(529g) Effects of Post-Condensation Centrifugal Filtration On Pyrolysis Oil

Authors: 
Varadarajan, A., Mississippi State University
Walters, K. B., Mississippi State University



The effects of post-condensation filtration of the crude pyrolysis oil with relatively high water content and solids content was studied. Tests were performed using a pilot plant-scale centrifuge filtration system. The centrifuge can be used as a three-phase separator [light liquid-heavy liquid-solids] or a two-phase clarifier [liquid-solid].  The testing was performed by varying the parameters such as separation time and displacement time which affects the separation efficiency of the centrifuge. In addition, the impact of increased temperature prior to and during the filtration process was examined.  Effect of feed temperature on the separation efficiency of the centrifuge and the consequent physical and chemical property change on the filtered bio oil was performed. The filtered samples were collected and characterized.  To determine the water content, the Karl Fischer titration method was utilized. Fourier transform infrared (FTIR) spectroscopy was used to determine chemical composition. Gel permeation chromatography was used to determine molecular weight distribution. Particle size distribution in the filtered samples was found using optical microscopy.Parameters were examined for the centrifugal filtration of post-condensation pyrolysis oil to optimize the particulate loading, processing time, and physicochemical stability for downstream processing, including upgrading