Study On The Removal Of Sulphuretted Hydrogen From Ethylene Glycol By Emulsion Liquid Membranes Technique

The removal of sulphuretted hydrogen from ethylene glycol by using emulsion liquid membranes technique was studied in this paper. Two aspects have been tudied in this experiment, one aspect is the stability of the emulsion liquid and the other aspect is the removal rate of sulfureted hydrogen in dehydration glycol by emulsion liquid membrane.The study on the stability of emulsion liquid mainly includes the kinds and concentration of surfactant, liquid carrier concentration, the liquid paraffin concentration, preparation time, the ratio between oil phase volume and internal phase volume, internal phase concentration and other factors, which effect the stability of the emulsion. In this experiment, when the surfactant concentration is 3%(v/v), the speed of manufacturing emulsion is 10000r/min, the preparation time is 5min, the liquid carrier is 2%(v/v), the ratio between oil phase volume and internal phase volume is 1:1, and the internal phase concentration is 1.0mol/L, we can receive better stability of emulsion. Then, investigate the reason that each factor influence stability of emulsion liquid, worked well a foundation for the further study the emulsion liquid membrane.On the basic of receiving better stability of emulsion, the removal of sulfureted hydrogen in dehydration glycol by emulsion was liquid membrane was studied. The research mainly study the factor of the removal of sulfureted hydrogen, such as the kinds and the concentration of surfactant, liquid carrier concentration, the ratio between oil phase volume and external phase volume, the ratio between emulsion volume and external phase volume, internal phase concentration and primary concentration of sulfureted hydrogen in external phase. By experiment, the optimum conditions of removing sulfureted hydrogen from ethylene glycol by using emulsion liquid membrane have been obtained. The optimum conditions is that the stir speed is 300r/min, the mass transfer time is 30min, the surfactant is 3% (v/v), the ratio between oil phase volume and internal phase volume is 1:1, NaOH is 1mol/L, the liquid paraffin concentration is 2%, ethylene diamine as liquid carrier is 2%, and the ratio between emulsion volume and external phase volume is 1:3. When the optimal condition is taken in the experiment, the removal rate of sulfureted hydrogen in dehydration glycol in which the concentration of sulfureted hydrogen is 100mg/L more than 97%. According to the result, investigate the reason that each factor influences the desulfurization percent.