Abstract: Based on analyzing the foaming reasons of desulfurization and decarbonization solution for natural gas,the defoaming abilities of different kinds of defoamers are compared and analyzed by means of a foaming pipe experimental device,with foam layer height h and defoaming time t as evaluating indicators.The defoamer DF-2 is selected out as the suitable defoamer.The influences of the dosage amount of defoamer,MDEA concentration,temperature of solution,times of regeneration and concentration of FeS impurity on the defoaming ability of DF-2 defoamer are investigated.The experimental results indicate that DF-2 defoamer can effectively prevent desulfurization and decarbonization solution for natural gas from foaming and its proper addition amount is 0.9 wt‰;DF-2 defoamer after repeated regeneration uses can still make the desulfurization and decarburization solution satisfy the industrial standards such as h<5 cm and t<10 s when the volume fraction of MDEA in solution is 50% and the solution temperature is at 30℃.Results of industrial pilot test shows that DF-2 defoamer can effectively prevent MDEA solution for natural gas from foaming,which will help MDEA solution to apply commercially soon.
石会龙, 刘焕荣, 史德青, 张会敏, 姚媛媛. 天然气脱硫脱碳溶液消泡剂的筛选与应用[J]. 现代化工, 2018, 38(8): 209-212.
SHI Hui-long, LIU Huan-rong, SHI De-qing, ZHANG Hui-min, YAO Yuan-yuan. Screen and application on defoamer for desulfurization and decarbonization solution of natural gas. Modern Chemical Industry, 2018, 38(8): 209-212.