Catalyst for hydrogen production through catalytic cracking of methane and its preparation method

A methane catalysis and catalyst technology, which is applied in the field of nickel-based methane cracking hydrogen production catalyst and its preparation, achieves the effects of high methane conversion rate, reduced agglomeration, and good dispersion

Inactive Publication Date: 2012-06-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a catalyst for catalytic cracking of methane to produce hydrogen and a preparation method thereof for the deficiencies of existing methane cracking hydrogen production catalysts and its preparation method, which have the advantages of uniform dispersion of active components, good stability, high catalyst strength, and catalytic Good activity and other characteristics

Method used

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  • Catalyst for hydrogen production through catalytic cracking of methane and its preparation method
  • Catalyst for hydrogen production through catalytic cracking of methane and its preparation method
  • Catalyst for hydrogen production through catalytic cracking of methane and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The components and weight fractions of a methane catalytic cracking hydrogen production catalyst are:

[0028]

[0029] Wherein: the nickel salt is nickel acetate; the precious metal catalyst promoter is palladium; the alkaline earth metal promoter is lithium; the diameter of the nano-zirconia-zinc composite carrier is 40 nanometers, and the molar weight of the element zirconium: the ratio of the molar weight of the element zinc is 1 : 4.

[0030] A kind of preparation method of methane catalytic cracking hydrogen production catalyst concrete steps are as follows:

[0031] (1) Preparation of nano-zirconia zinc composite carrier

[0032]First press the molar weight (mol) of zirconium ion in zirconium nitrate: the molar weight (mol) of zinc ion in zinc acetate: the ratio of the hydroxide radical molar weight (mol) of sodium hydroxide is the ratio of 1: 4: 6, first Add zirconium nitrate and zinc acetate to the alkaline precipitant, adjust its pH to 8 with sodium hydro...

Embodiment 2

[0038] The components and weight fractions of a methane catalytic cracking hydrogen production catalyst are:

[0039]

[0040] Wherein: the nickel salt is nickel nitrate; the precious metal catalyst promoter is platinum; the alkaline earth metal promoter is calcium; the diameter of the nano-zirconia-zinc composite carrier is 30 nanometers, and the molar weight of element zirconium: the molar weight ratio of element zinc is 1 : 3.

[0041] A kind of preparation method of methane catalytic cracking hydrogen production catalyst, with embodiment 1, wherein:

[0042] In the (1) step, zirconium salt is zirconium oxychloride, and zinc salt is zinc nitrate, and alkaline precipitation agent is ammonium carbonate, and the molar weight (mol) of zirconium ion in zirconium oxychloride: the mole of zinc ion in zinc nitrate Amount (mol): the ratio of the hydroxide molar mass (mol) of ammonium carbonate is 1: 3: 10, the pH value is 9, the time for standing and aging is 15h, and the drying...

Embodiment 3

[0046] The components and weight fractions of a methane catalytic cracking hydrogen production catalyst are:

[0047]

[0048] Wherein: the nickel salt is nickel chloride; the noble metal catalyst promoter is ruthenium and gold; the alkaline earth metal promoter is sodium and barium; the diameter of the nano-zirconia-zinc composite carrier is 60 nanometers, and the molar weight of the element zirconium: the molar weight of the element zinc The amount ratio is 1:10.

[0049] A kind of preparation method of methane catalytic cracking hydrogen production catalyst, with embodiment 1, wherein:

[0050] In the (1) step, zirconium salt is zirconium chloride, and zinc salt is zinc sulfate, and alkaline precipitation agent is urea, and the molar weight (mol) of zirconium ion in zirconium chloride: the molar weight (mol) of zinc ion in zinc sulfate ): the ratio of the hydroxide root molar weight (mol) of urea is 1: 10: 12, the pH value adjusted with sodium hydroxide is 10, the time ...

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Abstract

Belonging to the technical field of catalysts for hydrogen production through catalytic cracking of methane, the invention relates to a catalyst for hydrogen production through catalytic cracking of methane and its preparation method. The catalyst in the invention is composed of a nickel salt, copper oxide, a precious metal catalytic promoter, an alkaline earth metal catalytic promoter, and a nanometer ZrO-ZnO composite carrier. The method in the invention comprises: taking the nickel salt, the copper oxide, the precious metal catalytic promoter, the alkaline earth metal catalytic promoter, azirconium salt, a zinc salt, and an alkaline precipitating agent as raw materials, first preparing a nanometer ZrO-ZnO composite carrier, then implementing the simple processes of mixing, ultrasonic dispersion, roasting, and moulding, thus obtaining a product. The method in the invention has the advantages of simple process, mild reaction condition, energy saving, sufficient material and liquid utilization, and no discharge of ''three wastes''. The product prepared by the method of the invention has the characteristics of high activity, good dispersibility, and strong temperature resistance, etc. The catalyst prepared by the method provided in the invention can be widely applied in catalytic cracking of methane, ethane and other low carbon alkanes, and is especially suitable for catalyticcracking of methane in a fluidized bed for hydrogen production.

Description

technical field [0001] The invention belongs to the technical field of catalysts for hydrogen production by catalytic cracking of methane, and in particular relates to a catalyst for hydrogen production by cracking nickel-based methane supported by a nano-zirconia-zinc composite and a preparation method thereof. Background technique [0002] Hydrogen energy is an ideal secondary energy source. Because of its pollution-free combustion (the product is water) and high combustion value, the combustion value per unit mass is 121061kJ / kg, which is higher than that of methane (50054kJ / kg) and gasoline (44467kJ / kg). , Methanol (20254kJ / kg), etc. are much higher, and thus have received extensive attention in recent years. Large-scale hydrogen production from natural gas mainly uses steam reforming. Traditional steam reforming needs to be carried out at high temperature. It will produce a large amount of carbon and oxygen compounds (30% volume) while producing hydrogen, and the concen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J32/00B82Y40/00C01B3/26
Inventor 陈恒志刘静
Owner CHONGQING UNIV
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