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Determination of Sulfur Trioxide in Engine Exhaust
| Content Provider | CiteSeerX |
|---|---|
| Author | Dean, R. |
| Abstract | Sulfur trioxide in the exhaust gas of an internal combustion engine is removed and concentrated by absorption in a solution of 80 % isopropyl alcohol, which quantitatively absorbs it and inhibits the oxidation of any sulfur dioxide which may be absorbed. The absorbed sulfur trioxide (sulfuric acid) is determined by an absorption titration by-using barium chloride as the titrant and thorin as the indicator. The sulfur dioxide content of the exhaust is measured continuously by means of a DuPont Model 411 ultra--violet photoanalyzer. As the automobile manufacturers are using oxidation catalysts on a portion of their 1975 car production, it became necessary to consider the effect of these catalysts on emissions other than just carbon monoxide and hydrocarbons. One such emission is sulfur dioxide. Sulfur dioxide is produced in the combustion cycle of the engine by the oxidation of the sulfur which is present in the gasoline. Since one of the important uses of noble metal oxidation catalysts in the chemical industry is the production of sulfuric acid by oxidizing sulfur dioxide to sulfur trioxide, a serious emission product from catalyst-equipped vehicles may be sulfuric acid. A large number of methods for analyzing sulfur trioxide emissions in stack gases is available in the literature. However, most of these methods suffer interferences from materials which are commonly found in internal combustion engine exhausts, such as ammonia and nitrogen oxides. One method, |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Sulfur Trioxide Emission Nitrogen Oxide Engine Exhaust Absorbed Sulfur Trioxide Internal Combustion Engine Stack Gas Catalyst-equipped Vehicle Isopropyl Alcohol Sulfur Trioxide Sulfuric Acid Important Us Sulfur Dioxide Internal Combustion Engine Exhaust Oxidation Catalyst Chemical Industry Noble Metal Oxidation Catalyst Ultra Violet Photoanalyzer Sulfur Dioxide Content Serious Emission Product Automobile Manufacturer Car Production Combustion Cycle Exhaust Gas Dupont Model Absorption Titration By-using Barium Chloride |
| Content Type | Text |
