[Investigation of FTIR spectra analysis on carbon dioxide absorption with improved amine solution]

Carbon dioxide is a major sort of greenhouse gas as well as important carbon resource. With the developments of industries, emission of carbon dioxide has increased sharply. Hence, controls of carbon dioxide emission and resource transformation have become the hotspot of current study. As a new kind of carbon resource, the fields of CO2 research and application are very extensive. Among those methods, the amine absorption has good qualities of faster absorption rate, higher efficiency and so on, so it has been widely studied. But organic amine have such shortcomings: high consumption of heat energy, strong corrosive and easy oxidated, now pursuer mainly focused on the organic amine modified. The results showed that, when the time the amount of antioxidant 1010 is 0.152, the absorption capacity is 2503.53 mL. the volume of analysis is 982.00 mL, and the absorption rate changes more slowly, by FTIR, Samples of its renewable-OH associating is not apparent that the antioxidant content in 1010, oxidation products of the MEA is acid or less oxidation and antioxidant 1010 product in early to respond fully to form stable non-radical compounds. Therefore, the best dosage of antioxidant 1010 is 0.15%. When the time that the amount of Na2SO3 is 0.15%, the absorption capacity is 2922.88 mL. Analysis of the volume is 723.00 mL, by FTIR, which reveals the oxidation products of the MEA is amide -C=O which in alkaline solution can be transiting into primary amine, and be easy absorbing CO2. Comparing the antioxygenic proerty of antioxidant 1010 with Na2SO3, from the absorption rate, the amount of absorption , Na2SO3's antioxidant properties is superior than antioxidant 1010; by infrared spectral analysis, 1010/20% MEA solution's oxidation products is the acid, Na2SO3/20% MEA solutions, the oxidation product is amide, amide solution is advantaged for absorbing CO2, So Na2SO3's antioxidant properties is superior than antioxidant 1010.