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Preparation method and application of supported catalyst for methane dry reforming

A supported catalyst, methane dry reforming technology, applied in the direction of chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of CO and H2 ratio deviation, deactivation, etc., to achieve high Stability, the effect of simple preparation method

Active Publication Date: 2018-11-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the patent reports have produced methane dry reforming catalysts with good dispersion, but in the long-term evaluation of catalysts, deactivation will still occur, and it will also cause CO and H 2 The ratio deviates significantly from 1

Method used

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  • Preparation method and application of supported catalyst for methane dry reforming
  • Preparation method and application of supported catalyst for methane dry reforming
  • Preparation method and application of supported catalyst for methane dry reforming

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Weigh 5.82g of Ni(NO 3 ) 2 ·6H 2 O, 3.02g of glycine and 1.65g of NH 4 NO 3 It was dissolved in a certain amount of aqueous solution and stirred continuously at room temperature for 12 hours. Subsequently, 13.5 g of silicon dioxide was quickly added in an equal-volume preparation method and stirred evenly. It was dried under vacuum at 80°C, then dried in an oven at 120°C for 5 hours, and then calcined in a muffle furnace at 500°C for 5 hours to obtain catalyst powder. Finally, the 40-60 mesh particles were pressed, crushed and screened for activity evaluation, and the prepared catalyst was marked as catalyst A, wherein the mass fraction of NiO was 10.2%. The transmission electron microscope image (JEOL, JEM 2100) of the catalyst structure can be seen figure 1 , it can be seen that the particle size of the catalyst prepared by the combustion method is small, and the average particle size is only 5 nanometers.

Embodiment 2

[0035] Weigh 5.98g of Ni(NO 3 ) 2 ·6H 2 O, the ruthenium nitrate of 0.11g, the glycine of 3.14g and the NH of 1.78g 4 NO 3 It was dissolved in a certain amount of aqueous solution and stirred continuously at room temperature for 12 hours. Subsequently, 13.9 g of aluminum oxide was quickly added in an equal-volume preparation method, and stirred evenly. It was dried under vacuum at 80°C, then dried in an oven at 120°C for 5 hours, and then calcined in a muffle furnace at 500°C for 5 hours to obtain catalyst powder. Finally, the 40-60 mesh particles were pressed, crushed and screened for activity evaluation. The prepared catalyst was marked as catalyst B, in which the mass fraction of NiO was 10.6%, and the mass fraction of Ru was 0.2%.

Embodiment 3

[0037] Weigh 7.23g of palladium nitrate, 5.14g of urea and 2.12g of NH 4 NO 3 It was dissolved in a certain amount of aqueous solution and stirred continuously at room temperature for 12 hours. Subsequently, 14.2 g of aluminum oxide was quickly added in an equal-volume preparation method and stirred evenly. It was dried under vacuum at 100°C, then dried in an oven at 180°C for 12 hours, and then calcined in a muffle furnace at 700°C for 5 hours to obtain catalyst powder. Finally, the 40-60 mesh particles were pressed, crushed and screened for activity evaluation. The prepared catalyst was marked as Catalyst C, and the mass fraction of PdO was 9.8%.

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Abstract

The invention discloses a preparation method of a supported catalyst for methane dry reforming. The method comprises the following steps: preparing an aqueous solution rom an active metal soluble salt, an assistant soluble salt and a soluble fuel, mixing the aqueous solution with a carrier by an isopyknic impregnation technology, and performing drying and calcination to prepare the target catalyst. The catalyst prepared through the method has excellent catalysis activity, anti-carbon formation property and anti-sintering property when applied to a methane dry reforming reaction. The activity of the catalyst still can reach a thermodynamic equilibrium value after a long-time reaction at a high space velocity, and the H2 / CO ratio of produced syngas (H2 / CO) is close to a theoretical value of1. The preparation method of the catalyst is simple, and the catalyst has a good application prospect.

Description

technical field [0001] The invention relates to a catalyst for preparing synthesis gas by dry reforming of methane, a preparation method and application thereof, and belongs to the field of natural gas chemical industry. Background technique [0002] Carbon dioxide and methane are not only typical greenhouse gases, but also important carbon resources, which can be converted into synthesis gas (CO and H 2 ), which is called methane carbon dioxide reforming or dry reforming. Compared with the traditional steam reforming of methane, carbon dioxide reforming of methane can reduce energy consumption and alleviate the pressure of greenhouse gas emission reduction, so it has attracted much attention. The methane wet reforming reaction (CH 4 +H 2 O=3H 2 +CO), can generate CO and H 2 of syngas, but due to H 2 / CO>3 is not conducive to the synthesis of long-chain hydrocarbons in the Fischer-Tropsch reaction; while methane dry reforming reaction CH 4 +CO 2 =2H 2 +2CO is CH ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/89B01J23/44B01J23/889B01J23/86B82Y30/00B82Y40/00C01B3/40
CPCB01J23/002B01J23/44B01J23/755B01J23/866B01J23/8892B01J23/892B01J2523/00B82Y30/00B82Y40/00C01B3/40C01B2203/0238C01B2203/1058C01B2203/1064C01B2203/1241B01J2523/31B01J2523/821B01J2523/847B01J2523/41B01J2523/72B01J2523/67Y02P20/52
Inventor 刘小浩胥月兵徐艳姜枫刘冰
Owner JIANGNAN UNIV
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