Analysis of Gases via Gas Chromatography - Part 2: Sulfur Gases
Sulfur components are widely present in many raw materials used for hydrocarbon processing. The sulfur components are undesirable because they have a strong smell, they cause acidic rain, they poison (expensive) catalysts and reduce polymer yields. Most problematic sulfur gases are hydrogen sulfide (H2S), carbonyl sulfide (COS) and methyl-ethyl mercaptans. These compounds have to be measured at ppb levels. Besides that sulfur gases are volatile, they are also are very reactive. Systems for trace sulfur analysis must be very inert from the sampling device to GC setup to measure reproducible values at ppb levels.