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Study explores using low blend level of tire pyrolysis liquid with diesel

A new study examines the combustion and emissions performance of a tire pyrolysis liquid (TPL) fuel produced in a continuous auger reactor on pilot scale blended at 5 vol.% (5TPL) with commercial diesel fuel (100D) in a 4-cylinder, 4-stroke, turbocharged, intercooled, 2.0-liter Nissan diesel automotive engine with common-rail injection system.

In a paper in the journal Fuel, the researchers report that both brake specific fuel consumption and brake thermal efficiency seemed to deteriorate with the TPL blend at low engine load, while at higher engine load the values of these parameters were almost equal for both fuels.

Similarly, total hydrocarbon (THC) emissions followed the same pattern—higher for 5TPL at low engine load but similar for both fuels when the engine load increased.

NOx emissions were higher for 5TPL than those for 100D in three operating modes (U10, EU8 and EU16), while no significant differences were found in the other mode (U9).

5TPL led to higher smoke opacity respect to those found for 100D in all operating modes. Combustion duration was slightly longer for 5TPL than 100D.


  • Juan Daniel Martínez, José Rodríguez-Fernández, Jesús Sánchez-Valdepeñas, Ramón Murillo, Tomás García (2013) Performance and emissions of an automotive diesel engine using a tire pyrolysis liquid blend, Fuel doi: 10.1016/j.fuel.2013.07.051



Perhaps it is better used in continuous combustion applications, such as heating oil blends.

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