Page 251 - Lignocellulosic Biomass to Liquid Biofuels

Syngas fermentation to bioethanol 207

Figure 6.6 Wood Ljungdahl pathway of acetogens and their metabolic end pro-
ducts [46].

[6,21,23,24,47,48]. The most common unwanted syngas impurities are
as follows:
Dust/particles: Dusts are fine grained particles. It could be organic or
inorganic. It is primarily affected by the quality of the biomass-based syn-
gas. During the thermal conversion of biomass the diameter of the parti-
cles decreases by increasing gasification temperature, though the reduction
of particle-size is significantly affected by elutriation, in particular when