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Methane vapor reforming hydrogen production process and devices thereof

A methane water vapor, reforming hydrogen production technology, applied in the direction of hydrogen, inorganic chemistry, non-metallic elements, etc., can solve the problems of the separation of adsorbent and catalyst, the service life of adsorbent is small, the service life of catalyst and so on, so as to achieve high equipment cost, The effect of reducing equipment costs and reducing material requirements

Inactive Publication Date: 2009-10-21
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the service life of the adsorbent is much shorter than the service life of the catalyst, and the adsorbent needs to be replaced continuously. In the fluidized bed reactor, the particle size of the adsorbent and the catalyst is required to be similar, and it is difficult to separate the adsorbent from the catalyst.

Method used

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  • Methane vapor reforming hydrogen production process and devices thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 In the shown gas-solid-solid adsorption enhanced methane steam reforming hydrogen production device, the feed gas A and CaO particles are fully mixed in the mixer 1a. After mixing, the gas temperature is 650°C, the pressure is 15atm, and the adsorbent The volume fraction is 5%; the molar ratio of water vapor and methane in feed gas A is 4, and the total volume flow rate is 5m 3 / h; the diameter of the catalyst particle is a cylinder with a length of φ10mm and a length of 6mm, and there is a clover-like channel in the cylinder; the inner diameter of the gas-solid-solid reactor is 100mm, and the height of the catalyst bed is 400mm; the particle diameter of the adsorbent is 30 microns; During each cycle, 10% of the adsorbent enters the regeneration reactor to regenerate at 900°C, and the adsorbent enters the next cycle of operation after regeneration; the other 90% of the adsorbent does not pass through the regeneration reactor, and 89.5% of the adsorbent dire...

Embodiment 2

[0026] like figure 1 In the shown gas-solid-solid adsorption enhanced methane steam reforming hydrogen production device, raw material gas A and the mixture particles of CaO and MgO formed by calcination of dolomite are fully mixed in the mixer 1a, and the gas temperature after mixing is 600 ℃, the pressure is 10atm, the volume fraction of the adsorbent is 5%; the molar ratio of water vapor to methane in the feed gas A is 4, and the total volume flow rate is 5m 3 / h; the particle size of the catalyst particle is a cylinder with a length of φ20mm and a length of 15mm, and there is a clover-like channel in the cylinder; the inner diameter of the gas-solid-solid reactor is 100mm, and the height of the catalyst bed is 400mm; the particle size of the adsorbent is 25 microns ;During each cycle, 10% of the adsorbent enters the regeneration reactor to be regenerated at 900°C, and the adsorbent enters the next cycle of operation after regeneration; the other 90% of the adsorbent does n...

Embodiment 3

[0028] like figure 1 In the shown gas-solid-solid adsorption enhanced methane steam reforming hydrogen production unit, raw material gas A and CaO and Al 2 o 3 (Particulates mixed in a mass ratio of 1:1) The mixture is fully mixed in the mixer 1a, the gas temperature after mixing is 650°C, the pressure is 3atm, and the volume fraction of the adsorbent is 7%; in the feed gas A, water vapor and The molar ratio of methane is 2 and the total volumetric flow rate is 5m 3 / h; the particle size of the catalyst particle is a cylinder with a length of φ10mm and a length of 6mm, and there is a clover-like channel in the cylinder; the inner diameter of the gas-solid-solid reactor is 100mm, and the height of the catalyst bed is 400mm; the particle size of the adsorbent particle is 15 microns ;During each cycle, 10% of the adsorbent enters the regeneration reactor to be regenerated at 900°C, and the adsorbent enters the next cycle of operation after regeneration; the other 90% of the ads...

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Abstract

The invention relates to a methane vapor reforming hydrogen production process and devices thereof, which belong to the technical field of petrochemical industry. The process comprises three main steps of adsorption-enhanced methane vapor reforming, separation of a product and an adsorbent, and calcination and regeneration of the adsorbent, wherein the step of the adsorption-enhanced methane vapor reforming can greatly reduce the reaction temperature, slow up the carbon deposition rate of a catalyst, and simultaneously reduce the thermal load of the material of reaction devices. The process uses a gas-solid-solid reactor to perform adsorption-enhanced vapor reforming to produce hydrogen, the adsorbent is carried by reaction gas to pass through a fixed bed reactor formed by catalyst particles, and the reaction devices can operate continuously. The main reaction devices of the process comprise the gas-solid-solid reactor for achieving the adsorption-enhanced methane vapor reforming reaction, and a fluidized bed reactor for achieving the regeneration of the adsorbent. The complete device has a simple and compact design structure.

Description

technical field [0001] The invention relates to a hydrogen production process using methane and water vapor as raw materials and a device thereof, which adopts a gas-solid-solid reactor to carry out an adsorption-enhanced methane steam reforming hydrogen production reaction, and belongs to the technical field of petrochemical industry. Background technique [0002] Steam reforming of methane has been applied for the first time since 1926 [Satterfield C.N., Heterogeneous Catalysis in Industrial Practice. New York: McGraw-Hill, 1991]. Hydrogen is the most widely used method. The traditional methane steam reforming process includes: preheating and pretreatment of raw materials, steam reforming, high and low temperature conversion of carbon monoxide, waste heat recovery, and hydrogen purification. The core is the reformer. [0003] The steam reforming reaction of methane is a strong endothermic reaction, which needs to be carried out at high temperature, 750℃~900℃. At the same ...

Claims

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Application Information

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IPC IPC(8): C01B3/34
Inventor 程易丁石翟绪丽金涌
Owner TSINGHUA UNIV
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