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High-specific-surface denitration catalyst and preparation and application thereof

A denitration catalyst, high specific surface technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the limitations of the wide application of denitration catalysts, the catalyst activity temperature window is narrow, and the specific surface area of ​​the carrier is low, etc. problem, to achieve good denitration activity, improve nitrogen oxide conversion rate, and high N2 selectivity.

Inactive Publication Date: 2015-12-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing commercial catalysts are limited by the low specific surface area of ​​the carrier and the high cost of additives, which makes the catalyst activity temperature window narrow (300°C-400°C), N 2 Poor selectivity limits the wide application of denitrification catalysts

Method used

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  • High-specific-surface denitration catalyst and preparation and application thereof
  • High-specific-surface denitration catalyst and preparation and application thereof
  • High-specific-surface denitration catalyst and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] Embodiment: the preparation of high specific surface area carrier catalyst

[0033] 1. Dissolution of ammonium metavanadate

[0034] Weigh 0.32143g of ammonium metavanadate and 0.40179g of oxalic acid, add them into 100mL of deionized water; carry out magnetic stirring at 80°C for 10min at a speed of 300r / min, until the ammonium metavanadate is completely dissolved to form solution 1;

[0035] 2. Preparation of titanium dioxide suspension

[0036] Weigh 4.5g high specific surface area (SBET≥300m 2 / g) Titanium dioxide carrier powder, add 90mL deionized water and mix; carry out magnetic stirring at 80°C for 30min at a speed of 300r / min, until a titanium dioxide suspension is formed, namely solution 2.

[0037] 3. Dipping process

[0038] Pour solution 1 into solution 2, add 200 mL of deionized water to dilute at the same time, and perform magnetic stirring at 80° C. for 1 hour at a speed of 300 r / min. Put the stirred solution into an ultrasonic generator and ultrason...

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Abstract

The invention belongs to the field of air pollution control, and particularly relates to a high-specific-surface denitration catalyst and preparation and application thereof. The catalyst is applied to the field of purification of NOx in fixed-source smoke. A high-specific-surface carrier is adopted for the catalyst, ammonium metavanadate serves as an active component raw material, and the active component and the carrier are compounded; specifically, an ultrasonic immersing method is adopted for preparation, and a special heat treatment mode is adopted for sintering; the catalyst can achieve denitration with high efficiency (above 80%) at 200-450 DEG C under experiment conditions and further has high nitrogen selectivity (above 80%). The catalyst has good catalytic activity and can be applied to purification of NOx in fixed-source smoke denitration tail gas.

Description

technical field [0001] The invention belongs to the technical field of nitrogen oxide treatment in environmental protection and air pollution control, and in particular relates to a high specific surface denitrification catalyst and its preparation and application. Background technique [0002] Nitrogen oxide (NOx) is one of the main pollutants in the atmosphere. It is an important precursor that causes acid rain, ozone layer destruction, photochemical smog, and fine particulate matter (PM2.5), which seriously threatens human health and the environment. The Outline of the Twelfth Five-Year Plan for National Economic and Social Development of the People's Republic of China (referred to as the "Twelfth Five-Year Plan") clearly stated that the total emissions of nitrogen oxides in 2015 should be reduced by 10% on the basis of 2010. Target. According to the statistics of the "Research Report on the Technical Scheme for Emission Control of Nitrogen Oxide in Thermal Power Plants ...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J35/10B01D53/86B01D53/56
Inventor 李俊华刘欣李想李柯志王虎
Owner TSINGHUA UNIV
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