Commercial fuels must satisfy several physico-chemical properties dependent upon engine type and operational conditions. A prime example is Jet A, a fuel produced for commercial aviation and used all over the World. With a view towards renewable feedstock as a way to decrease the CO<sub>2</sub> footprint associated with air travel, biofuels are receiving an increasing interest. Presently, biofuels are being tested as blends with conventional Jet A fuel, given present engine seal reliance upon aromatic content. Biofuels, even blended, offer additional benefits such as reduced black carbon emission. There is little data on the soot reduction mechanisms for such biofuel blends, in part because of the limited access to full-scale jet engine testing coupled with comprehensive emissions characterization. In this presentation, we provide an overview of black carbon emissions as evaluated by transmission electron microscopy (TEM) analyses of samples collected at the exhaust of a J-85 turbofan engine fueled with Jet A as well as blends of Jet A and Camelina biofuel. Aggregate morphology, primary particle size and their internal nanostructure are analyzed to provide insights into the combustion characteristics. It is hypothesized that fuel-carried aromatics increase aggregate size dependence upon power through turbulent fuel-air mixing.

Characterization of nvPM across decadal length scales: Dependence on biofuel content

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.