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Effects of NO2 gas concentration on the degradation of polyphenylene sulfide non-woven bag filter at high temperature
Advanced Powder Technology ( IF 5.2 ) Pub Date : 2021-07-31 , DOI: 10.1016/j.apt.2021.07.016
Kunihiro Fukui 1 , Genki Ichiba 1 , Mohammad Irwan Fatkhur Rozy 1 , Keiya Ito 1 , Tomonori Fukasawa 1 , Toru Ishigami 1
Affiliation  

The influence of NO2 concentration and exposure time on the degradation of polyphenylene sulfide (PPS) fabric filter at high temperature was investigated in detail. PPS fiber damage in the filter became more severe with increasing NO2 concentration and exposure time. The elastic modulus of the PPS filter increased rapidly during the initial stage of exposure, and then increased more slowly to reach an almost constant value, nearly independent of NO2 concentration. The tensile strength also decreased significantly during the initial stage, gradually attaining a constant value with increasing exposure time. Higher NO2 concentrations resulted in rapid reducing of the tensile strength. Short exposure time to lower NO2 concentrations caused the oxidation of S atoms in PPS to single bondSOsingle bond and Odouble bondSdouble bondO, whereas oxidation of benzene rings in PPS were induced only with longer exposure times and higher NO2 concentrations. The model proposed in our previous paper accurately expresses the change in PPS conversion and reaction rate for every NO2 concentration. An improved model that successfully estimated the degradation of tensile strength in both the machine direction and transverse direction, regardless of NO2 concentration, was also proposed.



中文翻译:

NO2气体浓度对聚苯硫醚无纺布袋滤器高温降解的影响

详细研究了NO 2浓度和暴露时间对聚苯硫醚(PPS)织物过滤器高温降解的影响。随着NO 2浓度和暴露时间的增加,过滤器中的PPS 纤维损坏变得更加严重。PPS 过滤器的弹性模量在暴露的初始阶段迅速增加,然后增加得更慢,达到几乎恒定的值,几乎与 NO 2浓度无关。拉伸强度在初始阶段也显着下降,随着暴露时间的增加逐渐达到恒定值。较高的NO 2浓度导致拉伸强度迅速降低。减少NO 2 的短暴露时间浓度引起PPS至S原子的氧化单键SO单键和O双键小号双键O,而在PPS苯环的氧化用较长的曝光时间和更高的NO诱导仅2浓度。我们之前论文中提出的模型准确表达了每个 NO 2浓度下PPS 转化率和反应速率的变化。还提出了一种改进的模型,该模型成功地估计了纵向和横向拉伸强度的退化,而不管 NO 2浓度如何。

更新日期:2021-08-27
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