
224 Principles of Sustainable Energy Systems
© 2008 Taylor & Francis Group, LLC
Based on Table 4.12, we can estimate the biomass to bio-oil energy efciency using
Equation 4.29:
Efficiency
MJ/kg
-Biooil
=
=
15 8
68 0
.[ ]
(4.29)
Production of pyrolysis oils and its coproducts involves several steps [56] that are
illustrated in Figure 4.7. Lignocellulosic feedstock, such as wood or agricultural resi-
dues, is milled to a ne powder to promote rapid reaction. The particles are augured
into the pyrolysis reactor where they are rapidly heated and converted into condens-
able vapors, liquid aerosols, noncondensable gases, and charcoal. ...