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Method for preparing hydrogen with natural gas as raw material

A natural gas and raw material technology, which is applied in the field of hydrogen production using biogas as raw material, can solve the problems of high production cost, complex process, and environmental pollution, and achieve the effects of cost reduction, simple process, and simple operation

Inactive Publication Date: 2011-09-07
ALLY HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of the conventional method for preparing hydrogen from natural gas as a raw material with complex process, high production cost, high energy consumption, and environmental pollution, and provide a method for preparing hydrogen from natural gas

Method used

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  • Method for preparing hydrogen with natural gas as raw material
  • Method for preparing hydrogen with natural gas as raw material
  • Method for preparing hydrogen with natural gas as raw material

Examples

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Embodiment 1

[0031] Embodiment 1: as Figure 1-2 Shown, a kind of method that takes natural gas as raw material to prepare hydrogen is characterized in that comprising the following steps:

[0032] A. The raw natural gas at room temperature and pressure 1.2MPa is preheated to 380°C by a multi-channel heat exchanger, and then enters the desulfurization reactor for desulfurization, so that the total sulfur content in the gas is controlled at 20mg / m 3 the following;

[0033] B. After the desulfurized gas is mixed with superheated steam, it is heated to 590°C by a catalytic burner, and then sent to an adiabatic reactor, where it reacts with 410°C air under the action of a catalyst;

[0034] C, the gas obtained in step B is sent to the CO converter after heat exchange by the steam superheater, and the CO shift reaction is carried out, and the gas obtained by the reaction is sent to the membrane separator for separation, and the separation obtains product hydrogen and device tail gas;

[0035] D...

Embodiment 2

[0040] Embodiment 2: as Figure 1-2 Shown, a kind of method that takes natural gas as raw material to prepare hydrogen is characterized in that comprising the following steps:

[0041] A. Raw natural gas at room temperature and pressure 1.2MPa is preheated to 370°C by a multi-channel heat exchanger, and then enters the desulfurization reactor for desulfurization, so that the total sulfur content in the gas is controlled at 20mg / m 3 the following;

[0042] B. After the desulfurized gas is mixed with superheated steam, it is heated to 600°C by a catalytic burner, and then sent to an adiabatic reactor to react with 400°C air under the action of a catalyst;

[0043] C, the gas obtained in step B is sent to the CO converter after heat exchange by the steam superheater, and the CO shift reaction is carried out, and the gas obtained by the reaction is sent to the membrane separator for separation, and the separation obtains product hydrogen and device tail gas;

[0044] D, the devi...

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Abstract

The invention discloses a method for preparing hydrogen with natural gas as a raw material, comprising the following steps: the natural gas enters a desulphurization reactor to be desulfurized after passing through a multichannel heat exchanger; the desulfurized natural gas is mixed with overheated water vapour and then heated by a catalyzing burner before being sent into an adiabatic reactor in which the mixture of the natural gas and the overheated water vapour reacts with the air under the action of catalyst; the gas from the reaction is sent into a CO convertor for CO transformation reaction after undergoing heat transfer in a steam superheater; the gas from the reaction is sent into a membrane separator to be separated to obtain hydrogen and tail gas; the tail gas is sent into the catalyzing burner and goes through catalytic combustion reaction with air in the presence of the catalyst; the high-temperature flue gas generated in the reaction is sent into the multichannel heat exchanger for heat transfer and then heated in a steam generator for desalting water to obtain saturated vapour to be sent into the steam superheater. The invention has the advantages of simple technology, reduced production cost, low energy consumption and no pollution to the environment.

Description

technical field [0001] The invention relates to a method for preparing hydrogen by using natural gas as a raw material, in particular to a method for preparing hydrogen by using biogas as a raw material for heat provided by a catalytic combustion process. Background technique [0002] Natural gas is a clean energy with low sulfur content and low pollution. There are two main methods for producing hydrogen from natural gas: partial oxidation and steam reforming. The raw materials of the former method are basically heavy hydrocarbons (heavy oil, residual oil, asphalt, etc.), and the raw materials of the latter method are light hydrocarbons (natural gas, refining gas, oilfield gas, light oil, etc.). The pressure converted by the two methods is also different, the former is from normal pressure to 9.0MPa, and the latter is from normal pressure to 4.5MPa. Since the natural gas partial oxidation method is not as economical as the natural gas steam reforming method, the current h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/38
Inventor 王业勤陈志国杜雯雯
Owner ALLY HI TECH CO LTD
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