Chemical Composition of Exhaust Particles from Gas Turbine Engines.

摘要

A program was conducted to chemically characterize particulate emissions from a current technology,high population,gas turbine engine. Attention was focused on polynuclear aromatic compounds,phenols,nitrosamines and total organics. Polynuclear aromatic hydrocarbons (PAH) were determined by HPLC,GC/MS and NMR techniques. Phenols and nitrosamines were isolated and then measured by gas chromatographic methods utilizing flame ionization detection and nitrogen detection. Total organics were determined by a backflush chromatographic procedure. The particulate matter was collected using a high capacity pumping system incorporating 293mm diameter Teflon filters through which was passed up to 43cu m of exhaust gas. Extraction of the organic matter was performed in a Soxhlet extractor using hexane. The engine was operated at idle,approach,climb and take-off power settings with low sulfur (0.007%S) and high sulfur (0.25%S) fuels. Most of the PAH were small 3-to-4fused ring species. No nitrosamines were found and except in a few cases,at low levels,no phenols. PAH and total organic levels decreased with increasing power setting and were more concentrated in the exhaust from the low sulfur fuel. Less than 1% of the organic matter emitted from the engine was adsorbed on the particulate matter.