초록 ▼

A method of simultaneously removing SO2 and NO from oxygen-containing flue gases resulting from the combustion of carbonaceous material by contacting the flue gas with an aqueous scrubber solution containing an aqueous sulfur dioxide sorbent and an active metal chelating agent which promotes a react

A method of simultaneously removing SO2 and NO from oxygen-containing flue gases resulting from the combustion of carbonaceous material by contacting the flue gas with an aqueous scrubber solution containing an aqueous sulfur dioxide sorbent and an active metal chelating agent which promotes a reaction between dissolved SO2 and dissolved NO to form hydroxylamine N-sulfonates. The hydroxylamine sulfonates are then separated from the scrubber solution which is recycled.

대표청구항 ▼

A method for removing SO2 and NO from flue gas containing oxygen resulting from the combustion of carbonaceous material comprising: preparing an aqueous scrubber solution containing an aqueous sulfur dioxide sorbent and an active metal chelate, the active metal chelate being prepared by mixing a met

A method for removing SO2 and NO from flue gas containing oxygen resulting from the combustion of carbonaceous material comprising: preparing an aqueous scrubber solution containing an aqueous sulfur dioxide sorbent and an active metal chelate, the active metal chelate being prepared by mixing a metal ion as a soluble metal salt in an aqueous solution with a chelating agent in an oxygen-free environment for a period of time sufficient for all the possible coordination sites on the chelating agent to coordinate with the metal ion, thereby forming the active metal chelate, and contacting the oxygen-containing flue gas containing at least 1000 ppm SO2 with the scrubber solution while maintaining the pH of the scrubber solution between 5 and 9, the SO2 dissolving in the solution to form HSO3-, the NO dissolving in the solution to form HNO2, the HNO2 reacting with some of the HSO3-to form hydroxylamine N-sulfonates, thereby removing SO2 and NO from the flue gas.