Loading...
Please wait, while we are loading the content...
Similar Documents
Chemical characterization of diesel fuel obscurants
| Content Provider | United States Department of Energy Office of Scientific and Technical Information (OSTI.GOV) |
|---|---|
| Author | Jenkins, R. A. Wike, J. S. |
| Organization | Oak Ridge National Lab., TN (USA) |
| Abstract | A tiered analytical approach is employed to characterize the diesel fuel aerosol chemically. That is, diesel fuel and/or aerosol is separated by high performance liquid chromatography (HPLC) followed by gas chromatographic (GC) visualization. This approach permits characterization of the fuel as to relative amounts of aromatic and aliphatic constituents and allows a more lucid visualization of the constituents according to compound class. HPLC separation is afforded by isocratic elution with hexane on a 5 ..mu.. silica column. The HPLC chromatogram provides for a gross comparison of differences in various fuels. In order to obtain the aliphatics/aromatics ratio value for a specific fuel, standardization according to refractive index sensitivity is performed and to visualize the individual compound classes, the specific HPLC fractions are collected, reduced in volume, and subjected to high resolution GC separation. Separation is achieved on a 30 m, SE-52 fused silica capillary column. The first fraction eluting from the HPLC consists predominantly of straight- and branched-chain saturated paraffins, the second fraction is predominantly substituted benzene compounds, the third fraction is comprised predominantly of 2-ring aromatics such as alkylated naphthalenes, alkylated biphenyls, and small amounts of aromatic thiophenes and major constituents of the fourth fraction include fluorene, alkylated fluorenes, phenanthrene, and alkylated phenanthrenes. High resolution GC profiles of the liquid phase of the aerosol collected at Smoke Week were compared with those of the aerosol which were being tested in the ORNL study. The following differences were observed: lower boiling constituents and somewhat higher concentrations of the higher boiling hydrocarbons in the fuel collected at Smoke Week. |
| Sponsorship | USDOE |
| Related Links | https://www.osti.gov/biblio/6874316 |
| Page Count | 35 |
| File Format | |
| Language | English |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | PETROLEUM PHYSICAL AND ANALYTICAL CHEMISTRY INORGANIC ORGANIC DIESEL FUELS GAS CHROMATOGRAPHY LIQUID COLUMN CHROMATOGRAPHY AEROSOLS ALKANES ALKENES ALKYNES AROMATICS CHEMICAL ANALYSIS CONDENSED AROMATICS FLUORENE HETEROCYCLIC COMPOUNDS HEXANE ORGANIC SULFUR COMPOUNDS PHENANTHRENE REFRACTIVITY CHROMATOGRAPHY COLLOIDS DISPERSIONS HYDROCARBONS OPTICAL PROPERTIES ORGANIC COMPOUNDS PETROLEUM PRODUCTS PHYSICAL PROPERTIES SEPARATION PROCESSES SOLS 023000 - Petroleum-- Properties & Composition Chemical & Spectral Procedures |
| Content Type | Text |
| Resource Type | Article |
