Degradation and Corrosivity of MEA with Oxidation Inhibitors in a Carbon Dioxide Capture Process

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

No Sang Kwak¹  Ji Hyun Lee¹  In Young Lee¹  Jae-Goo Shim¹  Kyung Ryong Jang¹ 

[1] Green Growth Laboratory, KEPCO Research Institute

关键词: CO2 Capture;    Monoethanolamine;    Oxidation Inhibitor;    Thermal Degradation;    Corrosivity;   

DOI  :  10.1252/jcej.11we244

来源: Maruzen Company Ltd

【 摘 要 】

References(13)Cited-By(1)The effect of the oxidation inhibitors, ethylenediaminetetraacetic acid (EDTA), formaldehyde, and Na2SO3, on the oxidative and thermal degradation and the corrosivity of monoethanolamine (MEA) were investigated, and the products of oxidative and thermal degradation of MEA were analyzed. There was no difference in the CO2 absorption/desorption rates between MEA solutions with and without the oxidation inhibitors. The oxidation inhibitors prevented the oxidative degradation of MEA, and the extent of prevention was in the order EDTA≫formaldehyde>Na2SO3. Among the products of oxidative degradation of MEA in the oxidation condition, formate and acetate were the dominant degradation products, and EDTA decreased the amount of products formed to a greater extent than any other inhibitors. Oxidation inhibitors had no effect on the thermal degradation of MEA, and no oxidation products such as anion species of carboxylic acids (glycolate, formate, acetate, and oxalate) and nitrogen products (nitrite and nitrate) were formed under thermal degradation conditions. The corrosion rate of MEA with the inhibitors was in the order Na2SO3

【 授权许可】

Unknown