In many cases, this condition for viscosity cannot be met only
by preheating pyrolysis oil up to the temperature limit of 80 C
(see Fig. 3). To further reduce the viscosity, the oil can be blended
with another fuel that has good flow properties [44,45]. Here, it is
worth mentioning the experimental work performed by Pander
[46], who tested the combustion of diesel/butanol/pyrolysis oil
mixtures in the same gas turbine as used in this study. Blends with
the percent compositions 50/40/10 and 5/50/45 by mass, with
respective viscosities of 3.4 and 7.0 cP measured at 23 C, were successfully
combusted at partial load without preheating. A third
mixture, with percent composition 0/30/70 and a viscosity of
29 cP at 23 C, failed to combust even after preheating up to 60 C.