Theses and Dissertations


A Comparative Study of Diesel Ignited Methane and Propane Dual Fuel Low Temperature Combustion in a Single Cylinder Research Engine

Issuing Body

Mississippi State University


Krishnan, Sundar R.

Committee Member

Srinivasan, Kalyan K.

Committee Member

Hodge, Keith

Date of Degree


Document Type

Graduate Thesis - Open Access

Degree Name

Master of Science


James Worth Bagley College of Engineering


The objective of this thesis is to investigate and compare the performance and emissions characteristics of diesel-ignited methane and diesel-ignited propane dual fuel LTC in a single cylinder research engine (SCRE) at a constant engine load of 5.1 bar net indicated mean effective pressure (IMEP) and at a constant engine speed of 1500 RPM. Percentage of energy substitution of propane or methane (0 - 90 percent), diesel injection timing (SOI: 355 CAD – 280 CAD), rail pressure (200 bar – 1300 bar) and boost pressure (1.1 bar – 1.8 bar) were varied to quantify their impact on engine performance and engine-out ISNOx, ISHC, ISCO, and smoke emissions. Advancing SOI to 310 CAD and beyond yielded simultaneous ISNOx and smoke emissions. A rail pressure of 500 bar was the optimal one for both fueling combinations while increasing boost pressure over 1.2 bar had a very little effect on ISNOx and smoke emissions.


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