Integrally-extruded honeycomb catalyst for selective catalytic reduction (SCR) smoke denitration and preparation process of catalyst

Abstract

The invention discloses an integrally-extruded honeycomb catalyst for selective catalytic reduction (SCR) smoke denitration. The catalyst consists of the following active ingredients: 65 to 80 percent of titanium dioxide, 5 to 15 percent of ferrous sulfate, 5 to 15 percent of tungsten trioxide, 1 to 4.5 percent of vanadium pentoxide and 0.05 to 0.5 percent of lanthanum nitrate. The catalyst has the advantages of high mechanical strength, wear resistance, long service life and low cost, and the catalyst is easy to form; particularly FeSO4 is added, so that a good catalyzing effect is achieved, and a synergistic effect of FeSO4 and Ti-V-W active ingredients is also achieved; because a La element is added, structural phase transition from an anatase to a rutile is greatly restrained, a phase transition temperature is obviously increased, the catalyst can be calcined at a temperature of 800 DEG C, and the catalyst of an anatase ontology is obtained; and moreover, the catalyst has a good denitration effect, is wide in applicable temperature range, and can help to achieve a desorption efficiency of 60 to 90 percent at the temperature of between 180 DEG C and 450 DEG C.

Description

technical field [0001] The invention relates to a catalyst for air pollution control, in particular to an integral extruded honeycomb catalyst for SCR flue gas denitrification and a preparation process thereof, belonging to the field of air pollution control catalysts. Background technique [0002] my country is the world's largest coal producer and consumer. Coal still accounts for a large proportion of my country's energy structure. The coal-based energy consumption structure is the most important reason for my country's increasingly serious nitrogen oxide pollution. Nitrogen oxide (NOx) pollution is becoming more and more serious, and environmental problems such as acid rain, photochemical smog, and greenhouse effect caused by it are becoming more and more serious. Flue gas denitrification has become a key issue to be solved urgently in the country's "Twelfth Five-Year Plan". Over the years, coal has accounted for more than 75% of my country's total energy consumption. I...

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Problems solved by technology

my country's flue gas desulfurization technology mainly relies on the introduction of foreign technology, but the imported technology has prominent problems such as high cost of technology use, difficulty in mastering core technology, and poor upgradeability. In particular, the catalyst used is expensive and has not been localized, which seriously restricts my country's NOx control. carry out