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Multifunctional catalyst for hydrogen production by steam reforming of methane and preparation method thereof

A technology for producing hydrogen from methane steam and reforming, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Catalytic activity, good absorption effect, stable absorption performance

Inactive Publication Date: 2015-08-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process is to uniformly mix the catalyst and the absorbent to carry out the absorption-enhanced methane steam reforming hydrogen production reaction, which not only complicates the process, but also ensures that the stability of the catalyst and the absorbent is consistent, because it is impossible to replace only the catalyst during the reaction or absorbent

Method used

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  • Multifunctional catalyst for hydrogen production by steam reforming of methane and preparation method thereof
  • Multifunctional catalyst for hydrogen production by steam reforming of methane and preparation method thereof
  • Multifunctional catalyst for hydrogen production by steam reforming of methane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 19mL of deionized water into the three-necked flask, then add 4.421g of citric acid (the molar ratio of water to citric acid is 50:1), weigh 2.340g of L-calcium lactate, 1.702g of aluminum isopropoxide powder and 0.468g of six Add nickel nitrate water into the above solution, the molar ratio of metal ion to citric acid is 1:1.2, stir at 85°C for 2h (500r / min), measure quantitative ethylene glycol (ethylene glycol and citric acid molar The ratio is 2:1) into the above mixed solution, and adjust the pH of the mixed solution to between 1-2 with nitric acid. Finally, raise the temperature to 105°C, stir and reflux under the temperature adjustment for 6 hours, stir and evaporate the above sol in the range of 85-95°C to form a gel, then pour the gel into a watch glass and put it in an oven at 110°C After drying, the dried solid was ground into powder with a mortar, and then placed in a muffle furnace for calcination at 800°C for 4 hours to obtain multifunctional catalyst ...

Embodiment 2

[0031] Add 68mL of deionized water into the three-neck flask, then add 15.884g of citric acid (the molar ratio of water to citric acid is 50:1), weigh 14.096g of L-calcium lactate, 1.702g of aluminum isopropoxide powder and 2.610g of six Add nickel nitrate in water to the above solution, the molar ratio of metal ion to citric acid is 1:1.2, stir at 85°C for 2h (600r / min), measure quantitative ethylene glycol (ethylene glycol and citric acid molar The ratio is 2:1) into the above mixed solution, and adjust the pH of the mixed solution to between 1-2 with nitric acid. Finally, raise the temperature to 105°C, stir and reflux under the temperature adjustment for 6 hours, stir and evaporate the above sol in the range of 85-95°C to form a gel, then pour the gel into a watch glass and put it in an oven at 110°C After drying, the dried solid was ground into powder with a mortar, and then placed in a muffle furnace for calcination at 850°C for 2 hours to obtain multifunctional catalyst...

Embodiment 3

[0033] Add 133mL of deionized water into the three-necked flask, then add 30.990g of citric acid (the molar ratio of water to citric acid is 50:1), weigh 28.070g of L-calcium lactate, 1.702g of aluminum isopropoxide powder and 6.842g of six Nickel nitrate in water was added to the above solution, the molar ratio of metal ions to citric acid was 1:1.2, stirred at 85°C for 2 hours (700r / min), and a quantitative amount of ethylene glycol (ethylene glycol and citric acid moles The ratio is 2:1) into the above mixed solution, and adjust the pH of the mixed solution to between 1-2 with nitric acid. Finally, heat up to 105°C, stir and reflux for 6 hours under the temperature adjustment, stir and evaporate the above sol in the range of 85-95°C to form a gel, then pour the gel into a watch glass and put it in an oven at 100°C After drying, the dried solid was ground into powder with a mortar, and then placed in a muffle furnace and calcined at 900° C. for 1.5 h to obtain the multifunct...

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Abstract

The invention relates to a novel multifunctional catalyst for absorption enhancing methane steam reforming hydrogen production and a preparation method thereof. The innovation of the invention is as follows: a multifunctional catalyst integrating a catalytic active site and an absorption active site together and having uniform distribution of composition is prepared by a one-step process, and the chemical molecular formula is Nix / CaOy-Ca5Al6O14z, wherein x is 0.10-0.25, y is 0.04-0.85, and z is 0.12-0.86. The preparation method is simple, and the prepared catalyst has excellent catalytic performance and absorptive performance. By applying the catalyst to an absorption enhancing methane steam reforming hydrogen production reaction, a relatively high methane conversion rate and hydrogen concentration can be obtained.

Description

technical field [0001] The invention relates to a multifunctional catalyst for hydrogen production by absorption-enhanced steam reforming of methane and a preparation method thereof, belonging to the field of hydrogen production by steam reforming of low-carbon hydrocarbons. Background technique [0002] Hydrogen is not only an environmentally friendly, efficient and clean secondary energy source, but also an important chemical raw material. High-purity hydrogen is widely used in industrial processes such as ammonia synthesis, methanol production, and petrochemicals. The high-efficiency and zero-pollution characteristics of hydrogen have driven the development of a new energy economy based on hydrogen, increasing the demand for hydrogen. Hydrogen production by absorption-enhanced steam reforming of methane is a relatively mature hydrogen production process in industry, and it is also the simplest and most economical hydrogen production method. [0003] Absorption-enhanced ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78C01B3/40
CPCY02P20/52
Inventor 周志明徐攀赵长军王沾祺
Owner EAST CHINA UNIV OF SCI & TECH
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