Effective and inexpensive gas chromatography method for detection of trace level SO₂ in H₂ fuel

【摘要】 Gas chromatography (GC) analysis of sulfer dioxide is challenging because SO 2 is a highly mobile and chemically active molecule. For the conventional GC method with flame photometric detector (FPD) and direct-injection, it is often ineffective particularly when the SO 2 level is as low as on the trace level. In this paper, a modified GC system integrated with an adsorption-desorption device was developed to detect the trace SO 2 impurity in H 2 fuel. Adsorbent GDX-502 is used in the adsorber to adsorb/collect SO 2 from the sample gas and desorb/release it in a concentrated flow so that the conventional GC at downstream could detect it with an acceptable accuracy.更多还原

【Abstract】 Gas chromatography (GC) analysis of sulfer dioxide is challenging because SO 2 is a highly mobile and chemically active molecule. For the conventional GC method with flame photometric detector (FPD) and direct-injection, it is often ineffective particularly when the SO 2 level is as low as on the trace level. In this paper, a modified GC system integrated with an adsorption-desorption device was developed to detect the trace SO 2 impurity in H 2 fuel. Adsorbent GDX-502 is used in the adsorber to adsorb/collect SO 2 from the sample gas and desorb/release it in a concentrated flow so that the conventional GC at downstream could detect it with an acceptable accuracy.更多还原