Analysis of the Sulfur Compounds in the Exhaust Gases from Two Corn Starch Factories

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  • とうもろこしデンプン製造工程からの排気ガス中の硫黄化合物の検出

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Abstract

The samples for gas chromatographic analyses of the representative lower sulfur compounds such as carbonyl sulfide, hydrogen sulfide, carbon disulfide, methyl mercaptan and sulfur dioxide in the exhaust gases from two corn starch factories, i.e., an unautomated and an automated factories, were prepared by direct cold trap with liquid oxygen and detected by the flame photometric detector.<BR>The detected concentration ranges and average values of the five representative lower sulfur compounds in the exhaust gas from the unautomated factory were as follows; carbonyl sulfide 0.020.03ppm (ave. 0.025ppm), hydrogen sulfide 0.52.1ppm (ave. 1.3ppm), carbon disulfide 0.01ppm (ave. 0.01ppm), methyl mercaptan 0.30.6ppm (ave. 0.45ppm), sulfur dioxide 0.10.3ppm (ave. 0.2ppm), or dimethyl sulfide 0.050.1ppm (ave. 0.075ppm).<BR>On the other hand, those from the automated factory were as follows; carbonyl sulfide 0.02ppm, hydrogen sulfide 0.02ppm, carbon disulfide 0.004ppm, methyl mercaptan 0.01ppm, rather high concentration of sulfur dioxide being 680ppm.

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