Degradation of N-methyldiethanolamine desulfurization solution at high temperature and by sulfur dioxide, carbon dioxide, and oxygen blends

作者：Liu, Yucheng^*; Zhang, Bo; Chen, Mingyan; Ma, Lili; Zhang, Yingqi

来源：International Journal of Greenhouse Gas Control, 2016, 44: 175-184.

DOI：10.1016/j.ijggc.2015.11.019

• N-methyldiethanolamine
• Degradation
• Degradation rate
• Degradation products
• Foaming

The effects of O-2, O-2, CO2, and heating on the degradation and physical properties of 50 wt% MDEA solutions were evaluated systematically in a stirred reactor. The results showed that the degradation rate decreased in the order MDEA-O-2 > MDEA-SO2 > MDEA-CO2, indicating the detrimental influence of the presence of O-2 in the solvent. The results also showed that the degradation rate presented an upward trend with the increase of temperature. In addition, the degradation under different conditions caused the decrease of the pH value and surface tension of the solution. Also, a higher degradation rate resulted in a higher foaming tendency and foam stability, especially for MDEA-O-2. Furthermore, the degradation products of MDEA-O-2 all promoted foaming behavior and foam stability. Among these products, carboxylic acid had more influence on foaming than the other products.

• 出版日期2016-1
• 单位西南石油大学