Title:
Characteristics of the Produced Gas from Gasification of Biomass and Plastics in Bubbling Fluidized Bed Reactor
Author(s):
Tarelho, L.A.C., Santos, M.C., Moura, J.M.O., Almeida, J.P.S., Gomes, H.G.M.F., Matos, M.A.A.
Document(s):
Paper
Abstract:
Gasification is a promising thermochemical route for converting solid waste materials and biomass into valuable gaseous fuels, contributing to energy recovery and waste reduction. This work investigates the gasification of biomass and plastics and the characteristics of the gas produced in a bubbling fluidized bed reactor. It is compared the gas composition resulting from the gasification of residual forest biomass (pine chips) and plastic (low density polyethylene). Various operating conditions were tested, such as the gasifying agent (air, steam, air-steam mixture), the steam-to-biomass ratio (0.4, 0.6, 0.8, 1), and two different temperatures (800, 850 ºC). The H2 concentration ranged from 5.60 to 23.79% vol. in the presence of air, and from 41.17 to 58.68% vol. in steam gasification. The gas yield varied between 0.91 and 4.89.Nm3dry gas·kgbiomass-1, and the lower heating value (LHV) of the dry gas ranged from 2.56 to 15.78.MJ·Nm-3 under the tested conditions, with the highest values observed during steam gasification. The cold gas efficiency (CGE) ranged from 54.6 to 74.3% for biomass and from 59.4 to 99.0% for plastic gasification. Carbon conversion efficiency (CCE) ranged from 63.3 to 96.9% for biomass, and from 78.7 to 92.5% for plastic. The results indicate that plastic gasification generates a gas with higher H2 concentration and improved H2:CO and CO:CO2 molar ratios. For plastic, the steam addition during air-steam gasification enhanced H2 production at all tested steam-to-biomass ratios, whereas for biomass this effect was only observed from a steam-to-biomass mass ratio of 0.6 onwards.
Keywords:
biomass, calorific value, forest residues, gasification, hydrogen
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Gasification for synthesis gas production
Event:
33rd European Biomass Conference and Exhibition
Session:
4BV.5.13
Pages:
761 - 767
ISBN:
978-88-89407-25-7
Paper DOI:
10.5071/33rdEUBCE2025-4BV.5.13
Price:
FREE
