Methane-reforming and hydrogen-production method

A technology for reforming hydrogen and methane production, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve problems such as wasting energy and increasing reduction processes, reducing wear and tear, continuous reaction, and simplifying device construction and operation process. Effect

Active Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at increasing CO in methane reforming hydrogen production process 2 The traditional reactor is no longer suitable for the adsorbent-enhanced reaction process, and a new reactor structure type is required, which can not only meet the requirements of process intensification, but also avoid the regeneration of the catalyst active components with the regeneration of the adsorbent, and additionally increase the reduction process , wasted energy

Method used

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  • Methane-reforming and hydrogen-production method

Examples

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Effect test

Embodiment 1

[0048] Example 1 illustrates the effect of adopting the method for producing hydrogen by steam reforming of methane provided by the present invention.

[0049] Preparation of reforming catalyst: Use alumina as a carrier, impregnate with nickel nitrate solution, then dry, then contact with aluminum colloidal solution containing nitric acid to form a paste, extrude into strips, and then dry at 120°C for 180 minutes, The dried catalyst was calcined at 500° C. for 4 hours to obtain a catalyst whose nickel content was 10 wt%.

[0050] CO 2 Preparation of adsorbent: Add a certain amount of nano-scale calcium carbonate to alumina hydrosol with a solid content of 10%, add a small amount of water and stir evenly, add nano-scale calcium carbonate, mix well, spray dry, and calcinate to obtain an average particle size of 70 microns CO 2 Adsorbent, its CaO composition is 50%, the rest is alumina.

[0051] The methane hydrogen production reaction unit adopts image 3In the reaction rege...

Embodiment 2

[0056] The methane hydrogen production reaction unit adopts the attached image 3 The device proposed by the present invention shown, the reactor adopts the attached figure 1 In the reactor type shown, the regenerator adopts a conventional moving bed reactor. The catalyst is a methane reforming hydrogen generator, and its preparation is the same as in Example 1. The main active ingredient is Ni with a content of 15 wt%, and the carrier is alumina. The catalyst is placed in a fixed bed inside the reactor. CO 2 The preparation of the adsorbent is the same as in Example 1, the main active ingredient is calcium oxide with a content of 40 wt%, and the carrier is silicon oxide. After the adsorbent is treated in the regenerator, it is transported to the moving bed in the reactor. Methane and steam are introduced into the reactor for reforming reaction, and the deactivated adsorbent is removed from the reactor and entered into the regenerator for regeneration and recycling.

[00...

Embodiment 3

[0059] The methane hydrogen production reaction unit adopts image 3 The device proposed by the present invention shown, the reactor adopts figure 2 In the reactor type shown, the regenerator adopts a conventional moving bed reactor. The catalyst is a methane reforming hydrogen production agent, the main active component is Ni, and the carrier is alumina. The catalyst is placed in a fixed bed inside the reactor. CO 2 The preparation of the adsorbent is the same as in Example 1, the main active ingredient is calcium oxide with a content of 70 wt%, and the carrier is silicon oxide. After the adsorbent is treated in the regenerator, it is transported to the moving bed in the reactor. Methane and steam are introduced into the reactor for reforming reaction, and the deactivated adsorbent is removed from the reactor and entered into the regenerator for regeneration and recycling.

[0060] Hydrogen production conditions: fixed bed: water vapor to methane molar ratio 6, space ve...

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Abstract

A methane-reforming and hydrogen-production method adopts a fixed bed-fluidized bed reactor which is divided into a particle settling zone, a reaction zone and a gas buffer zone from top to bottom; the reaction zone is divided into a fixed bed layer and a fluidized bed layer in the radial direction from outside to inside or from inside to outside; a separation plate which enables gas to pass through and enables catalyst particles not to pass through is arranged between the lower part of the fixed bed layer as well as the fluidized bed layer and the gas buffer zone; a space between the upper part of the fixed bed layer and the particle settling zone is closed; the upper part of the fluidized bed layer communicates with the particle settling zone; the upper part of the fixed bed layer is provided with a fluid feed inlet; the particle settling zone is internally provided with a gas-solid separator; a gas phase outlet of the gas-solid separator is a fluid discharge outlet of the reactor; the fluidized bed layer is also provided with a fluidized catalyst inlet and outlet. The methane-reforming and hydrogen-production method provided by the invention simplifies device construction and operation process, saves the energy consumption, and is beneficial for realizing continuous reaction and regeneration of production.

Description

technical field [0001] The invention relates to a method for producing hydrogen by reforming methane. technical background [0002] Hydrogen is an important gas raw material, which is widely used in oil refining, chemical industry, metallurgy and other industries, and it is also a clean battery fuel. Steam reforming of methane is currently the method with the lowest cost and the largest amount of hydrogen production in hydrogen production. About 50% of hydrogen is produced through natural gas steam reforming. Fixed-bed reactors are mostly used for hydrogen production by steam reforming of methane. The hydrogen production process includes a one-stage or two-stage conversion reaction at 800-820°C. 2 and H 2 , to further remove CO and CO by solvent absorption or methanol washing 2 , CO in the final equilibrium product 2 The content is 15-20%, H 2 The content is less than 75%, and high-purity H can be obtained by pressure swing adsorption 2 . Hydrogen production by steam ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/44
Inventor 朱丙田侯栓弟武雪峰汪燮卿李锐张久顺毛安国张哲民张同旺赵俊杰刘凌涛宋宁宁
Owner CHINA PETROLEUM & CHEM CORP
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