Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Low-concentration methane catalytic combustion catalyst and preparation method of the same

A methane catalytic combustion and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Poor stability, improved dispersion and stability, and improved low-temperature ignition starting performance

Inactive Publication Date: 2013-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF12 Cites 44 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, the hydrothermal stability of low-concentration methane catalytic combustion catalysts has not been well resolved, and there are few relevant data on the stability.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-concentration methane catalytic combustion catalyst and preparation method of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Catalyst A: 0.47%Pd / 6.2%MgO / Al 2 O 3

[0027] (1) Weigh 16.10g MgCl 2 ·6H 2 O, add deionized water to dissolve to 20mL;

[0028] (2) Add 38g Al 2 o 3 The particles are immersed in the aqueous solution prepared in step (1), dried at 120°C for 10 hours, and calcined at 900°C for 3 hours to obtain the catalyst precursor;

[0029] (3) Immerse the catalyst precursor prepared in step (2) into 20 mL of Pd(NO3) containing 9.6 mg / mL Pd 2 solution, dried at 120°C for 10 hours, and calcined at 200°C for 2 hours to obtain the desired oxidized noble metal catalyst;

[0030] (4) The catalyst prepared in step (3) was washed with 10% H 2 -90%N 2 The mixed gas is reduced at 400°C for 3 hours to obtain a noble metal single-state catalyst, and the components of the catalyst are 0.47%Pd / 6.2%MgO / Al 2 o 3 .

Embodiment 2

[0031] Embodiment 2: Catalyst B: 0.96%Pd / 8.9%La 2 O 3 / Al 2 O 3

[0032] (1) Weigh 7.50g La(NO 3 ) 3 ·6H 2 O, add deionized water to dissolve to 25mL;

[0033] (2) 48g Al 2 o 3 The particles are immersed in the aqueous solution prepared in step (1), dried at 105°C for 15 hours, and calcined at 1000°C for 3 hours to obtain the catalyst precursor;

[0034] (3) Immerse the catalyst precursor prepared in step (2) into 26.4 mL of Pd(NO 3 ) 2 solution, dried at 105°C for 15 hours, and calcined at 250°C for 3 hours to obtain the desired oxidized noble metal catalyst;

[0035] (4) The catalyst prepared in step (3) was mixed with 20% H 2 -80%N 2 The mixed gas is reduced at 420°C for 2.5 hours to obtain a noble metal single-state catalyst, and the components of the catalyst are 0.96%Pd / 8.9%La 2 o 3 / Al 2 o 3 .

Embodiment 3

[0036] Embodiment 3: Catalyst C: 0.39%Pd / 9.6%CoO / Al 2 O 3

[0037] (1) Weigh 11.89g Co(NO 3 ) 3 ·6H 2 O, add deionized water to dissolve to 15mL;

[0038] (2) 28.8g Al 2 o 3 The particles are immersed in the aqueous solution prepared in step (1), dried at 110°C for 30 hours, and calcined at 1000°C for 3 hours to obtain the catalyst precursor;

[0039] (3) Immerse the catalyst precursor prepared in step (2) into 15.9 mL of PdCl containing 7.8 mg / mL Pd 2 solution, dried at 110°C for 30 hours, and after calcination at 210°C for 2 hours, washed the Cl in the catalyst with deionized water - , and then dried at 110°C for 30 hours to obtain the desired oxidized noble metal catalyst;

[0040] (4) The catalyst prepared in step (3) was washed with 10% H 2 -90%N 2 The mixed gas is reduced at 400°C for 3 hours to obtain a noble metal single-state catalyst, and the components of the catalyst are 0.39%Pd / 9.6%CoO / Al 2 o 3 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a low-concentration methane catalytic combustion catalyst and a preparation method of the low-concentration methane catalytic combustion catalyst. The low-concentration methane catalytic combustion catalyst comprises a catalytic activity component, a catalyst carrier of Al2O3 and a metal oxide co-carrier. One kind or several kinds of the combination of platinum family precious metal of palladium (Pd), platinum (Pt), ruthenium (Ru), iridium (Ir) and rhodium (Rh) are used as the catalytic activity component; at least one kind in metal oxide of magnesium (Mg), lanthanum (La), ferrum (Fe), manganese (Mn), nickel (Ni), cobalt (Co), chromium (Cr) and calcium (Ca) is used as the metal oxide co-carrier. Arbitrary one kind of the methods of an impregnation method, a homogeneous precipitation method, a co-precipitation method and a pyrolytic method is used for preparing a catalyst precursor. Then the catalyst is formed after being filtered, washed, dried, roasted, formed, roasted again and restored. The low-concentration methane catalytic combustion catalyst and the preparation method of the low-concentration methane catalytic combustion catalyst have the advantages of being capable of stably combusting under the lean-burn, oxygen-enriched and high-water-vapor conditions, high in activity, long in service life and the like.

Description

technical field [0001] The invention belongs to the field of combustion catalysts for methane and low-carbon hydrocarbons, in particular to a catalyst for catalytic combustion of low-concentration methane and a preparation method thereof. Background technique [0002] Coal bed methane is a kind of hydrocarbon gas attached to coal seams. If it is not used rationally, it will not only cause a huge waste of energy, but also lead to a significant greenhouse effect. During coal mining, three types of coalbed methane are mainly released: CMM (Coal Mine Methane), CBM (Coalbed Methane), and VAM (Ventilation Air Methane). Among them, the mine ventilation gas (VAM), which accounts for 70% of the methane content of coalbed methane, due to the large gas flow rate (100-500m 3 / s), low methane concentration (0.2-1.0vol%) and instability, there is no mature utilization technology yet. Although some companies at home and abroad have developed the indirect utilization technology of ventila...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/00C10L10/00B01J23/44B01J23/63B01J23/89B01J23/652B01J23/58
Inventor 王树东刘莹王胜孙天军高典楠张纯希
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com