Title:
Comparative Study of Pure and Commercial Biomass During Pyrolysis
Author(s):
García-Cuevas, M.T., Román, S., Montero Puertas, I., Nogales Delgado, S., Arranz Barriga, J.I., Rojas Moreno, C.V.
Document(s):
Paper
Abstract:
Due to the current scarcity of fossil fuels (among other drawbacks), renewable energy sources have recently gained prominence. Thus, nowadays biomass plays a more and more important role. There are many agricultural wastes that can be used as energy sources in Extremadura region, such as Grape pomace and Pyrenean oak. On the other hand, commercial biomass feedstock is widely used, being its composition quite heterogeneous compared to the latter raw materials. During pyrolysis, some pollutants are evolved, some of them with harmful effects over human health and the environment. The aim of this work was to assess some evolved compounds (CO2, NOx, benzene and toluene) during pyrolysis of two different raw materials and a commercial biomass using a thermo gravimetric-mass spectrometry system. Some kinetic parameters were also measured, based on the Coats-Redfern and Criado methods. Therefore, a comparative study between raw materials and commercial biomass was carried out. Regarding TG behaviour, it was found that commercial material started its degradation at lower temperature, indicating a higher reactivity at the first stage of decomposition. Subsequently, both pure biomass materials showed a faster degradation rate for higher conversions. These trends were consistent with kinetics data; for the first and second stages of pyrolysis, the commercial biomass exhibited higher activation energies (60.65 and 82.27, respectively). Concerning the emissions, carbon dioxide associated signal showed a very good agreement with DTG profiles. Also NOx emissions were higher for commercial sample. As far as organic compounds are concerned, there were no significant differences between the samples in study.
Keywords:
biomass, greenhouse gases (GHG), solid biofuels, environmental impact
Topic:
R&D on Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Solid biofuel combustion for small and medium scale applications
Event:
20th European Biomass Conference and Exhibition
Session:
2CV.4.26
Pages:
1336 - 1339
ISBN:
978-88-89407-54-7
Paper DOI:
10.5071/20thEUBCE2012-2CV.4.26
Price:
FREE
