| 摘要 |
PURPOSE: A method for treating a gas is provided to efficiently and safely neutralize SO3 and mist of sulfuric acid contained in flue gas which are generated by combustion of sulfur contained fuels for facilities such as boilers. CONSTITUTION: The method for treating a gas containing SO3 comprises the step of adding a mixture of sodium bicarbonate powder having an average particle diameter of 20 microns or less and an anti-caking agent for sodium bicarbonate into a SO3 contained gas having a temperature of 60 deg.C or more in an amount of 0.1 to 5 wt.% based on the sodium bicarbonate powder so as to neutralize SO3 in the gas, wherein sodium bicarbonate is added into a gas in an amount of 0.5 to 5 equivalents based on SO3, the anti-caking agent is particulate having an average particle diameter of 0.005 to 0.1 microns, and the anti-caking agent is silica.
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