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Nickel-based catalyst, preparation method thereof and method for catalyzing methane cracking to produce hydrogen

A nickel-based catalyst, a technology for producing hydrogen, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low production efficiency and unfavorable large-scale hydrogen production , the process is cumbersome and other problems, to avoid the deposition of carbon powder, to efficiently regenerate the catalyst, and to increase the contact time.

Active Publication Date: 2015-10-28
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen conversion rate of the catalyst is low, and the purpose of large-scale hydrogen production cannot be achieved.
[0015] And it is worth noting that the current hydrogen production and synthesis gas technology basically adopts fixed bed operation, the process is relatively cumbersome, and the production efficiency is low, which is not conducive to the efficient large-scale production of hydrogen, and is not conducive to reducing the production cost of products. , and the carbon deposits are not well utilized, reducing the economic benefits of the entire process
[0016] Due to the advantages and disadvantages of the above existing technologies, the new method of catalytic cracking of methane to produce hydrogen still needs to be further developed

Method used

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  • Nickel-based catalyst, preparation method thereof and method for catalyzing methane cracking to produce hydrogen
  • Nickel-based catalyst, preparation method thereof and method for catalyzing methane cracking to produce hydrogen
  • Nickel-based catalyst, preparation method thereof and method for catalyzing methane cracking to produce hydrogen

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Effect test

Embodiment 1

[0083] This embodiment provides a nickel-based catalyst that catalyzes the cracking of methane to produce hydrogen. The nickel-based catalyst is prepared by the following method:

[0084]Add 300.48g of deionized water to 78.25g of pseudo-boehmite, stir well with 80°C water bath, add hydrochloric acid to adjust the pH value to about 3-4, and obtain the gel of the carrier; mix 15.6g of cobalt nitrate, 16.2g Mix phosphotungstic acid into the prepared gel, then add 70g of deionized water, stir evenly, then add 100mL of 0.1mol / L potassium carbonate solution dropwise at a speed of 1mL / min, and dry at 150°C 24 hours, then roasted at 400°C for 18 hours, cooled, crushed and sieved to obtain a modified carrier; weigh 50g of the modified carrier and add it to an aqueous solution of 39.8g of nickel nitrate and 40g of deionized water, and add 100mL of it dropwise at a rate of 1mL / min 0.1mol / L potassium carbonate solution, washed and filtered the precipitate, then dried at 140°C for 12 hour...

Embodiment 2

[0097] This embodiment provides a nickel-based catalyst that catalyzes the cracking of methane to produce hydrogen. The nickel-based catalyst is prepared by the following method:

[0098] Add 300.48g deionized water and 127.64g silica sol to 48.97g pseudo-boehmite, stir well with 80°C water bath, add hydrochloric acid to adjust the pH value to about 3-4, and obtain the gel of the carrier; Cobalt nitrate and 16.2g of phosphotungstic acid were mixed and added to the prepared gel, then 70g of deionized water was added, and mechanically stirred evenly, and then 100mL of 0.1mol / L potassium carbonate solution was added dropwise at a speed of 1mL / min. Dry at 150°C for 24 hours, then roast at 400°C for 18 hours, crush and sieve after cooling to obtain a modified carrier; weigh 50g of the modified carrier and add it to an aqueous solution of 39.8g of nickel nitrate and 40g of deionized water, at 1mL / min Add 100mL of 0.1mol / L potassium carbonate solution dropwise at a high speed, wash a...

Embodiment 3

[0102] This embodiment provides a nickel-based catalyst that catalyzes the cracking of methane to produce hydrogen. The nickel-based catalyst is prepared by the following method:

[0103] Add 90.47g of deionized water to 209.87g of silica sol to obtain a gel of the carrier; mix 16.8g of copper nitrate, 7.7g of cerium nitrate, and 1.7g of niobium hydroxide into the prepared gel, and then add 70g of Deionized water, mechanically stirred evenly, then 100mL of 0.1mol / L potassium carbonate solution was added dropwise at a rate of 1mL / min, dried at 150°C for 24 hours, then roasted at 400°C for 18 hours, cooled, crushed and sieved to obtain Modified carrier: Weigh 50g of modified carrier and add it to the aqueous solution of 39.8g nickel nitrate and 40g deionized water, add 100mL of 0.1mol / L potassium carbonate solution dropwise at a speed of 1mL / min, wash and filter the precipitate, Dry at ℃ for 12 hours, then bake at 700℃ for 17 hours, after cooling, crush and sieve to obtain the c...

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Abstract

The invention provides a nickel-based catalyst, a preparation method thereof and a method for catalyzing methane cracking to produce hydrogen. The catalyst includes a nickel-based composite metal oxide with a general formula shown as xX.yA.zB.(100-x-y-z)M, wherein X is Ni and / or its oxide, A is an auxiliary metal component, B is an assistant metal component, and M is a carrier. The method for catalyzing methane cracking to produce hydrogen includes: contacting methane-containing feed gas with the catalyst in a high density circulating fluidized bed reactor, and carrying out catalytic cracking reaction to obtain hydrogen containing product-gas and a deactivated catalyst, performing separation in a settler, letting the catalyst carry carbon deposit to enter a regenerator for regeneration, thus obtaining regenerated flue gas containing CO or synthetic gas, and letting the regenerated catalyst enter the reactor again. The heat generated by regeneration supplies the energy need of the whole system to realize self-heating operation. The method provided by the invention can realize large-scale continuous production of hydrogen at low price, and can effectively reduce energy consumption and save the production cost.

Description

technical field [0001] The invention belongs to the technical fields of chemical preparation and petroleum and natural gas chemical production, and particularly relates to a nickel-based catalyst for catalytic methane cracking to produce hydrogen and a preparation method thereof, and a method for methane catalytic cracking to produce hydrogen. Background technique [0002] Natural gas is a very rich petrochemical fuel resource. The proven natural gas reserves in the world are 142.1 trillion cubic meters, and the prospective reserves are 250-350 trillion cubic meters. my country's proven natural gas reserves are 3.1 trillion cubic meters, and the prospective reserves are 26-33 trillion cubic meters, accounting for about 1 / 10 of the world's prospective reserves. Methane is the main component of natural gas, and its content exceeds 90%. Therefore, many countries in the world have attached great importance to the processing and utilization of methane in recent years. The hydrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J23/847C01B3/26
CPCY02P20/584
Inventor 陈小博李春义徐少军陈静梁威杨朝合山红红刘熠斌张强
Owner BC P INC CHINA NAT PETROLEUM CORP
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