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Method for producing hydrogen by reforming of methane steam

A technology for producing hydrogen from methane steam and reforming, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve problems such as low purity, low hydrogen production efficiency and yield, poor conversion capacity and cycle stability of adsorbents, etc. Achieve the effects of expanding the temperature range, promoting the hydrogen production reaction, and excellent cycle stability

Inactive Publication Date: 2015-04-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for hydrogen production by steam reforming of methane. The efficiency, output and purity of hydrogen production by steam reforming, thus solving the problem of low hydrogen production efficiency and production, and the purity low technical issues

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  • Method for producing hydrogen by reforming of methane steam
  • Method for producing hydrogen by reforming of methane steam
  • Method for producing hydrogen by reforming of methane steam

Examples

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Embodiment 1

[0036] Rice husk ash lithium silicate with a particle size of 150 μm and Ni / γ-Al 2 o 3Mix to form a mixture, and in the mixture, the mass ratio of the catalyst to the rice husk ash lithium silicate is 1:1. The molar ratio of lithium to silicon in the rice husk ash lithium silicate contained in the mixture is equal to 4.2:1. The rice husk ash lithium silicate is a calcined mixture obtained by calcination at 1000°C for 1 hour using clean rice husk and lithium carbonate. . Ni / γ-Al 2 o 3 The mass of Ni in the catalyst accounts for 20% of the mass of the entire catalyst, and the particle size of the catalyst is 180 μm. The mixture of the catalyst and the adsorbent is placed in a fixed bed reactor, and the inner diameter of the fixed bed reactor is 20mm. First pass nitrogen gas for sweeping, then pass methane water vapor mixed with methane and water vapor, the molar ratio of methane and water vapor in the methane water vapor is 4:1. The reaction temperature was set to 650° C.,...

Embodiment 2

[0039] Rice husk ash lithium silicate with a particle size of 180 μm and Ni / γ-Al 2 o 3 Mix to form a mixture, and in the mixture, the mass ratio of the catalyst to the rice husk ash lithium silicate is 2:3. The molar ratio of lithium to silicon in the rice husk ash lithium silicate contained in the mixture is equal to 6:1. The rice husk ash lithium silicate is a calcined mixture obtained by calcination at 1000°C for 3 hours with clean rice husk and lithium carbonate. . Ni / γ-Al 2 o 3 The mass of Ni in the catalyst accounts for 25% of the mass of the entire catalyst, and the particle size of the catalyst is 200 μm. The mixture of the catalyst and the adsorbent is placed in a fixed bed reactor, and the inner diameter of the fixed bed reactor is 20mm. First pass nitrogen gas for sweeping, then pass methane water vapor mixed with methane and water vapor, the molar ratio of methane and water vapor in the methane water vapor is 2:1. The reaction temperature was set to 600° C., ...

Embodiment 3

[0042] Rice husk ash lithium silicate with a particle size of 250 μm and Ni / γ-Al 2 o 3 Mix to form a mixture, and in the mixture, the mass ratio of the catalyst to the rice husk ash lithium silicate is 1:6. The molar ratio of lithium to silicon in the rice husk ash lithium silicate contained in the mixture is equal to 5:1. The rice husk ash lithium silicate is a calcined mixture obtained by calcination at 1000°C for 10 hours in advance with clean rice husk and lithium carbonate. . Ni / γ-Al 2 o 3 The mass of Ni in the catalyst accounts for 24% of the mass of the entire catalyst, and the particle size of the catalyst is 240 μm. The mixture of the catalyst and the adsorbent is placed in a fixed bed reactor, and the inner diameter of the fixed bed reactor is 20 mm. First pass nitrogen gas for sweeping, then pass methane water vapor mixed with methane and water vapor, the molar ratio of methane and water vapor in the methane water vapor is 3:1. The reaction temperature was set...

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Abstract

The invention discloses a method for producing hydrogen by reforming of methane steam and belongs to the field of hydrogen production. A mixture formed by mixing rice hull ash lithium silicate and a catalyst is applied in methane steam for producing hydrogen at a reaction temperature of 550-720 DEG C, wherein the rice hull ash lithium silicate is obtained by calcining rice husk and lithium carbonate at a high temperature of 1000 DEG C and has the particle size of 150mu m-300mu m, and the rice hull ash lithium silicate comprises a lithium element and a silicon element at a molar ratio is (4.2:1)-(8:1). Compared with the existing process for producing hydrogen, the method for producing hydrogen by reforming of methane steam and using rice hull ash lithium silicate as an adsorbent has the advantages of low cost, stable reaction, high reaction rate, high yield of hydrogen and high purity.

Description

technical field [0001] The invention belongs to the field of hydrogen production, and more specifically relates to a method for preparing hydrogen by using methane steam. Background technique [0002] The reserves of traditional fossil energy are limited and non-renewable. Extensive use will cause energy depletion and shortage, and the waste gas generated in the use of traditional fossil energy has caused serious environmental pollution and climate deterioration. In order to cope with the environmental and energy crisis and realize the sustainable development of the global economy, countries all over the world have increased the development and investment in new energy. Hydrogen is the first choice for new energy due to its high efficiency and clean characteristics. Currently, steam reforming of methane plays an important role in the hydrogen production industry. The steam methane reforming (English abbreviation: SMR) process mainly takes place in the following reactions: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/38
CPCY02P20/52
Inventor 郭欣乔霄鹏罗重奎刘亮王珂
Owner HUAZHONG UNIV OF SCI & TECH
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