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PPS滤布对柴油机排放PM的过滤效率

Keywords: 柴油机,排气微粒,聚苯硫醚针刺毡,过滤效率,深床过滤

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Abstract:

基于柴油机实验台架和颗粒捕集装置,采用聚苯硫醚(PPS)针刺毡滤布过滤柴油机排放的颗粒物(PM)。利用称重法,以Whatman玻璃纤维滤纸为对比滤纸,间接测试了3种PPS滤布的过滤效率;同时实验探索了表面涂覆聚四氟乙烯的PPS滤布的深床过滤时间。实验结果表明,3种滤布在180℃的加热条件下将出现颜色和形态的变化;3种滤布在深床过滤期对PM的平均过滤效率分别为78.8%、76.9%和83.7%;表面涂覆聚四氟乙烯的PPS滤布的深床过滤时间为15~20min,此后其过滤效率可接近100%。

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