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Pettersson, EsbjörnORCID iD iconorcid.org/0000-0002-1757-9456
Publications (10 of 23) Show all publications
Iisa, K., Johansson, A.-C., Pettersson, E., French, R., Orton, K. & Wiinikka, H. (2019). Chemical and physical characterization of aerosols from fast pyrolysis of biomass. Journal of Analytical and Applied Pyrolysis
Open this publication in new window or tab >>Chemical and physical characterization of aerosols from fast pyrolysis of biomass
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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
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
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-38910 (URN)10.1016/j.jaap.2019.04.022 (DOI)2-s2.0-85065927023 (Scopus ID)
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
Bräck, T., Weiland, F., Pettersson, E., Hedman, H. & Sepman, A. (2018). Replace fossil gas in industrial burners with renewable biogas. In: Hytönen Eemeli, Vepsäläinen Jessica (Ed.), The 8th Nordic Wood Biorefinery Conference: NWBC 2018: proceedings. Paper presented at The 8th Nordic Wood Biorefinery Conference held in Helsinki, Finland, 22-25 Oct. (pp. 73-73). Espoo: VTT Technical Research Centre of Finland
Open this publication in new window or tab >>Replace fossil gas in industrial burners with renewable biogas
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2018 (English)In: The 8th Nordic Wood Biorefinery Conference: NWBC 2018: proceedings / [ed] Hytönen Eemeli, Vepsäläinen Jessica, Espoo: VTT Technical Research Centre of Finland , 2018, p. 73-73Conference paper, Oral presentation with published abstract (Refereed)
Place, publisher, year, edition, pages
Espoo: VTT Technical Research Centre of Finland, 2018
Series
VTT Technology, ISSN 2242-1211 ; 340
Keywords
industrial burner, fossil gas, renewable gas
National Category
Energy Engineering
Identifiers
urn:nbn:se:ri:diva-36368 (URN)978-951-38-8672-1 (ISBN)
Conference
The 8th Nordic Wood Biorefinery Conference held in Helsinki, Finland, 22-25 Oct.
Available from: 2018-11-20 Created: 2018-11-20 Last updated: 2019-06-24Bibliographically approved
Wiinikka, H., Wennebro, J., Gullberg, M., Pettersson, E. & Weiland, F. (2017). Pure oxygen fixed-bed gasification of wood under high temperature (>1000 °C) freeboard conditions. Applied Energy, 191, 153-162
Open this publication in new window or tab >>Pure oxygen fixed-bed gasification of wood under high temperature (>1000 °C) freeboard conditions
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2017 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 191, p. 153-162Article in journal (Refereed) Published
Abstract [en]

In this paper, the performance (syngas composition, syngas production and gasification efficiency) of an 18 kW atmospheric fixed bed oxygen blown gasifier (FOXBG) with a high temperature (&gt;1000 °C) freeboard section was compared to that of a pressurized (2–7 bar) oxygen blown entrained flow biomass gasifier (PEBG). Stem wood in the form of pellets (FOXBG) or powder (PEBG) was used as fuel. The experimentally obtained syngas compositions, syngas production rates and gasification efficiencies for both gasification technologies were similar. Efficient generation of high quality syngas (in terms of high concentration and yield of CO and H2 and low concentration and yield of CH4, heavier hydrocarbons and soot) is therefore not specific to the PEBG. Instead, efficient gasification seems to be linked to high reactor process temperatures that can also be obtained in a FOXBG. The high quality of the syngas produced in the FOXBG from fuel pellets is promising, as it suggests that in the future, much of the cost associated with milling the fuel to a fine powder will be avoidable. Furthermore, it is also implied that feedstocks that are nearly impossible to pulverize can be used as un-pretreated fuels in the FOXBG.

Keywords
Biomass, Entrained flow, Fixed bed, Gasification, Oxygen blown
National Category
Chemical Sciences
Identifiers
urn:nbn:se:ri:diva-29180 (URN)10.1016/j.apenergy.2017.01.054 (DOI)2-s2.0-85012306104 (Scopus ID)
Available from: 2017-04-03 Created: 2017-04-03 Last updated: 2019-06-24Bibliographically approved
Simonsson, J., Bladh, H., Gullberg, M., Pettersson, E., Sepman, A., Ögren, Y., . . . Bengtsson, P.-E. (2016). Soot Concentrations in an Atmospheric Entrained Flow Gasifier with Variations in Fuel and Burner Configuration Studied Using Diode-Laser Extinction Measurements. Energy & Fuels, 30(3), 2174-2186
Open this publication in new window or tab >>Soot Concentrations in an Atmospheric Entrained Flow Gasifier with Variations in Fuel and Burner Configuration Studied Using Diode-Laser Extinction Measurements
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2016 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 30, no 3, p. 2174-2186Article in journal (Refereed) Published
Abstract [en]

Soot concentration measurements were performed using diode-laser extinction in an atmospheric air-blown entrained flow gasifier at two vertical levels. The gasifier was operated at different air-fuel equivalence ratios and with variations in fuel and burner configurations. Two fuels were investigated: wood powder and peat powder. These were burned using two burner configurations, one giving a rotating flow inside the gasifier (swirl), and one where the fuel and air were injected parallel with the gasifier axis (jet). The diode-laser measurements were performed at the wavelength 808 nm from which the soot concentrations were estimated, and additionally at 450 nm in order to gain insight into the spectral dependence of the extinction to estimate measurement quality. Additional diagnostic techniques were used, such as an electrical low-pressure impactor (ELPI) for soot size distributions and gas chromatography for species concentration measurements. The results show that wood powder produces higher soot concentrations than peat powder, especially at lower air-fuel equivalence ratios. Furthermore, the burner configuration had in general much less impact than the choice of fuel on the soot concentration.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2016
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-332 (URN)10.1021/acs.energyfuels.5b02561 (DOI)
Available from: 2016-06-17 Created: 2016-06-17 Last updated: 2019-06-24Bibliographically approved
Wiinikka, H., Weiland, F., Pettersson, E., Öhrman, O. .. .., Carlsson, P. & Stjernberg, J. (2014). Characterisation of submicron particles produced during oxygen blown entrained flow gasification of biomass (ed.). Combustion and Flame, 161(7), 1923-1934
Open this publication in new window or tab >>Characterisation of submicron particles produced during oxygen blown entrained flow gasification of biomass
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2014 (English)In: Combustion and Flame, ISSN 0010-2180, E-ISSN 1556-2921, Vol. 161, no 7, p. 1923-1934Article in journal (Refereed) Published
Abstract [en]

In this paper submicron particles sampled after the quench during 200kW, 2bar(a) pressurised, oxygen blown gasification of three biomass fuels, pure stem wood of pine and spruce, bark from spruce and a bark mixture, have been characterised with respect to particle size distribution with a low pressure cascade impactor. The particles were also characterised for morphology and elemental composition by a combination of scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) and high resolution transmission electron microscopy/energy dispersive spectroscopy/selected area electron diffraction pattern (HRTEM/EDS/SAED) techniques. The resulting particle concentration in the syngas after the quench varied between 46 and 289mg/Nm3 consisting of both carbon and easily volatile ash forming element significantly depending on the fuel ash content. Several different types of particles could be identified from classic soot particles to pure metallic zinc particles depending on the individual particle relation of carbon and ash forming elements. The results also indicate that ash forming elements and especially zinc interacts in the soot formation process creating a particle with shape and microstructure significantly different from a classical soot particle. © 2014 The Combustion Institute.

Keywords
Biomass, Gasification, HRTEM, SAED, Soot, Zinc, Energiteknik
National Category
Energy Engineering
Identifiers
urn:nbn:se:ri:diva-6940 (URN)10.1016/j.combustflame.2014.01.004 (DOI)2-s2.0-84901625416 (Scopus ID)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-06-24Bibliographically approved
Öhrman, O. .. .. & Pettersson, E. (2013). Dewatering of Biomass Using Liquid Bio Dimethyl Ether (ed.). Drying Technology, 31(11), 1267-1273
Open this publication in new window or tab >>Dewatering of Biomass Using Liquid Bio Dimethyl Ether
2013 (English)In: Drying Technology, ISSN 0737-3937, E-ISSN 1532-2300, Vol. 31, no 11, p. 1267-1273Article in journal (Refereed) Published
Abstract [en]

An interesting integrated configuration in a thermochemical conversion biorefinery that is producing dimethyl ether (DME) is to use a small fraction of the BioDME for dewatering of the solid biomass feedstock. Therefore, the use of liquid BioDME was investigated in this study for pressurized dewatering of biomass at room temperature. Water was removed in liquid form from wet sawdust and wet wood chips using liquid DME in a laboratory-scale batch unit. Both the sawdust and the wood chips could be dewatered in a short time (minutes) to a moisture content of 15% (w/w) from an initial content of approximately 55% (w/w). Longer DME treatment times (hours) lowered the moisture content even further down to 8% (w/w), indicating that the transport phenomena in the porous biomass and the solubility of DME in water influence the dewatering characteristics. The DME dewatering performance, 12-22 g DME per g water removed, was similar to literature data on coal dewatering using liquid DME. The present study showed that DME dewatering of the solid biomass feedstock has potential as an energy-efficient dewatering process, especially in an integrated thermochemical conversion biorefinery. © 2013 Copyright Taylor and Francis Group, LLC.

Keywords
Biomass, Dewatering, Dimethyl ether, Drying, Gasification, Energiteknik
National Category
Energy Engineering
Identifiers
urn:nbn:se:ri:diva-6951 (URN)10.1080/07373937.2013.788018 (DOI)2-s2.0-84883373521 (Scopus ID)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-06-24Bibliographically approved
Olwa, J., Öhman, M., Pettersson, E., Boström, D., Okure, M. & Kjellström, B. (2013). Potassium retention in updraft gasification of wood (ed.). Energy & Fuels, 27(11), 6718-6724
Open this publication in new window or tab >>Potassium retention in updraft gasification of wood
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2013 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 27, no 11, p. 6718-6724Article in journal (Refereed) Published
Abstract [en]

The release of compounds of K with producer gas during biomass gasification is known to play significant roles in fouling and high-temperature corrosion in boilers and high-temperature heat exchangers as well as blades in gas turbines that use producer gas as fuel. These phenomena are a major setback in the application of biomass fuel in combination with advanced process conditions. Updraft gasification provides gas filtering by the fuel bed with a gas cooling effect, conditions anticipated to create an avenue for K retention in the gasifier. The objective of this study was to determine the K retention potential of such gasifiers during wood gasification. Samples for the determination of the fate of K compounds included in the feedstock were collected from the generated producer gas using Teflon filters and gas wash bottles and also from wall deposits and ash residues. Analyses of samples were carried out using inductively coupled plasma-atomic emission spectrometry/mass spectrometry and X-ray diffraction methods. The finding was that about 99% of K was retained in the gasifier. K was found in the ash samples as a crystalline phase of K 2Ca(CO3)2(s) (fairchildite). A possible reaction mechanism leading to the formation of K2Ca(CO 3)2 is discussed in the paper. The 1% K understood as released, equivalent to 1200 ppbw content of K entrained in the producer gas stream, exceeds a known limit for application of the gas in conventional gas turbines. This would suggest application of the gas in an externally fired gas turbine system, where some limited K and other depositions in the heat exchanger can be relatively easy to handle. © 2013 American Chemical Society.

Keywords
Energiteknik
National Category
Energy Engineering
Identifiers
urn:nbn:se:ri:diva-6946 (URN)10.1021/ef401179f (DOI)2-s2.0-84888360866 (Scopus ID)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-06-24Bibliographically approved
Öhrman, O. G. .., Weiland, F., Johansson, A., Pettersson, E., Hedman, H., Leijenhorst, E. J., . . . van de Beld, L. (2013). Pressurized oxygen blown entrained flow gasification of pyrolysis oil.. In: Proceedings 21st European Biomass Conference and Exhibition: . Paper presented at Proceedings 21st European Biomass Conference and Exhibition.3 June 2013 through 7 June 2013. Copenhagen, Denmark. (pp. 441-445).
Open this publication in new window or tab >>Pressurized oxygen blown entrained flow gasification of pyrolysis oil.
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2013 (English)In: Proceedings 21st European Biomass Conference and Exhibition, 2013, p. 441-445Conference paper, Published paper (Refereed)
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-214 (URN)
Conference
Proceedings 21st European Biomass Conference and Exhibition.3 June 2013 through 7 June 2013. Copenhagen, Denmark.
Available from: 2016-06-13 Created: 2016-06-13 Last updated: 2019-06-24Bibliographically approved
Johansson, A., Öhrman, O. G. .., Pettersson, E. & Sweeney, D. (2013). Tar and trace element measurements in synthesis gas from a pressurized black liquor gasifier.. In: Proceedings 21st European Biomass Conference and Exhibition: . Paper presented at Proceedings 21st European Biomass Conference and Exhibition. 3 June 2013 through 7 June 2013. Copenhagen, Denmark..
Open this publication in new window or tab >>Tar and trace element measurements in synthesis gas from a pressurized black liquor gasifier.
2013 (English)In: Proceedings 21st European Biomass Conference and Exhibition, 2013Conference paper, Published paper (Refereed)
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-213 (URN)
Conference
Proceedings 21st European Biomass Conference and Exhibition. 3 June 2013 through 7 June 2013. Copenhagen, Denmark.
Available from: 2016-06-13 Created: 2016-06-13 Last updated: 2019-06-24Bibliographically approved
Wiinikka, H., Carlsson, P., Marklund, M., Grönberg, C., Pettersson, E., Lidman, M. & Gebart, R. (2012). Experimental investigation of an industrial scale black liquor gasifier: Part 2: Influence of quench operation on product gas composition (ed.). Fuel, 93, 117-129
Open this publication in new window or tab >>Experimental investigation of an industrial scale black liquor gasifier: Part 2: Influence of quench operation on product gas composition
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2012 (English)In: Fuel, Vol. 93, p. 117-129Article in journal (Refereed) Published
Keywords
Energiteknik
National Category
Energy Engineering
Identifiers
urn:nbn:se:ri:diva-6956 (URN)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-06-24Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1757-9456

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