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Catalytic method for methane dry reforming

A methane dry reforming, methane technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of limited conversion rate and product selectivity of methane and carbon dioxide , side reaction products and other problems, to achieve excellent thermal stability, improve selectivity, improve selectivity and yield effects

Pending Publication Date: 2022-02-08
NANKAI UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a catalytic method for methane dry reforming, which overcomes the fact that various side reaction products are easily produced in the existing low-temperature plasma technology to realize methane dry reforming reaction, even if it is combined with a conventional supported metal catalyst The use of methane and carbon dioxide conversion and product selectivity also raises limited issues

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  • Catalytic method for methane dry reforming

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preparation example Construction

[0031] The preparation method of described nickel-based boron nitride catalyst comprises the steps:

[0032] 1) putting boron nitride into isopropanol for ultrasonication, and then drying it to obtain a thin boron nitride carrier;

[0033] 2) mixing the metallic nickel salt solution with the dried flake boron nitride, and then drying it to obtain the dried mixture;

[0034] 3) Calcining the dried mixture in air to obtain the nickel-based boron nitride catalyst.

[0035] In step 1), the mixing method is to put boron nitride in the isopropanol solution; the mass volume ratio of the boron nitride to the isopropanol solution is 1: (50-1000), and the ultrasonic time is 12h-36h,

[0036] In step 2), the mixing method is to drop the metal nickel salt solution onto the boron nitride carrier; the mass ratio of nickel nitrate and boron nitride carrier in the metal nickel salt solution is (0.002-0.04): 1 , the drying temperature is 80°C-110°C, and the drying time is 8-24h;

[0037] I...

Embodiment 1

[0040] Mix methane, carbon dioxide and argon to obtain a mixed raw material gas (the volume ratio of methane, carbon dioxide and argon in the mixed raw material gas is 1:1:1), and mix the mixed raw material gas for 720h -1The volume space velocity passes into DBD low-temperature plasma reactor (the discharge area of ​​described DBD low-temperature plasma reactor is equipped with 1g nickel-based boron nitride catalyst, and the active component of described nickel-base boron nitride catalyst is metallic nickel, The carrier is boron nitride, and the metal nickel in the nickel-based boron nitride catalyst is 4% by mass in the catalyst) for catalytic reaction, the reaction temperature is 25°C, the reaction pressure is normal pressure, and the mixing The feed gas passes through the dielectric barrier discharge region at a flow rate of 60ml / min. The power of the DBD low-temperature plasma reactor is 21.8w, and the discharge frequency is 7.4kHz to prepare the product synthesis gas (hyd...

Embodiment 2

[0048] Mix methane, carbon dioxide and argon to obtain a mixed raw material gas (the volume ratio of methane, carbon dioxide and argon in the mixed raw material gas is 1:1:1), and mix the mixed raw material gas for 720h -1 The volume space velocity passes into DBD low-temperature plasma reactor (the discharge area of ​​described DBD low-temperature plasma reactor is equipped with 1g nickel-based boron nitride catalyst, and the active component of described nickel-base boron nitride catalyst is metallic nickel, The carrier is boron nitride, and the nickel-based boron nitride catalyst (heavy metal nickel in the catalyst is 4% by mass) carries out a catalytic reaction, the reaction temperature is 35° C., and the reaction pressure is 0.1 MPa. The reaction raw material The residence time of gas in the dielectric barrier discharge area is 8.5s, the power of the DBD low-temperature plasma reactor is 29.4w, the discharge frequency is 7.4kHz, and the prepared catalytic products synthesi...

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Abstract

The invention discloses a catalytic method for methane dry reforming, which comprises the following steps of: introducing mixed raw material gas of methane, carbon dioxide and inert gas into a low-temperature plasma reactor filled with a catalyst, and carrying out catalytic reaction in the presence of the catalyst to obtain synthetic gas of hydrogen and carbon monoxide, the catalyst being a nickel-based boron nitride catalyst. According to the catalytic method for methane dry reforming provided by the invention, the nickel-based boron nitride catalyst is applied to the reaction of plasma catalytic methane dry reforming for the first time, so that efficient directional synthesis gas conversion of methane and carbon dioxide under low-temperature and normal-pressure conditions is realized, and the yield and selectivity of synthetic gas and the conversion rate of methane and carbon dioxide can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of catalysis for methane dry reforming, in particular to a catalytic method for methane dry reforming. Background technique [0002] Methane (CH 4 ) and carbon dioxide (CO 2 ) as a typical greenhouse gas, the continuous increase of its emissions is the root cause of global warming, leading to the deterioration of the global climate and posing a great threat to the living environment of human beings. CH 4 and CO 2 China's anthropogenic emissions accounted for 76% and 16% of global anthropogenic emissions, respectively. Therefore, the CH 4 and CO 2 Conversion into valuable chemicals has broad application prospects. for CH 4 or CO 2 The conversion utilizes different catalytic reactions, including dry reforming of methane (DRM), hydrogenation of carbon dioxide to methane and methanol and reverse water gas shift. Among them, since DRM can simultaneously convert two greenhouse gases into syngas (H 2 and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/40B01J27/24B01J23/755
CPCC01B3/40B01J27/24B01J23/755C01B2203/0238C01B2203/1058C01B2203/1082C01B2203/0861Y02P20/52
Inventor 李原玲于宏兵刘丽娜戴静
Owner NANKAI UNIV
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