Method for capturing nitric oxide by means of carboxylic acid anion-functionalized ionic liquid

Abstract

The invention discloses a method for capturing nitric oxide by means of carboxylic acid anion-functionalized ionic liquid. The method is characterized in that carboxylic acid anions with alkalinity are selected as a gas absorbent, and in the nitric oxide capturing process, the absorption pressure ranges from 0.0001 MPa to 0.2 MPa, the absorption temperature ranges from 20 DEG C to 100 DEG C, and the absorption time ranges from 2 hours to 16 hours; absorbed nitric oxide is easy to desorb, wherein the desorption temperature ranges from 60 DEG C to 120 DEG C, and the desorption time ranges from 0.1 hour to 40 hours. Compared with a traditional nitric oxide capturing method, the method has the main advantages that the efficiency and the capacity are high, desorption is easy, the purpose of efficient capturing is achieved through the chemical action between carboxylate radicals and nitric oxide, and the highest absorption capacity that every 1 mol of the ionic liquid absorbs 4.28 mol of nitric oxide is achieved.

Description

technical field [0001] The invention relates to a chemical method, in particular to a method for trapping nitric oxide by using carboxylic acid anion functionalized ionic liquid. Background technique [0002] With the development of science and technology, environmental pollution is becoming more and more serious, among which air pollution will directly affect people's health and the stability of the living environment. As the main component of air pollution, nitrogen oxides (NOx) are one of the chief culprits in the formation of acid rain, photochemical smog, ozone depletion, and damage to ecosystems. Nitrogen oxides (NOx) mainly come from the combustion of fossil fuels, of which NO accounts for more than 90%. In industry, denitration methods are often used to reduce nitrogen oxides (NOx) to nitrogen (N2), mainly including selective catalytic reduction (SCR), selective non-catalytic reduction (SNCR), adsorption (LOTO), Plasma activation method (LPC), etc. Although there ...

AI Technical Summary

Problems solved by technology

Although there are many denitrification methods, each method has its own limitations, such as SCR and SNCR require high technology, high temperature, high cost, and strict equipment; LOTO has high operating costs; LPC denitrification rate is very low

These conditions are issues that must be considered before capturing nitrogen oxides. Therefore, traditional industrial denitrification methods can no longer meet the needs of environmental development. Efficient and economical nitrogen oxide capture methods are an inevitable trend of environmental development.

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