Microwave spectroscopy for pyrolytic bio-slurries

The elemental composition of bio-slurry as intermediate for renewable fuel production in the bioliq® process of the Karlsruhe Institute of Technology, its water content and heating value have to be controlled carefully to regulate the gasification process and to adjust the gasification products. The continuous knowledge of the bioslurry composition is very important for this. Microwave spectroscopic measuring methods in connection with a multivariate data analysis to data evaluation are, however, well suited for solving such measuring tasks. This was the motivation to evaluate the use of microwave spectroscopy techniques for following up the properties of bio-slurry in the bioliq® process. Two different microwave spectroscopic measuring systems were tested in this application. A large number of test measurements was carried out, with good results.