High activity and carbon deposition resistant catalyst for reforming of dry methane gas and preparation method thereof

A carbon-deposited methane and dry gas reforming technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of agglomeration and Problems such as stacking, reduced utilization of active metals, and reduced specific surface area of ​​materials can achieve the effects of improving raw material utilization and composite material yield, reducing carbon deposition rate, and reducing use

Active Publication Date: 2019-07-05
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the methane dry gas reforming reaction, the operating conditions are often carried out at relatively high temperatures (>600°C). After high-temperature treatment, the above-mentioned sheet-shaped hydroxide materials are prone to agglomeration and stacking, and lose their original sheet structure. During the process, the specific surface area of ​​the material decreases, the utilization rate of the active metal decreases, and the catalyst is deactivated.

Method used

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  • High activity and carbon deposition resistant catalyst for reforming of dry methane gas and preparation method thereof
  • High activity and carbon deposition resistant catalyst for reforming of dry methane gas and preparation method thereof
  • High activity and carbon deposition resistant catalyst for reforming of dry methane gas and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] Preparation of Ni-Mg-Al nanosheets: Take 5.0mmol Ni(NO 3 ) 2 ·6H 2 O, 40.0mmol of Mg(NO 3 ) 2 ·6H 2 O and 15.0mmol of Al(NO 3 ) 3 ·9H 2 O, dissolved in 50mL deionized water to make solution A. Prepare another 200mL NaOH solution with a concentration of 0.13mol / L, which is recorded as solution B. Place solution B in a 30°C water bath, add solution A to it under vigorous stirring, and continue to stir and react for 60 minutes. After filtration and washing, the precipitate was re-dispersed in 200 mL of deionized water, put into a hydrothermal kettle, and hydrothermally heated at 100°C for 16 hours to obtain a nanoflaky sol with a solid content of 4.0 mg / mL. Confirmed by XRD results ( figure 1 ), the material has a nano-sheet structure, denoted as NMA.

[0035] Preparation of coated Ni-Mg-Al@SiO 2 Composite material: Measure 90 mL of nano flake sol, add 7 mL of ammonia water, and 1.30 mL of tetraethyl orthosilicate (TEOS), and stir and react in a 30°C water bath for 16 h. Af...

Embodiment 2

[0038] Example 1 was repeated, but the amount of TEOS added was 0.65 mL to obtain a composite material NMAS-2 with a sheet-layer coating structure with a coating layer thickness of 2 nm. After reductive activation, NMAS-2-R, a high-activity, anti-carbon methane dry gas reforming catalyst is obtained.

Embodiment 3

[0040] Example 1 was repeated, but the amount of TEOS added was 2.60 mL to obtain a composite material NMAS-3 with a sheet-layer coating structure with a coating layer thickness of 7 nm. After reductive activation, a high-activity, anti-carbon methane dry gas reforming catalyst NMAS-3-R is obtained.

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Abstract

The invention discloses a high activity and carbon deposition resistant catalyst for the reforming of dry methane gas and a preparation method thereof. Specifically, stable sol with a nano laminated structure is prepared through a precipitation method; then a second component is in-situ coated; and after drying, burning, and reduction-activating, the catalyst with a nano laminated coated structureis obtained. The catalyst has high activity in the reforming reactions of dry methane gas, has a strong carbon deposition resistant performance, can continuously play a catalyst role at a temperatureof 400 to 900 DEG C, and is resistant to inactivation. The raw materials are easily available, the technology is simple, and the catalyst can also be applied to reforming of methane water steam, carbon dioxide assisted dehydrogenation of ethane and propane, and water-gas shift reaction.

Description

Technical field [0001] The invention belongs to the field of methane dry gas reforming, and specifically relates to a high-activity and anti-carbon deposition methane dry gas reforming catalyst and a preparation method thereof. Background technique [0002] Methane dry gas reforming to syngas (CH 4 +CO 2 =CO+H 2 ) Is an important process for the utilization of natural gas. This process can simultaneously realize the conversion and utilization of two main greenhouse gases, and the obtained synthesis gas contains CO / H 2 The ratio is close to 1, which is conducive to the synthesis of oxygenated compounds or the funding process to obtain high value-added products such as hydrocarbons, which has important environmental protection and economic value. The catalyst is the key to realizing methane dry gas reforming, and the Group VIII transition metal catalyst is the main active component. Among them, the supported precious metals Ru and Rh have excellent reactivity, but due to the high p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/02C01B3/40
CPCB01J23/78B01J35/0046B01J35/023C01B3/40C01B2203/0233Y02P20/52
Inventor 陆安慧贺雷
Owner DALIAN UNIV OF TECH
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