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Chemical and physical characterization of aerosols from fast pyrolysis of biomass
National Renewable Energy Laboratory, US.
RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.ORCID iD: 0000-0001-9124-0155
RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.ORCID iD: 0000-0002-1757-9456
National Renewable Energy Laboratory, US.
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2019 (English)In: Journal of Analytical and Applied Pyrolysis, ISSN 0165-2370, E-ISSN 1873-250XArticle in journal (Refereed) In press
Abstract [en]

Biomass fast pyrolysis vapors contain a significant quantity of persistent aerosols, which can impact downstream processing by e.g. fouling of surfaces and deposition on downstream catalysts. In this study, aerosol concentrations and size distributions were measured by an impactor in two pyrolysis systems, a bench-scale fluidized-bed pyrolyzer and a pilot-scale cyclone pyrolyzer. In both units, the mass-based mode aerosol diameter was approximately 1 μm before aerosol collection devices in cooled vapors of 300–370 K but the number-based median was < 0.1 μm. Aerosols < 1 μm were formed and aerosols > 1 μm deposited during cooling of pyrolysis vapors from 620 to 370 K in the fluidized-bed pyrolysis system. The oil fraction collected from the aerosols constituted approximately 40 wt% of the total oils collected in both systems. Compared to the total collected oil, the oil fraction from the aerosols was enriched in lignin-derived components and anhydrosugars and had lower concentrations of low molecular weight cellulose derived oxygenates, such as hydroxyketones. 

Place, publisher, year, edition, pages
Elsevier B.V. , 2019.
Keywords [en]
Aerosols, Biomass, Fast pyrolysis, Size distribution, Fluidized beds, Ketones, Pyrolysis, Storms, Aerosol concentration, Bench-scale fluidized bed, Downstream-processing, Fluidized-bed pyrolysis, Fouling of surfaces, Low molecular weight, Physical characterization
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-38910DOI: 10.1016/j.jaap.2019.04.022Scopus ID: 2-s2.0-85065927023OAI: oai:DiVA.org:ri-38910DiVA, id: diva2:1319809
Note

 Funding details: National Renewable Energy Laboratory; Funding details: Office of Energy Efficiency and Renewable Energy; Funding details: Energimyndigheten; Funding details: U.S. Department of Energy; Funding text 1: This work was authored in part by the National Renewable Energy Laboratory (NREL), operated by Alliance for Sustainable Energy, LLC, for the U.S. Department of Energy (DOE) under Contract No. DE-AC36-08GO28308. Funding was provided by U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Bioenergy Technologies Office and the Swedish Energy Agency . Scott Palmer, Calle Ylipää, Mathias Lundgren, Daniel Svensson and Jimmy Narvesjö are acknowledged for their contributions to the operation of the pyrolyzers, and Renee Happs and Steve Deutch for analytical work. The views expressed in the article do not necessarily represent the views of the DOE or the U.S. Government.

Available from: 2019-06-03 Created: 2019-06-03 Last updated: 2019-06-28Bibliographically approved

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Johansson, Ann-ChristinePettersson, EsbjörnWiinikka, Henrik

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