Treatment method for flue gas denitrification by catalysis of carbon-based metal organic framework type oxide

Abstract

The invention provides a treatment method for flue gas denitrification by catalysis of a carbon-based metal organic framework type oxide. According to the invention, a metal organic framework material is calcined in weak reduction atmosphere to obtain a carbon-based metal organic framework type oxide catalyst, and a redox reaction is carried out on carbon monoxide and flue gases of nitric oxide or nitrogen dioxide at low temperature through the catalyst, so that carbon monoxide and nitric oxide or nitrogen dioxide are respectively converted to carbon dioxide and nitrogen gas, and exhaust gases are recycled through lime water to achieve low-temperature catalysis denitrification and treatment on wastes by using wastes. The denitrification efficiency is 99.9% or above, the nitrogen recovery rate is 95% or above and the exhaust gases reach the existing emission standards.

Description

Technical field [0001] The invention belongs to the field of environmental protection science and relates to a treatment method for carbon-based metal organic framework type oxide catalytic flue gas denitration. Background technique [0002] Flue gas denitration is one of the urgent problems in the field of flue gas environmental protection. At present, the most widely used denitration method in industrialization is NH 3 For reducing agent and V 2 O 5 +WO 3 (MoO 3 ) / TiO 2 It is the selective catalytic reduction of the catalyst, but the active temperature window of its industrial application is 300℃~400℃, and its life is affected by SO 2 In addition, only a few foreign manufacturers have the key synthesis technology for the production of titanium dioxide in the denitration catalyst, resulting in the price of the catalyst accounting for 40% to 60% of the investment in the entire denitration system. Some scholars use metal organic framework materials as catalysts. For example, the p...

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Problems solved by technology

[0004] Moreover, in the current desulfurization and denitrification process, the tail gas discharged from the reaction equipment is firstly treated by a desulfurization device, and then denitrified. The temperature of the tail gas after desulfurization is generally lower than 200°C. For denitrification at a temperature higher than 200°C, it is necessary to heat up the flue gas after desulfurization, which is not conducive to reducing energy consumption in industrialization. Therefore, subsequent denitrification at a temperature lower than 200°C is more suitable for energy saving in industrialization

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