Title:
Biomass Gasification - A Comparison of Syngas Yield Between Two Downdraft Gasifiers
Author(s):
Carmo-Calado, L., Mota-Panizio, R., Hermoso-Orzáez, M.J., Brito, P.
Document(s):
Paper
Abstract:
In the last few years, a lot of wildfires flared across central and north of Portugal, namely in 2017 which caused many victims. Following these events, the Government released a set of forestry policies promoting the increase of the currently installed forest biomass combustion thermal power plant capacity. The present study conducted a comparison between two gasifiers, as a cleaner alternative and CO2 zero emissions to traditional combustion plants, dealing with forest biomass blends in Portugal's central region. Gasification is currently a promising technology that enables the conversion of biomass into valuable syngas for energy production, achieving better efficiencies and lower environmental impacts when compared with traditional treatments like combustion or incineration. The experiments were carried out to evaluating the process performance and to analyse the properties of product gas at the end, between the two downdraft gasifiers. Results predict that syngas produced in the PP20 gasifier presents values of calorific power in the order of 5 MJ/Nm³, instead, the Prototype presents 3.7 MJ/Nm3. On the other hand, the PP20 gasifier obtainable an E / R (equivalence ratio) close to 0.32 and for the Prototype gasifier, the E/R was close to 0.40. From the above, the difference between both processes regarding the equivalence ratio and the amount of air entering the reactor is not similar, still, the higher concentrations of carbon dioxide and nitrogen presents in the synthesis gas, demonstrates that the Prototype needs more energy (combustion reactions) to maintain the gasification temperature.
Keywords:
biomass, gasification, syngas, downdraft, circular economy
Topic:
Biomass Technologies and Conversion for Bioenergy
Subtopic:
Gasification for synthesis gas production
Event:
28th European Biomass Conference and Exhibition
Session:
2CV.3.23
Pages:
455 - 459
ISBN:
978-88-89407-20-2
Paper DOI:
10.5071/28thEUBCE2020-2CV.3.23
Price:
FREE
