Development of an Automated Diesel Engine Test Stand for Evaluating Combustion and Exhaust Emission Characteristics of Nanoemulsion Biofuels

Project Overview

Project Type: Graduate Student
Funds awarded in 2009: $9,942.00
Projected End Date: 12/31/2011
Grant Recipient: University of Missouri
Region: North Central
State: Missouri
Graduate Student:
Faculty Advisor:
Dr. Ali Koc
University of Missouri

Annual Reports

Information Products


  • Agronomic: canola, corn, rapeseed, soybeans


  • Energy: bioenergy and biofuels, energy use


    Using biodiesel in diesel engines has several positive effects on reducing the exhaust emissions. However, biodiesel containing fuel blends tend to increase the NOx emissions from diesel engines compared to petroleum diesel. The objective of this study was to determine the effects of biodiesel and surfactant concentrations of a water-biodiesel-diesel nanoemulsion fuel on engine performance and exhaust emissions of a 4-cylinder diesel engine. Biodiesel nanoemulsions were prepared based on statistical experimental design methodology. An instrumented 4-cylinder diesel engine test stand was developed and used for the engine performance and exhaust emissions of the biodiesel nanoemulsions. The results showed that biodiesel nanoemulsions reduced the NOx emissions compared to biodiesel-diesel blends at the same biodiesel concentrations. Increasing the surfactant concentration at constant water and biodiesel concentrations produced higher engine powers. Emulsified biodiesel reduced the NOx emissions and exhaust temperature but increased the brake specific fuel consumption and CO emissions.

    Project objectives:

    The objective of this study was to evaluate the performance and exhaust emissions (NOx, CO, CO?, soot opacity) of a 4-cylinder diesel engine fueled with water-biodiesel-diesel emulsions at various biodiesel and surfactant concentrations.

    Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture or SARE.