Title:
Tar Removal from Syngas with Natural Zeolites from Tuffs: Wet Scrubbing and Catalytic Cracking
Author(s):
Paolini, V., Petracchini, F., Lo Piano, C., Longo, L., Colantoni, A., Carnevale, M., Gallucci, F.
Document(s):
Paper
Abstract:
Natural zeolites from tuffs were tested for tar removal, during woody biomass gasification. The following compounds were considered: benzene, toluene, ethylbenzene, xylenes, styrene, naphthalene, phenol, cresols and guaiacol. Two different methodologies have been tested: addition of tuffs in a wet scrubber (30 °C) and catalytic cracking (600 °C). Wet scrubbing without zeolites was not efficient towards hydrocarbons (efficiency <5%): the use of natural zeolites allowed to reach an abatement of up to 90% for benzene. Results showed that the efficiency mostly depends on water solubility and specific adsorption capacity, while volatility has a lower impact. A slight improvement was also observed in dephenolisation, especially for low volatile and low water-soluble cresols. Catalytic cracking with natural zeolites resulted in a total (>95% dephenolisation) and a satisfactory degradation of hydrocarbons, depending on the reactivity: efficiencies ranged from 82% (naphthalene) to >95% (styrene). A comparison of technologies showed that wet scrubbing is more affected by linear velocity.
Keywords:
catalytic conversion, gasification, syngas, tar removal
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Gasification for power, CHP and polygeneration
Event:
25th European Biomass Conference and Exhibition
Session:
2CV.3.21
Pages:
784 - 787
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-2CV.3.21
Price:
FREE
