Corrosion and degradation performance of novel absorbent for CO2 capture in pilot-scale

The corrosion and degradation behavior of new blended amine absorbent specified by Toshiba were studied in the pilot plant under the condition of long-term operation. Three test campaigns of the CO2 capture were completed. One campaign was the base experiment to evaluate the thermal and oxidative degradation and corrosion character of new absorbent. Other two campaigns were operated to evaluate the influence of SO2 on the corrosion and degradation behavior of new absorbent. The results show that the SO2 removal efficiency is almost 100%. After addition of SO2 to simulated flue gas, there will be more serious amine degradation and HSS formation. The greater the SO2 concentration is, the more amine degradation and HSS formation. The point C which is outlet of the heat exchanger (rich liquid side) presents the most serious corrosion. Addition of SO2 plays an important role to form the corrosion protect films. It was difficult to form protect film and easily be destroyed at the presence of SO2 for stainless steel compared with carbon steel. (C) 2010 Published by Elsevier Ltd.