A kind of denitrification catalyst and its preparation method and low temperature denitrification process

Abstract

The invention discloses a denitration catalyst, a preparation method and a low temperature denitration process. Denitration catalyst, based on catalyst weight, including: 75%~94% carbon-containing alumina carrier, 3%~20% Fe 2 O 3 and 3%~20%MnO 2 ; Based on the weight of the carbon-containing alumina carrier, the carbon content is 5wt%-35wt%, preferably 10wt%~30wt%, and the specific surface area is 250-750m 2 / g, the crushing strength is 100‑200N / cm. The denitration catalyst of the invention has larger pore volume, specific surface and mechanical strength, and can be used in low temperature denitration reaction, can effectively remove nitrogen oxides and sulfur oxides in flue gas, and will not cause ammonium hydrogen sulfate to block the bed The problem of the layer prolongs the operation cycle of the device.

Description

technical field

[0001] The invention belongs to the technical field of flue gas denitration, and in particular relates to a denitration catalyst, a preparation method and a denitration process. Background technique

[0002] Nitrogen oxides, collectively referred to as NOx, are one of the main sources of air pollution. The most harmful ones are: NO, NO 2 . The main hazards of NOx are as follows: (1) toxic to the human body; (2) toxic to plants; (3) can form acid rain and acid fog; (4) form photochemical smog with hydrocarbons; (5) destroy the ozone layer .

[0003] Flue gas denitrification refers to the removal of NOx in flue gas. According to the treatment process, it can be divided into wet denitrification and dry denitrification. Mainly include: acid absorption method, alkali absorption method, selective catalytic reduction method, non-selective catalytic reduction method, adsorption method, plasma activation method, etc. Some researchers at home and abroad have also ...

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