METHOD FOR MEASURING CARBON DIOXIDE CONCENTRATION IN ORGANIC CARBON DIOXIDE ABSORBING SOLUTION IN PRESSURIZED STATE

摘要

PROBLEM TO BE SOLVED: To provide a method for accurately and simply measuring a concentration of CO₂ in organic CO₂ absorbing solution which absorbs CO₂ and is in a pressurized state in a CO₂ separation device for separating CO₂ from gas by bringing the gas containing CO₂ into contact with the organic CO₂ absorbing solution at pressure of 1 MPa or more.;SOLUTION: After organic CO₂ absorbing solution in a pressurized state is sampled, a portion of the sampled organic CO₂ absorbing solution is mixed with ammonia water and pressure of the remaining portion of the sampled organic CO₂ absorbing solution is reduced to normal pressure to allow the same to evaporate. Then, a dilution rate of the sampled organic CO₂ absorbing solution is calculated by comparing a concentration of organic carbon in the organic CO₂ absorbing solution with the pressure thereof reduced to the normal pressure with the concentration of the organic carbon in the organic CO₂ absorbing solution mixed with the ammonia water. The concentration of inorganic carbon in the sampled organic CO₂ absorbing solution is corrected with the dilution rate.;COPYRIGHT: (C)2014,JPO&INPIT