Effect of Corrosion Inhibitors on Oxidative Degradation of MEA in Carbon Dioxide Capture

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

In-Young Lee¹  Ji Hyun Lee¹  Jun-Han Kim¹  Jae-Goo Shim¹  Kyung Ryong Jang¹ 

[1] Green Growth Laboratory, KEPCO R&D Institute

关键词: CO2 Capture;    Monoethanolamine;    Oxidative Degradation;    Corrosion;    Inhibitor;   

DOI  :  10.1252/jcej.10we289

来源: Maruzen Company Ltd

【 摘 要 】

References(11)Cited-By(1)The effect of corrosion inhibitors such as CuCO3, CuSO4, and Na2SO3 on the oxidation of MEA has been investigated. The products of oxidative degradation of MEA were analyzed with or without the corrosion inhibitors. The corrosion inhibitor effects on the oxidative degradation of MEA and the extent of oxidative degradation is in the order CuCO3 > CuSO4 > MEA without inhibitors > Na2SO3. There was no difference in absorption/desorption rates among MEA solutions with and without the corrosion inhibitors. Among the products of the oxidative degradation of MEA, formate and acetate were dominant degradation products and nitrites and nitrates were also present in large amounts. The corrosion inhibitors CuCO3 and CuSO4 acted as catalysts for oxidative degradation of MEA. CuCO3 and CuSO4 influenced the formation of carboxylic acids (formate, acetate, and oxalate), but did not influence the formation of nitrogen products (nitrites and nitrates). Na2SO3 slightly inhibited the oxidative degradation of MEA and did not produce more oxidation products than CuCO3 and CuSO4.

【 授权许可】

Unknown