Biomass fast pyrolysis energy balance of a 1kg/h test rig


The present paper offers a methodological approach towards the estimation and definition of enthalpies constituting an energy balance around a fast pyrolysis experiment conducted in a laboratory scale fluid bed with a capacity of 1 kg/ h. Pure N2 was used as fluidization medium at atmospheric pressure and the operating temperature (∼500°C) was adjusted with electrical resistors. The biomass feedstock type that was used was beech wood. An effort was made to achieve a satisfying 92.5% retrieval of products (dry basis mass balance) with the differences mainly attributed to loss of some bio-oil constituents into the quenching medium, ISOPAR™. The chemical enthalpy recovery for bio-oil, char and permanent gases is calculated 64.6%, 14.5% and 7.1%, respectively. All the energy losses from the experimental unit into the environment, namely the pyrolyser, cooling unit etc. are discussed and compared to the heat of fast pyrolysis that was calculated at 1123.5 kJ per kg of beech wood. This only represents 2.4% of the biomass total enthalpy or 6.5% its HHV basis. For the estimation of some important thermo-physical properties such as heat capacity and density, it was found that using data based on the identified compounds from the GC/MS analysis is very close to the reference values despite the small fraction of the bio-oil components detected. The methodology and results can help as a starting point for the proper design of fast pyrolysis experiments, pilot and/or industrial scale plants.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences > Energy and Bioproducts Research Institute (EBRI)
Additional Information: Creative commons by attribution (CC-BY) Funding: FP7/2007-2013 (grant 284498 BRISK)
Uncontrolled Keywords: beech wood,bio-oil,energy balance,fast pyrolysis,Engineering(all),Condensed Matter Physics
Publication ISSN: 2146-1511
Last Modified: 22 Apr 2024 07:12
Date Deposited: 21 Dec 2015 09:10
Full Text Link: http://ijoticat ... view/5000147483
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2015-12
Authors: Atsonios, K.
Panopoulos, K.D.
Bridgwater, A.V. (ORCID Profile 0000-0001-7362-6205)
Kakaras, E.



Version: Published Version

License: Creative Commons Attribution

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