A continuous-flow exposure method to determine degradation of polyphenylene sulfide non-woven bag-filter media by NO2 gas at high temperature
| Autor: | Tomonori Fukasawa, Kazuki Une, Masashi Wada, Kunihiro Fukui, Toru Ishigami, Keiya Ito, Mohammad Irwan Fatkhur Rozy |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
inorganic chemicals
chemistry.chemical_classification Materials science Sulfide General Chemical Engineering education Exhaust gas 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chemical reaction 0104 chemical sciences Cracking chemistry Mechanics of Materials Ultimate tensile strength Degradation (geology) Atomic ratio Fiber Composite material 0210 nano-technology health care economics and organizations |
| Zdroj: | Advanced Powder Technology. 30:2881-2889 |
| ISSN: | 0921-8831 |
| DOI: | 10.1016/j.apt.2019.08.032 |
| Popis: | The degradation behavior of polyphenylene sulfide (PPS) fabric filter media by NO2 gas at high temperatures was investigated in detail with a continuous-flow type exposure method, as specified in ISO16891:2016. An increase in the exposure time to NO2 gas lessened the tensile strength and elongation of the PPS filter media in both machine and transverse directions. These reductions were observed in the transverse direction (TD) more markedly than in the machine direction (MD). Exposure to NO2 gas enhanced the oxidation of sulfur, and introduced new oxygen-containing functional groups (e.g., SO and O S O) into the PPS molecular structure, which reduced the atomic ratio of carbon in the PPS filter media with increasing exposure time. These chemical degradations severely damaged the PPS fiber through cracking, splitting, and formation of protrusions on the surface. Furthermore, assuming that the chemical reaction between PPS and NO2 gas is diffusion-controlled by NO2, a model to estimate the change in the conversion of PPS and the NO2 concentration in the exhaust gas was proposed, based on an unreacted core model. It could successfully reproduce the experimental data. A model to evaluate the change in the tensile strength of the filter media was also proposed, which could express experimental data only in the MD. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect