Title:
Separation and Condensation of Hot Vapours from Oxidative Slow Pyrolysis in Different Liquid Fractions
Author(s):
Buffi, M., Salimbeni, A., Lombardi, G., Lotti, G., Dell'Orco, S., Chiaramonti, D.
Document(s):
Paper
Slide presentation
Abstract:
Slow pyrolysis of biomass represents a renewed opportunity to produce both bioenergy and high value co-products using modern technologies. The present work aims at valorizing the total outputs from slow oxidative pyrolysis: a process that convert the lignocellulosic feedstock without an external heat supply (hence an autothermal pyrolysis process) into char, bio-oil and non-condensable gaseous products. By means of an innovative fractional condensation unit developed in the framework of H2020 BECOOL project, liquid fractions can be collected at different condensing temperature and separated from permanent gases. Therefore, three lignocellulosic feedstocks have been processed in a slow pyrolysis unit of 50 kg per hour as biomass capacity, and part of the pyrogas has been condensed and collected in the innovative condensing system. The system includes two bubbler condensers and an electrostatic precipitator (ESP), located between the first two. The first stage of condensation was maintained above 100 °C to avoid water condensation; the second stage traps the not-collected droplets from the first stage by means of an electrostatic precipitator (ESP); the third cold stage collects water and low boiling compounds at about 0 °C. The main scope of the work was achieved by producing: an organic fraction of pyrolysis oil (with reduced water content) suitable for downstream conversion to advanced biofuels for transports or other chemical compounds of interest; a water fraction enriched in acids and alcohols suitable for downstream conversion to biochemicals.
Keywords:
biofuel, biomass, pyrolysis oil, condensation, biocrude, slow pyrolysis
Topic:
Biomass Conversion to Intermediate Bioenergy Carriers, Sustainable Biofuels and Bio-Based Products
Subtopic:
Pyrolysis
Event:
29th European Biomass Conference and Exhibition
Session:
3CO.3.2
Pages:
755 - 758
ISBN:
978-88-89407-21-9
Paper DOI:
10.5071/29thEUBCE2021-3CO.3.2
Price:
FREE
