酸性废气脱硫工艺中N^-甲基二乙醇胺降解反应产物的研究

The Methyldiethanolamine Degradation Products in Desulphurization Process for Acid Waste Gas

对用MDEA从甲醇酸性尾气中回收H2S装置中出现的胺液降解的现象进行了研究。通过气相色谱-质谱对降解产物结构进行了表征，提出了MDEA的降解反应机理。结果表明MDEA的降解主要为MDEA与CO2和H2O的反应。由于甲醇、氧和HCN等的存在，更加剧了MDEA降解发生，文中提出了相应的抑制措施。

The structure of degradation product of amine solutions, which existed in the devices of H2S recovery from the methanol acid waste gas was studied. According to GC-MS, the mechanism of the MDEA degradation reaction was proposed. The results showed that the reaction of carbon dioxide, water with MDEA accelerates the degradation of MDEA because of the existence of methanol、oxygen and hydrocyanic acid etc. Some inhibitory was measured to prevent the degradation of MDEA.