Title:
Effects of the Abrasive and Chemical Characteristics of Acidic Pyrolysis Char Suspensions on Process Plant Parts
Author(s):
Ueltzhöffer, S., Klein, H., Nicoleit, T., Neuberger, M., Dahmen, N.
Document(s):
Paper
Poster
Abstract:
At Karlsruhe’s bioliq®-project, dry biomass is converted into synthetic chemicals and fuels, also referred to as biomass to liquids (BtL). The lignocellulosic biomass is first liquefied by fast pyrolysis in distributed regional plants to produce an energy-dense intermediate composed of a viscous bio-oil and a high-energy char powder. Both products are mixed to a suspension – the so called Biosyncrude – to be suitable for long storage periods and more economic transport over long distances. As the pyrolysis condensates have low pH values, the suspensions have not only abrasive but also corrosive effects on the coatings of pumps and tanks. Afterwards, this Biosyncrude is converted into synthesis gas through entrained flow gasifier and then by catalysis to synthetic fuels or platform chemicals. The purpose of this work is to identify the coating material, which withstand the abrasive and corrosive pyrolysis char suspensions the best. For this, two different pyrolysis char suspensions are kept pumping in pipes to detect long term effects on two pumps (eccentric screw pump, rotary lobe pump). The rotary lobe pump has a higher chemical resistance to the slurry, as there are no polymeric materials, which could be effected. On the other side, the eccentric screw pump showed very constant flow characteristic due to the better mechanical pumping properties. After a settling time of two days, both pumps are able to continue pumping the settling Biosyncrudes.
Keywords:
pyrolysis, char, suspension, pumping
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Pyrolysis and other biomass liquefaction technologies
Event:
23rd European Biomass Conference and Exhibition
Session:
3BV.3.7
Pages:
1212 - 1215
ISBN:
978-88-89407-516
Paper DOI:
10.5071/23rdEUBCE2015-3BV.3.7
Price:
FREE
