Deposition of tar from pyrolysis biogas on fixed beds
Tar is the main practical problem in biomass gasification: current gasifiers wastefully cool the gas to ambient temperature for tar removal, and replacement of both cloth filters can account for 50% of running costs. This work aims to remove tar vapours at high temperature by adsorption in a bed of microporous material. A unique laboratory test rig uses an ultrasonic nebulizer to allow tar evaporation into hot simulated biogas, avoiding tar polymerization. By choosing the micropore size to match the molecular diameter of the heavy tar components, tar vapour could be removed at over 500 degrees Celsius; more than 350 degrees above the dewpoint; allowing more efficient operation of a pyrolysis plant.
Bibliographic Reference: EUR 19584 EN (2000) 15 pp.
Availability: Available free of charge from JRC Ispra
Record Number: 200012168 / Last updated on: 2001-06-12
Original language: en
Available languages: en