Suspensions of Flash Pyrolysed Biomass: Systematic Examination of Stirring
Nicoleit, T., Herzog, A.C., Raffelt, K., Dahmen, N., Sauer, J.
The purpose of Karlsruhe’s bioliq®-project is the conversion of biomass into synthetic chemicals and fuels (also referred to as BtL, biomass to liquids). The lignocellulosic biomass is first liquefied by fast pyrolysis in distributed regional plants to produce an energy-dense intermediate composed of pyrolysis condensates and solid char powder. Both products are mixed to a suspension (the so called bio-slurry or Syncrude) to be suitable for long storage periods and economic transport over long distances. Afterwards, in a large scale industrial facility, the biosyncrude is converted into syngas through entrained flow gasifier and then by catalysis to synfuels or platform chemicals. Regarding to a minimum of energy consumption for avoiding solid sediments in the biosyncrude, two possibilities are being taken into account: either the bio-slurry is continuously slowly stirred, or sedimentation is prevented by short-time stirring followed by an as-long-as-possible resting interval. For the investigated bio-slurries, the experimental results indicates, that it’s more efficient to stir the slurry batch-wise.
pyrolysis oil, char, suspension, stirring, agitating
Biomass Conversion Technologies for Intermediates, Liquid and Gaseous Fuels, Chemicals and Materials
Pyrolysis and other biomass liquefaction technologies
22nd European Biomass Conference and Exhibition
1151 - 1154
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