selectivity of the adsorbent for each component ...

Claims

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Application Information

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IPC IPC(8): C01B3/48C01B3/50
CPCY02P20/10Y02P20/129
Inventor 钟雨明高耸潘鹏牟树荣
Owner SICHUAN TECHAIRS
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