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燃煤烟气中共存杂质对膜分离co2性能影响的实验研究

, PP. 100-107

Keywords: co2分离,pdms-psf复合膜,共存气态组分,颗粒物,影响

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Abstract:

？利用自行搭建的膜分离实验台,考察了共存气态组分以及颗粒物对于聚二甲基硅氧烷/聚砜(pdms-psf)复合膜分离co2性能的影响.结果表明,共存气态组分中o2对于膜分离co2有抑制作用;由于so2浓度显著低于co2,在短时间内对膜分离co2没影响;水汽可以促进co2的分离;燃煤飞灰细颗粒在分离膜表面沉积会导致膜性能的恶化.在此基础上,采用模拟湿法烟气脱硫系统装置,进行了燃煤湿法脱硫净烟气环境下的膜分离co2实验;在测试的50h以内,水汽、so2和o2的共同作用导致膜分离性能在前期有一定的提高,随着运行时间的延长,细颗粒物对膜的影响程度加大,导致pdms-psf复合膜的分离性能逐渐恶化,最终导致膜的co2/n2分离因子和co2渗透速率分别下降了17.91%和28.21%.

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