High-dispersion nano-composite catalyst, and preparation method and applications thereof

A nanocomposite, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as easy deactivation and poor stability

Inactive Publication Date: 2013-06-12
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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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 overcome the defects of poor stability and easy deactivation of existing methane dry reforming catalysts, and to provide a high-activity, high-stability nanocomposite catalyst and its preparation method and application

Method used

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  • High-dispersion nano-composite catalyst, and preparation method and applications thereof
  • High-dispersion nano-composite catalyst, and preparation method and applications thereof
  • High-dispersion nano-composite catalyst, and preparation method and applications thereof

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preparation example Construction

[0034] The present invention also relates to a preparation method of a highly dispersed nanocomposite catalyst, the method comprising the following steps:

[0035] (1) Prepare mixed salt solution and alkaline precipitant solution respectively;

[0036] (2) co-precipitating the mixed salt solution and the alkaline precipitant solution to obtain a composite precipitate;

[0037] (3) reflux aging the composite precipitate to obtain aged composite precipitate; and

[0038] (4) Drying and roasting the aged composite precipitate.

[0039] In the preparation process of the above step (1), the preparation of the mixed salt solution is to mix a certain amount of precursors of active metal oxides, precursors of basic oxide promoters, precursors of redox additives, The precursor of the zirconia support is dissolved in a certain amount of water. The "certain amount" of the precursor of the active metal oxide, the precursor of the basic oxide promoter, the precursor of the redox auxilia...

Embodiment 1

[0060] First, a highly dispersed nanocomposite catalyst is prepared, which includes the following steps (1)-(4).

[0061] (1) Preparation of mixed salt solution and alkaline precipitant: Active metal oxide NiO, alkaline oxide promoter CaO, carrier ZrO in 10g nanocomposite catalyst 2 The mass fraction is 13%, 5%, and 82% to calculate the mass of nickel nitrate, calcium nitrate and zirconium nitrate, and calculate the amount of deionized water required with the concentration of zirconium nitrate as 0.1mol / L. The required nickel nitrate, calcium nitrate and zirconium nitrate are dissolved in deionized water to form a mixed salt solution. Using NaOH solution as a precipitating agent, prepare an aqueous solution with a NaOH concentration of 1 mol / L.

[0062] (2) Co-precipitation of mixed salt solution: under strong stirring, co-current co-precipitation of mixed salt solution and alkaline precipitant to obtain composite precipitate. During the co-precipitation process, the tempera...

Embodiment 2

[0072] First, a highly dispersed nanocomposite catalyst is prepared, which includes the following steps (1)-(4).

[0073] (1) Preparation of mixed salt solution and alkaline precipitant: Active metal oxide NiO, alkaline oxide promoter CaO, and redox additive CeO in 10 g of nanocomposite catalysts 2 , Carrier ZrO 2 The mass ratio is 15%, 5%, 5%, 75% to calculate the mass of nickel nitrate, cerium nitrate, calcium nitrate and zirconium nitrate, and calculate the required amount of deionized water with the concentration of zirconium nitrate as 0.2mol / L . The required nickel nitrate, cerium nitrate, calcium nitrate and zirconium nitrate are dissolved in deionized water to form a mixed salt solution. Using NaOH solution as a precipitating agent, prepare an aqueous solution with a NaOH concentration of 2 mol / L.

[0074] (2) Co-precipitation of mixed salt solution: under strong stirring, co-current co-precipitation of mixed salt solution and alkaline precipitant to obtain composit...

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Abstract

The invention discloses a high-dispersion nano-composite catalyst, and a preparation method and applications thereof. The high-dispersion nano-composite catalyst comprises nano-composite with the dimension of 1-10nm, according to the total weight of the composite as standard, the composite comprises ingredients in percentage by weight: 1-20% of reactive metal oxide, 0-20% of basic oxide promoter, 0-20% of oxidized reducing auxiliary, and 40-99% of zirconium dioxide carriers, the weight percentage sum of the ingredients is 100%. The catalyst has the advantages of being high in dry reforming catalytic activity of methane, good in stability, strong in sintering resistance capability, difficult for carbon accumulation and simple in process, and the like, when being used for reaction of the dry reforming of methane through carbon dioxide.

Description

technical field [0001] The invention relates to the design and preparation technology and application of chemical catalysts, in particular, the invention relates to a highly dispersed nanocomposite catalyst and its preparation method and application. Background technique [0002] It is hoped that methane will assume a greater role in future energy systems. In recent years, the exploration and utilization of unconventional natural gas resources, such as shale gas and coalbed methane, which are widely found all over the world, is considered to be one of the important methods to solve the depletion of oil and natural gas resources and meet the growing energy demand in the near future. Currently, the direct use of methane to produce liquid fuels (gasoline and diesel) can only be achieved through energy-intensive steam reforming to obtain synthesis gas. The development of an efficient carbon dioxide reforming of methane process (dry reforming) for large-scale production of synga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J23/83B01J23/42B01J23/89C01B3/40
CPCY02P20/52
Inventor 孙予罕陈庆军张军赵铁均黄巍孙志强王东飞
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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