Advantages of compound methyldiethanolamine
(1) It has high selective absorption performance for H2S, and the concentration of hydrogen sulfide in acid gas after solvent regeneration can reach more than 70% (V).
(2) The solvent loss is small. Its vapor pressure is the lowest among several alkanolamines, and its chemical properties are stable, with few solvent degradation products.
(3) The alkalinity is low among several alcohol amines, and the corrosion is light.
(4) The energy consumption of the device is low. The heat of reaction with H2S and CO2 is small, and the high use concentration can reach 40-50%, the solvent circulation volume is reduced, and the consumption of regeneration steam is greatly reduced (in order to stabilize the operation of the desulfurization and regeneration system and reduce the consumption of amine, the composite type A The concentration of the base diethanolamine solvent is 30%).
(5) Because of its good selectivity to H2S, the solvent circulation volume is reduced and the use concentration is high, so the equipment volume is reduced and the investment is saved.
