Blending

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Aston university [1] prepared blends of fast pyrolysis liquid with biodiesel and bio-alcohols, and they patented the concept. Fast pyrolysis oil is immiscible with biodiesel, however, the presence of a bio-alcohol allows the blend to stabilize and form a single homogeneous phase. The most important feature of this achievement is the ability to tailor the blend to the end user requirements if required, e.g. heating value, viscosity or flash point. Three-phase charts (see below) were prepared for each of the bio-alcohols used. A number of homogeneous one phase blends were tested for long term stability, viscosity, pH and density. The University of Twente prepared tertiary blends of pyrolysis oil, alcohol and fossil diesel. The ability to add (bio-)diesel is one way to improve the ignition behaviour of FPBO.

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References

  1. Bioliquids-CHP - Power generation from biomass, Main project results 2011, brochure