Composition of Clusters Formed by Plasma Discharge in Simulated Engine Exhaust Ford Research Laboratory

Format:

Conference/Event

Author/Creator:

Hoard, John, author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (2000-10-16 : Baltimore, Maryland, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2000

Summary:

Previously reported experiments revealed the presence of a small number of clusters or very small particles in the effluent of a nonthermal plasma reactor when treating a simulated engine exhaust mixture. These clusters are smaller than 7 nm. The quantity of clusters is orders of magnitude smaller than the particulate diesel or gasoline engine exhaust typically contains. In this report, we describe further experiments designed to determine the chemical composition of the clusters.Clusters were collected on the surface of a silicon substrate by exposing it to the effluent flow for extended time periods. The resulting deposits were analyzed by high mass resolution SIMS and by XPS. The SIMS analysis reveals NH4+, CH6N+, SO-, SO2-, SO3- and HSO4- ions. XPS reveals the presence of N and S at binding energies consistent with that of ammonium sulfate. Although it is not possible to precisely determine the compounds present on the surface, the following conclusions can be drawn:Particles were not found to be present downstream of a catalyst substrate when it was used in conjunction with the plasma discharge

Notes:

Vendor supplied data

Publisher Number:

2000-01-2967

Access Restriction:

Restricted for use by site license