Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Toghiani, Hossein

Committee Member

George, E. Clifford

Committee Member

Molen, Marshall G.

Committee Member

Toghiani, K. Rebecca

Date of Degree

5-5-2007

Document Type

Graduate Thesis - Open Access

Major

Chemical Engineering

Degree Name

Master of Science

College

James Worth Bagley College of Engineering

Department

Dave C. Swalm School of Chemical Engineering

Abstract

The addition of Tier 2 standards by United States Environmental Protection Agency (EPA) has increased focus on light-duty vehicle emissions. In this study, a diesel-electric hybrid vehicle was used for testing under the Challenge X program. The diesel engine was powered by a 20% soy-based biodiesel - 80% diesel blend, and the electric motor received its energy from a 330 volt Nickle Metal Hydride battery pack. The diesel engine, notorious for high emissions of nitrogen oxides (NOx) and particulate matter (PM), requires aftertreatment of these emissions to achieve Tier 2 EPA compliance. The primary focus of this thesis is use of a urea injection selective catalytic reduction (SCR) system to reduce NOx emissions. Also, a diesel particulate filter (DPF) was employed for PM reduction purposes. Significant decreases in both NOx and PM emissions were achieved.

URI

https://hdl.handle.net/11668/15218

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