Moderate-temperature denitration catalyzing type nanometer heat-storage ceramic honeycomb

Abstract

The invention discloses a moderate-temperature denitration catalyzing type nanometer heat-storage ceramic honeycomb. The moderate-temperature denitration catalyzing type nanometer heat-storage ceramichoneycomb is characterized by mainly comprising nanometer titanium dioxide, methyl methacrylate-butadiene-styrene terpolymer, boron nitride, silicon dioxide, glass fibers, stearic acid, high-molecular polymer fibers and aminocellulose. The ceramic honeycomb is prepared through the processes of catalyst pug kneading, catalyst pug ageing, catalyst pug extrusion molding, catalyst molding, wet greendrying and calcination. The catalytic efficiency of the catalyst is improved, and the use cost of the catalyst is reduced; by adding the stearic acid, molding and demolding of the catalyst are facilitated, and the manufacturing yield of the catalyst is improved. The preparation steps are simple, the reaction conditions are mild in a moderate-temperature environment, and the cost is low.

Description

technical field [0001] The invention relates to a medium-temperature catalyst, in particular to a medium-temperature denitrification catalytic nano-scale thermal storage honeycomb ceramic. Background technique [0002] At present, flue gas denitration technology can be divided into two categories: dry method and wet method. Dry method includes catalytic reduction method (SCR), selective non-catalytic reduction method (SNCR), catalytic decomposition method, adsorption method and low temperature plasma method; wet method Denitrification methods include acid absorption, alkali absorption, chemical oxidation absorption and biological reduction methods. [0003] The traditional vanadium-titanium denitrification catalyst has a narrow activation temperature window (320-400°C), and is susceptible to SO 2 Poisoning, low activity at low temperature, and easy to produce ammonium sulfate, block catalyst holes, air preheater and downstream equipment, cause large pressure drop in the sys...

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Problems solved by technology

[0003] The traditional vanadium-titanium denitrification catalyst has a narrow activation temperature window (320-400°C), and is susceptible to SO 2 Poisoning, low activity at low temperature, and easy to produce ammonium sulfate, which can block the catalyst hole, air preheater and downstream equipment, cause a large pressure drop in the system, increase the electricity cost of the induced draft fan and other unfavorable factors

[0004] However, the existing rare earth-based catalysts do not have heat storage function, and have poor wear resistance, high low value of active temperature, low strength, and short service life; so that the scope of application is greatly limited. Therefore, we urgently need to study a new type of catalyst. to replace the above products

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