Copper-based oxygen carrier with lattice oxygen participating in methanol autothermal reforming hydrogen production, preparation and application thereof

A copper-based oxygen carrier, autothermal reforming technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, hydrogen, hydrogen/syngas production, etc., can solve the problem of high reaction temperature, unsatisfactory yield, The problem of high CO concentration in the product can achieve the effect of high hydrogen concentration, lower activation temperature, and lower CO concentration

Active Publication Date: 2021-01-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problems of high reaction temperature, high CO concentration in the product, and H 2 Insufficiencies such as unsatisfactory yield, the first purpose of the present invention is to provide a copper-based oxygen carrier (the present invention is also referred

Method used

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  • Copper-based oxygen carrier with lattice oxygen participating in methanol autothermal reforming hydrogen production, preparation and application thereof
  • Copper-based oxygen carrier with lattice oxygen participating in methanol autothermal reforming hydrogen production, preparation and application thereof
  • Copper-based oxygen carrier with lattice oxygen participating in methanol autothermal reforming hydrogen production, preparation and application thereof

Examples

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Example Embodiment

[0100] Example 1:

[0101] Preparation of Cu by citric acid sol-gel method combined with redox 2 O-Ca 2 Fe 2 o 5 oxygen carrier. Concrete steps are as follows: adopt copper nitrate (according to the Cu of synthesis 2 O-Ca 2 Fe 2 o 5In the oxygen carrier, the molar mass of Cu atoms accounts for 10 mol.% of the total molar mass of Cu, Fe, and Ca atoms (mixing), 3.636g (0.009mol) of iron nitrate and 2.125g (0.009mol) of calcium nitrate, dissolved in 60mL deionized In water, the molar ratio of the added amount of citric acid to the added amount of cations (copper, calcium, iron total amount) is 1.3. The solution was heated to 80° C. and kept stirring until a polymerized gel was formed, which was placed in an oven at 180° C. for 5 hours, and then calcined in a muffle furnace at 620° C. for 4 hours. After grinding the obtained solid powder, pass through methanol for deep reduction at 240°C for 20 minutes, then pass through a mixed gas of nitrogen and oxygen with an oxygen c...

Example Embodiment

[0108] Example 2:

[0109] Include the following steps:

[0110] Preparation of Cu by citric acid sol-gel method combined with redox 2 O-Ca 2 Fe 2 o 5 oxygen carrier. Concrete steps are as follows: adopt copper nitrate (according to the Cu of synthesis 2 O-Ca 2 Fe 2 o 5 In the oxygen carrier, Cu atom molar weight accounts for Cu, Fe, Ca atomic total molar weight 40mol.% ratio batching), 3.636g ferric nitrate and 2.125g calcium nitrate, dissolve in 60mL deionized water, the addition amount of citric acid and The molar ratio of the amount of cation added was 1.5. The solution was heated to 80° C. and kept stirring until a polymerized gel was formed, which was placed in an oven at 180° C. for 5 hours, and then calcined in a muffle furnace at 600° C. for 4 hours. After grinding the obtained solid powder, pass through methanol for deep reduction at 240°C for 20 minutes, then pass through a mixed gas with a concentration of 15vol.% nitrogen and oxygen at 220°C, and adjust ...

Example Embodiment

[0115] Example 3:

[0116] Include the following steps:

[0117] Preparation of Cu by citric acid sol-gel method combined with redox 2 O-Ca 2 Fe 2 o 5 oxygen carrier. Concrete steps are as follows: adopt copper nitrate (according to the Cu of synthesis 2 O-Ca 2 Fe 2 o 5 In the oxygen carrier, Cu atom molar weight accounts for Cu, Fe, Ca atomic total molar weight 30mol.% ratio batching), 3.636g ferric nitrate and 2.125g calcium nitrate, dissolve in 60mL deionized water, the addition amount of citric acid and The molar ratio of the amount of cation added was 2. The solution was heated to 80° C. and kept stirring until a polymerized gel was formed, which was placed in an oven at 180° C. for 5 hours, and then calcined in a muffle furnace at 640° C. for 4 hours. After grinding the obtained solid powder, pass through methanol for deep reduction at 240°C for 20 minutes, then pass through a mixed gas with a concentration of 12vol.% nitrogen and oxygen at 160°C, and adjust th...

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Abstract

The invention belongs to the technical field of combustion chemical industry and materials, and particularly discloses a copper-based oxygen carrier with lattice oxygen participating in methanol autothermal reforming hydrogen production, and the copper-based oxygen carrier is a Cu2O-Ca2Fe2O5 composite material. The invention also discloses a preparation method of the copper-based oxygen carrier and application of the copper-based oxygen carrier in hydrogen production by lattice oxygen participating in methanol autothermal reforming. The invention provides the brand-new copper-based oxygen carrier, and it is found that through interaction of cuprous oxide and Ca2Fe2O5, the lattice oxygen migration rate and activity can be regulated and controlled, the adsorption enhancement effect can be achieved, and forward movement of the reaction can be promoted. According to the copper-based oxygen carrier disclosed by the invention, the activation temperature of methanol is effectively reduced through the interaction of Cu2O-Ca2Fe2O5 components, so that the copper-based oxygen carrier is applied at a lower temperature, the methanol cracking reaction in a methanol reforming process is effectively inhibited, and the concentration of CO is greatly reduced. In conclusion, the Cu2O-Ca2Fe2O5 composite oxygen carrier is coordinated and matched, so that an unexpected effect is generated in the methanol reforming process.

Description

technical field [0001] The present invention relates to a Cu 2 O-Ca 2 Fe 2 o 5 The invention discloses a method for low-temperature reforming of methanol with an oxygen carrier chemical chain, which belongs to the technical field of combustion chemical industry and materials. Background technique [0002] Hydrogen energy is a new energy source with abundant reserves, high calorific value, and no pollution. If the hydrogen contained in the ocean is extracted, there will be 1.4×10 17 t, which produces 9,000 times as much heat as fossil fuels on Earth. At the same time, hydrogen has the highest energy-to-mass ratio, and its combustion value is much higher than that of hydrocarbons and alcohols, about 2.7 times that of gasoline or natural gas, and 3.5 times that of coal. Unlike the large amount of pollutants and greenhouse gases emitted when fossil fuels are burned, the only product of hydrogen combustion is water, which is an ideal clean energy source. The development of...

Claims

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Application Information

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IPC IPC(8): B01J23/78C01B3/32
CPCB01J23/002B01J23/78B01J2523/00C01B3/323C01B2203/0205C01B2203/0805B01J2523/17B01J2523/23B01J2523/842
Inventor 孙朝孙志强曾亮
Owner CENT SOUTH UNIV
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