Hydrogen production method by steam reforming in combined reactor and device thereof

A technology of reactor and steam, which is applied in the field of reforming hydrogen production in fixed bed-semi-circulating fluidized bed composite reactor, can solve the problems of reduced catalyst activity, high cost, complicated preparation process, etc., and achieve significant social benefits and Economic benefits, reduction of hydrogen production costs, and shortening of the process flow

Inactive Publication Date: 2012-10-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantages of this patent are: (1) the structure of the device is complicated and the cost is high; (2) the solid adsorbent frequently collides and rubs against the catalyst coated on the grid during the flow process, which easily causes the loss of the active components of the catalyst and reduces the (3) coating the catalyst on the grid, the preparation process is more complicated, the production cost is high, and when the catalyst is deactivated, it is difficult to replace and the operation is complicated

Method used

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  • Hydrogen production method by steam reforming in combined reactor and device thereof
  • Hydrogen production method by steam reforming in combined reactor and device thereof
  • Hydrogen production method by steam reforming in combined reactor and device thereof

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Effect test

Embodiment 1

[0042] Such as figure 1 As shown, a combined reactor steam reforming hydrogen production plant includes two parts: a fixed bed reactor 1 and a semi-circulating fluidized bed reactor.

[0043] The fixed bed reactor 1 is a conventional fixed bed reactor. In the fixed-bed reactor 1, an industrial cylindrical nickel-based catalyst is installed. After the raw material and water vapor are passed through the gas inlet 1-1 at the top of the fixed bed reactor 1, in the fixed bed reactor 1, under the action of the industrial cylindrical nickel-based catalyst, high-temperature catalytic regeneration is carried out. The whole reaction produces a mixed gas. The mixed gas is transported to the gas outlet 1-2 at the bottom end of the fixed bed reactor 1 and the gas pipe and the gas inlet 2-1-3 at the bottom end of the fluidized bed riser reactor 2-1. In the fluidized bed riser reactor 2-1, under the action of nickel-based catalyst particles and carbon dioxide adsorbent particles, carbon d...

Embodiment 2

[0060] A compound reactor steam reforming hydrogen production device, same as embodiment 1. in:

[0061] The inner diameter of the fluidized bed riser reactor 2-1 is 300mm. The opening ratio of the first gas distribution plate 2-1-4 is 10%, and the hole diameter is 0.5mm. The particle size of the nickel-based catalyst particle is 500 μm, and the particle size of the carbon dioxide adsorbent particle is 45 μm; the mass ratio of the nickel-based catalyst particle to the mass of the carbon dioxide adsorbent particle is 1:10. The included angle between the return leg 2-2-3 of the cyclone separator 2-2 and the adsorbent regenerator 2-3 is 15°. The inner diameter of the upper circular tube of the adsorbent regenerator 2-3 is 500mm. The included angle between the inclined pipe 2-3-6 and the fluidized bed riser reactor 2-1 is 20°. The opening ratio of the second gas distribution plate 2-3-4 is 1%, and the hole diameter is 2.5mm.

[0062] A method for producing hydrogen by steam r...

Embodiment 3

[0068] A compound reactor steam reforming hydrogen production device, same as embodiment 1. in:

[0069] The inner diameter of the fluidized bed riser reactor 2-1 is 3000mm. The opening ratio of the first gas distribution plate 2-1-4 is 1%, and the hole diameter is 2.5mm. The particle size of the nickel-based catalyst particle is 800 μm, and the particle size of the carbon dioxide adsorbent particle is 150 μm; the ratio of the mass of the nickel-based catalyst particle to the mass of the carbon dioxide adsorbent particle is 1:2. The included angle between the return leg 2-2-3 of the cyclone separator 2-2 and the adsorbent regenerator 2-3 is 45°. The inner diameter of the upper circular tube of the adsorbent regenerator 2-3 is 5000mm. The included angle between the inclined pipe 2-3-6 and the fluidized bed riser reactor 2-1 is 30°. The opening ratio of the second gas distribution plate 2-3-4 is 15%, and the hole diameter is 0.5mm.

[0070] A method for hydrogen production ...

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Abstract

A hydrogen production method by steam reforming in a combined reactor and a device thereof belong to the technical field of a hydrogen production technology by steam reforming of light dydrocarbon. The device provided by the invention comprises a fixed-bed reactor and a half-cycle fluidized bed reactor. The method is realized by the use of the device, and natural gas or dry gas for oil refining or light oil is used as a raw material. The method comprises the following steps: reducing a nickel based catalyst, carrying out a catalytic reforming reaction in the fixed-bed reactor, carrying out a catalytic reforming reaction again as well as a carbon dioxide adsorption reaction in a riser reactor of the fluidized bed, carrying out gas-solid separation to prepare the hydrogen product, and regenerating and utilizing carbon dioxide adsorbent particles. The invention has characteristics of short process flow, simple operation, energy conservation, low production cost, high hydrogen production efficiency, high purity of the hydrogen product, complete utilization of resources, no environmental pollution and the like. The invention can be widely applied in hydrogen production by steam reforming. The hydrogen prepared by the adoption of the method can be extensively applied in the fields of petroleum, chemical industry, metallurgy and the like.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by steam reforming of light hydrocarbons, and in particular relates to a method and a device for reforming hydrogen production using a fixed bed-semi-circulating fluidized bed composite reactor. Background technique [0002] With the shortage of domestic crude oil resources, a large amount of sulfur-containing crude oil is imported from abroad, so the sulfur content in crude oil increases accordingly. However, the market's environmental protection requirements for oil products are constantly improving, which requires hydrorefining of cracked oil. To meet the demand, resulting in a substantial increase in the demand for hydrogen. At present, light oil and natural gas are the main raw materials for hydrogen production, and the production process is mainly steam reforming. Traditional steam reforming needs to be carried out at high temperature, and two-stage fixed-bed reactors are usuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/38
CPCY02A50/2351
Inventor 陈恒志刘静
Owner CHONGQING UNIV
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