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Method for preparing synthesis gas by reforming natural gas and CO2 dry gas through thermal plasma coupling catalysis

A technology of thermal plasma and plasma, applied in chemical instruments and methods, separation methods, chemical/physical processes, etc., can solve the problems of restricting the long-term operation of catalysts, Ni-based catalysts are easy to deposit carbon, sintering, etc., and achieve metal activity The components are evenly dispersed, the conditions are mild, and the effect of quick start-stop response

Pending Publication Date: 2022-07-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, there are no reports on the successful industrialization of methane dry reforming related technologies at home and abroad. The main reason is that the Ni-based catalyst used in this reaction is prone to carbon deposition and sintering, which greatly limits the long-term operation of the catalyst.

Method used

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  • Method for preparing synthesis gas by reforming natural gas and CO2 dry gas through thermal plasma coupling catalysis
  • Method for preparing synthesis gas by reforming natural gas and CO2 dry gas through thermal plasma coupling catalysis
  • Method for preparing synthesis gas by reforming natural gas and CO2 dry gas through thermal plasma coupling catalysis

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Inconel 601 alloy pipe (inner diameter 10 outer diameter 14, id10od14) was selected, cooked in 15% NaOH solution, deoiled for 1 hour, rinsed with distilled water, dried at room temperature, and then heated at 300 ° C and continuous flow of 200 ml / min. N 2 Treated in the atmosphere for 2h. Then, the temperature is 500 ℃ in high-purity hydrogen atmosphere for 2.5 hours, and the blank metal catalytic reactor is obtained, that is, a blank is obtained. 601 Metal Catalytic Reactor.

Embodiment 2

[0054] Electrochemical Deposition

[0055] GH3030 alloy pipe (inner diameter 15 outer diameter 20, id15od20) was selected, cooked in 15% NaOH solution, deoiled for 1 hour, rinsed with distilled water, dried at room temperature, and then heated at 300 ° C and continuously flowing 200 ml / min of N 2 Treated in the atmosphere for 2h. Formulated with 10% RuCl 3 Add 20ml of 0.1mol / L citric acid to the aqueous solution, adjust the pH to 4.5 with hydrochloric acid, connect a 0.5mm platinum wire as the anode, connect the GH3030 alloy tube as the cathode, and connect the power supply. The distance between the platinum wire and the alloy tube is 2cm. The constant current mode was used, the current was set to 20 mA, and the Ru-deposited GH3030 alloy pipe was obtained after 0.5 hours of deposition. Subsequently, the temperature was 500°C in a high-purity hydrogen atmosphere for 2 hours to form a thin layer of Ru dopant with a thickness of 100 nm on the contact surface of the reactor, and...

Embodiment 3

[0057] Electrochemical Deposition

[0058] GH3030 alloy pipe (inner diameter 12 outer diameter 16, id12od16) was selected, cooked in 15% NaOH solution, deoiled for 1 hour, rinsed with distilled water, dried at room temperature, and then heated at 300°C and continuously flowing 200ml / min of N 2 Treated in the atmosphere for 2h. Formulated with 10% RuCl 3 and 15% FeCl 3 Add 30ml of 0.1mol / L citric acid, adjust pH to 4.5 with hydrochloric acid, connect 0.5mm platinum wire as anode, connect GH3030 alloy tube as cathode, connect power supply, the distance between platinum wire and alloy tube is 2cm. The constant current mode was used, and the current was set to 25 mA. After 0.5 hours of deposition, Ru and Fe deposited GH3030 alloy pipes were obtained. Subsequently, the temperature was 500 °C in a high-purity hydrogen atmosphere for 2 hours to form a thin layer of Ru and Fe dopants with a thickness of 110 nm on the contact surface of the reactor, and then naturally cooled to obta...

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Abstract

The invention relates to a method for preparing synthesis gas by reforming natural gas and CO2 dry gas through thermal plasma coupling catalysis. The process is coupled with thermal plasma heat supply to realize efficient co-conversion of methane and carbon dioxide to generate a mixed gas of CO and H2, namely synthesis gas. According to the invention, the methane conversion rate is 80-96%; the conversion rate of carbon dioxide is 80-98%; carbon monoxide selectivity gt; 99%; cO / H2 is approximately equal to 1; and carbon deposition is low. The device has the electrothermal conversion efficiency gt; and the catalyst has the characteristics of long electrode life, long catalyst life, high methane conversion rate and product selectivity, low carbon deposition, small industrialization difficulty, good process repeatability, safe and reliable operation and the like, and has a wide industrial application prospect.

Description

technical field [0001] The invention relates to a thermal plasma coupling catalytic natural gas and CO 2 Method of dry gas reforming to syngas, the process realizes natural gas and CO 2 Efficient one-step conversion with high electrothermal conversion efficiency, excellent catalyst stability and low carbon deposition. Background technique [0002] Catalytic methane and carbon dioxide reforming (Dry Reforming of Methane, DRM) to syngas (CO and H 2 ) is considered to be the best reaction path. This route can greatly improve the conversion efficiency of methane, and the obtained syngas H with great industrial value 2 / CO≈1, it can be directly used as feed gas for liquid fuels, low-carbon olefins, methanol, dimethyl ether and other oxygen-containing synthesis, etc., and can be easily combined with the related technologies of coal chemical industry, with huge economic and environmental benefits . [0003] As early as 1888, the DRM reaction has attracted the attention of rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/32B01J19/00B01J19/08B01D53/86B01D53/62B01D53/00B01D53/32C01B3/40C25D5/00C25D5/34
CPCB01J19/32B01J19/0053B01J19/088B01D53/8671B01D53/62B01D53/007B01D53/32C01B3/40C25D5/00C25D5/34B01D2257/504B01D2255/802B01D2259/818C01B2203/0238C01B2203/0861C01B2203/1035C01B2203/1041C01B2203/1052C01B2203/1058C01B2203/1076C01B2203/1064C01B2203/107C01B2203/1241Y02P20/52
Inventor 包信和夏维东郭晓光陈仙辉潘秀莲于洪飞
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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