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Water-resistant high-temperature-resistant methane oxidation catalyst and preparation method thereof

A methane oxidation and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low methane catalytic activity and catalyst instability , to achieve high removal efficiency, good stability and high catalytic activity

Inactive Publication Date: 2018-12-14
昆明贵研催化剂有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention discloses a water-resistant and high-temperature-resistant methane oxidation catalyst and a preparation method thereof, in order to overcome the problems of low methane catalytic activity and catalyst instability in the prior art, especially in water-containing atmospheres and high-temperature environments

Method used

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  • Water-resistant high-temperature-resistant methane oxidation catalyst and preparation method thereof
  • Water-resistant high-temperature-resistant methane oxidation catalyst and preparation method thereof
  • Water-resistant high-temperature-resistant methane oxidation catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Weigh 0.78g Ba(CH 3 COO) 2 Prepared as Ba precursor aqueous solution, added to 19.1gAl 2 o 3 (The specific surface area is 195m 2 / g, the pore volume is 0.78ml / g), let it stand at room temperature for 2h, put it in an oven to dry overnight at 120°C, and roast it in a muffle furnace at 600°C for 6h;

[0025](2) Pd(NO 3 ) 2 Move the aqueous solution to the carrier obtained in (1), ultrasonicate for 30 minutes at 80% power in an ultrasonic cleaner, evaporate to dryness in a water bath at 90°C, put it in an oven, dry overnight at 100°C, and bake in a muffle furnace at 600°C for 4 hours .

Embodiment 2

[0027] (1) Weigh 1.03g Ba(CH 3 COO) 2 Prepared as Ba precursor aqueous solution, added to 18.8gAl 2 o 3 (The specific surface area is 195m 2 / g, the pore volume is 0.78ml / g), let it stand at room temperature for 2h, put it in an oven to dry overnight at 120°C, and roast it in a muffle furnace at 600°C for 6h;

[0028] (2) Pd(NO 3 ) 2 Move the aqueous solution to the carrier obtained in (1), ultrasonicate for 30 minutes at 80% power in an ultrasonic cleaner, evaporate to dryness in a water bath at 90°C, put it in an oven, dry overnight at 100°C, and bake in a muffle furnace at 600°C for 4 hours .

[0029] The phase structure characterization of comparative example, embodiment 1, embodiment 2.

[0030] from figure 1 It can be seen that the PdO / BaCO synthesized by the preparation method provided by the present invention 3 / Al 2 o 3 The phase structure of the Ba species in the catalyst is BaCO 3 .

Embodiment 3

[0032] (1) Weigh 1.30g Ba(CH 3 COO) 2 Prepared as Ba precursor aqueous solution, added to 18.7gAl 2 o 3 (The specific surface area is 195m 2 / g, the pore volume is 0.78ml / g), let it stand at room temperature for 2h, put it in an oven to dry overnight at 120°C, and roast it in a muffle furnace at 600°C for 6h;

[0033] (2) Pd(NO 3 ) 2 Move the aqueous solution to the carrier obtained in (1), ultrasonicate for 30 minutes at 80% power in an ultrasonic cleaner, evaporate to dryness in a water bath at 90°C, put it in an oven, dry overnight at 100°C, and bake in a muffle furnace at 600°C for 4 hours .

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Abstract

The invention discloses a water-resistant high-temperature-resistant methane oxidation catalyst and a preparation method thereof. The catalyst is composed of 0.5-5wt% of PdO, 1-10wt% of BaCO3 and 85-98.5wt% of Al2O3, wherein a molar ratio of Al2O3 to BaCO3 is 16.5 to 190.7; a molar ratio of BaCO3 / Al2O3 to PdO is 7.8 to 81.4; a molar ratio of BaCO3 to PdO is 1.25. The preparation method comprises the following steps: (1) dipping a Ba precursor into an Al2O3 material, and performing air roasting to form a BaCO3 / Al2O3 carrier; (2) dipping a Pd precursor onto the carrier prepared in the step (1),performing air drying and roasting, so as to obtain the PdO / BaCO3 / Al2O3 water-resistant high-temperature-resistant methane oxidation catalyst. The methane oxidation catalyst prepared by the method disclosed by the invention has excellent methane catalytic activity and stability in a water-containing atmosphere and a high-temperature environment. The catalyst is applicable to tail gas after-treatment of gas-fueled vehicles and gasoline cars, and can also be used for tail gas purification of burners taking natural gas, coal gas and liquefied petroleum gas as fuel.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalytic materials, and in particular relates to a water-resistant and high-temperature resistant methane oxidation catalyst and a preparation method thereof. Background technique [0002] Facing the increasingly serious air pollution problem and the urgent need for energy structure adjustment, it has become an inevitable trend to choose environmentally friendly and low-carbon renewable fuels. As the only bridge connecting traditional fossil energy and renewable energy, natural gas has become the most potential alternative energy due to its abundant reserves, mature technology and low price. [0003] The main component of natural gas is methane. During the utilization of natural gas resources using natural gas as fuel, it is inevitable to emit a certain concentration of residual methane gas. As the second largest greenhouse gas, methane has a warming potential per unit volume 21 times th...

Claims

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Application Information

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IPC IPC(8): B01J27/232B01J37/02B01D53/86B01D53/72
CPCB01D53/864B01D2257/7025B01J23/002B01J27/232B01J37/0201Y02C20/20
Inventor 杜君臣冯丰王成雄赵德鹏黄卫强杨冬霞李红张爱敏赵云昆
Owner 昆明贵研催化剂有限责任公司
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