Methane dry reforming reaction under microwave condition and catalyst thereof

A methane dry reforming and catalyst technology, applied in physical/chemical process catalysts, inorganic chemistry, bulk chemical production, etc., can solve the problem of inability to maintain efficient conversion of methane and carbon dioxide for a long time, high operating costs at reaction temperature, energy loss, etc. problem, to achieve the effect of easy and accurate control of preparation conditions, good catalytic activity and stability, and low cost

Active Publication Date: 2021-07-16
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the reaction is a strong endothermic reaction (ΔH = 247kJ / mol), it takes up to 1000°C for reaction conversion
This is bound to cause a huge energy loss, so a way needs to be found to reduce the energy consumption of this reaction
[0004] In related technologies, transition metal catalysts have certain activity in methane dry reforming reaction, and compared with noble metals, transition metals are cheap, but ordinary transition metal catalysts cannot maintain efficient conversion of methane and carbon dioxide for a long time, and their stability is poor , and there is a problem of high operating cost due to high reaction temperature

Method used

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  • Methane dry reforming reaction under microwave condition and catalyst thereof
  • Methane dry reforming reaction under microwave condition and catalyst thereof
  • Methane dry reforming reaction under microwave condition and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of composite metal oxides: Weigh metal salts of zirconium nitrate, calcium nitrate and nickel nitrate according to the formula, dissolve them in distilled water and stir evenly, wherein the ratio of nickel, zirconium and calcium is 2:1:5, Sonicate for 15 minutes, raise the temperature to 50°C, stir for 15 minutes, then raise the temperature to 60°C, stir for 2 hours; add precipitant sodium hydroxide to adjust the pH value to 10 after mixing evenly, stir for 2 hours, let it stand for aging for 2 hours, filter to obtain the filter residue, and The filter residue is dried in an oven at a drying temperature of 120°C, and then the dried filter residue is calcined in a muffle furnace at 700°C for 4 hours to obtain the composite metal oxide Ni / CaZrO 3 .

[0034] The preparation of catalyst: take by weighing 1 gram of said composite metal oxide Ni / CaZrO 3 Carry out mechanical mixing with 5 grams of SiC particles; Then the mixed metal oxide Ni / CaZrO 3 A total of 6 ...

Embodiment 2

[0036]Preparation of composite metal oxides: Weigh metal salts of zirconium nitrate, calcium nitrate, and cobalt nitrate, dissolve them in distilled water and stir evenly. minutes, raise the temperature to 50°C, stir for 15 minutes, then raise the temperature to 60°C, and stir for 2 hours; after mixing evenly, add the precipitating agent sodium hydroxide to adjust the pH value to 10, stir for 2 hours, let stand for aging for 2 hours, filter to obtain the filter residue, put the filter residue in Dry in an oven at a drying temperature of 120°C, and then place the dried filter residue in a muffle furnace at 700°C for 4 hours to obtain the composite metal oxide Co / CaZrO 3 .

[0037] Preparation of catalyst: take 1 gram of the composite metal oxide Co / CaZrO 3 Carry out mechanical mixing with 5 grams of SiC particles; Then the mixed metal oxide Co / CaZrO 3 A total of 6 grams of SiC particles were filled into a quartz tube to form a catalyst bed, and Ar gas was introduced to raise ...

Embodiment 3

[0039] Preparation of composite metal oxides: Weigh metal salts of zirconium nitrate, calcium nitrate, cobalt nitrate, and nickel nitrate and dissolve them in distilled water and stir evenly, wherein (the ratio of the amount of nickel element + cobalt element, zirconium element and calcium element is 2 : 1:5, ultrasonic for 15 minutes, heat up to 50°C, stir for 15min, then heat up to 60°C, stir for 2h; mix well, add precipitant sodium hydroxide to adjust the pH value to 10, stir for 2h, let stand for aging for 2 hours, Filtrate to obtain the filter residue, place the filter residue in an oven to dry at 120°C, and then place the dried filter residue in a muffle furnace at 700°C for calcination for 4 hours to obtain the composite metal oxide Ni-Co / CaZrO 3 .

[0040] Catalyst preparation: weigh 1 gram of the composite metal oxide Ni-Co / CaZrO 3 and 5 grams of SiC particles are mechanically mixed; then the mixed metal oxide Ni-Co / CaZrO 3 A total of 6 grams of SiC particles are ...

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PUM

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Abstract

The invention provides a methane dry reforming reaction under a microwave condition and a catalyst thereof. According to the methane dry reforming reaction, the catalyst comprising a composite metal oxide M / CaZrO3 and SiC is utilized to perform reforming catalysis on CH4 and CO2 under a microwave condition to generate synthesis gas with main products of H2 and CO, and M is at least one metal element of Ni and Co. The methane dry reforming reaction provided by the invention is low in reaction temperature, low in energy consumption and high in conversion rate of methane and carbon dioxide, and the catalyst can keep relatively good activity for a long time in the use process and has good stability.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a methane dry reforming reaction under microwave conditions and a catalyst thereof. Background technique [0002] Methane is a new type of energy that is regarded as a future substitute for petroleum, but it is difficult to convert into high-value chemical products. Methane is also a greenhouse gas, and methane in the atmosphere contributes to climate warming. Another reactant, carbon dioxide, is the most important greenhouse gas. Now the capture, storage and transformation of carbon dioxide have been paid attention to by the whole world. Therefore, the conversion and utilization of methane and carbon dioxide have received more and more attention. [0003] The dry reforming reaction of methane is considered to be a very potential method for future methane conversion and reduction of carbon dioxide content because it can simultaneously convert two greenhouse gases ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224C01B3/40
CPCB01J27/224C01B3/40Y02P20/52
Inventor 徐文涛邓洁周继承李冉
Owner XIANGTAN UNIV
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