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Integral fuel gas burning catalyst and process for preparing the same

A gas combustion and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of burners that cannot process gas appliances, failure to reach effective heat flow, and high cost of catalysts , to achieve low pressure drop, good low temperature performance and anti-aging performance, high activity effect

Inactive Publication Date: 2006-11-22
SICHUAN TIANJIAN CATALYTIC COMBUSTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to CH 4 The volume concentration is low, and the range of effective heat flow cannot be reached, and the cost of the catalyst is high due to the noble metal component
The catalysts disclosed in the above two Chinese patent applications are all granular catalysts, and obviously cannot be directly used to process burners of gas appliances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The matrix uses a pore density of 46 pores / cm 2 The monolithic cordierite honeycomb ceramics, the composite catalytic functional components and coating additives in the catalyst coating account for 70% and 30% of the weight of the entire catalyst coating respectively. The composite catalytic functional component includes three catalytic functional components; the first catalytic functional component accounts for 30% of the weight of the entire catalyst functional component, and its carrier is γ-Al 2 o 3 , the active component is ferric oxide, and the auxiliary agent is lanthanum oxide, which respectively account for 85%, 10% and 5% of the weight of the catalytic functional component, and the precursors are all nitrates; the second catalytic functional component Accounting for 30% of the weight of the entire catalytic functional component, the carrier is θ-Al 2 o 3 , the active component is manganese oxide, and the auxiliary agent is zirconia, which account for 90%, 7...

Embodiment 2

[0045] The matrix uses a pore density of 31 pores / cm 2 The monolithic metal honeycomb body, the composite catalytic functional component and the coating aid group in the catalyst coating accounted for 78% and 22% of the weight of the entire catalyst coating, in which the composite catalytic functional component included four different catalytic functions Components: The first catalytic functional component accounts for 20% of the weight of the entire catalytic functional component, and the carrier is γ-Al 2 o 3 , the active component is manganese oxide, and the auxiliary agent is zirconia, which account for 90%, 8.0% and 2.0% of the catalytic functional components respectively, and the precursors are all nitrates; the second catalytic functional component accounts for the entire catalytic functional component Component 20%, carrier is CeO 2 —ZrO 2 (where CeO 2 30%, ZrO 2 accounted for 70%), the active component is iron oxide, and the auxiliary agent is cerium oxide, which...

Embodiment 3

[0048] The matrix uses a pore density of 54 pores / cm 2 The ceramic honeycomb body, the composite catalytic functional components and coating additives in the catalytic coating accounted for 83% and 17% of the weight of the entire catalytic coating, and the composite catalytic functional components included five different catalytic functional components: A catalytic functional component accounts for 22% of the entire catalytic component, and the carrier is γ-Al 2 o 3 , the active component is Fe 2 o 3 , the auxiliary agent is lanthanum oxide, accounting for 80%, 14% and 6.0% of the catalytic functional components respectively, and the precursors are all nitrates; the second catalytic functional component accounts for 18% of the entire catalytic functional component, and the carrier for CeO 2 —ZrO 2 (where CeO 2 30%, ZrO 2 accounted for 70%), the active component is cobalt oxide, and the auxiliary agent is strontium oxide, accounting for 73%, 20% and 7.0% of the catalytic...

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PUM

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Abstract

The invention discloses an integral gas combustion catalyst and a preparation method thereof. The substrate of the catalyst is a monolithic ceramic honeycomb body or metal honeycomb body. The catalyst coating coated on the surface of the substrate is composed of catalytic functional components and coating additives. The catalytic functional components contain at least three different catalytic functions Composite catalytic functional components of components, each of which contains mutually adapted carriers, active components and active component additives, and is prepared through corresponding precursor treatment. After the catalyst coating is applied to the surface of the substrate, it must be dried and calcined. The catalyst of the present invention is suitable for operation under high-concentration gas and high space velocity conditions, has high activity and high stability, and can be directly used to make burners for household gas appliances that use natural gas, petroleum liquefied gas, and coal gas as fuels, and has high High thermal efficiency and low pollutant emission.

Description

1. Technical field [0001] The invention relates to an integral catalyst capable of improving the combustion efficiency of combustible gases such as natural gas, liquefied petroleum gas and coal gas, and reducing pollutant emissions and a preparation method thereof. 2. Background technology [0002] So far, most of the energy used by humans still comes from the spontaneous combustion of combustible substances, which is also called flame combustion. In flame combustion, due to the initiation of free radicals in the gas phase, the products in the excited state of the electron are generated, and energy is released in the form of visible light during the transition back to the ground state. This part of energy cannot be used and lost. At the same time, due to the initiation of free radicals in the gas phase, the N in the air 2 Will participate in the reaction to generate NO x , In addition, there are HC and CO produced by incomplete combustion. Therefore, flame combustion has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/74B01J23/32B01J23/76B01J37/025
Inventor 陈耀强龚茂初郑林周世蓉李云胡安明
Owner SICHUAN TIANJIAN CATALYTIC COMBUSTION
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