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Gustafsson, Eva
Publications (10 of 17) Show all publications
Gustafsson, E. & Hagberg, M. (2017). Att som familj leva i skuggan av demenssjukdom (2ed.). In: E. Benzein, M. Hagberg, B-I. Saveman (Ed.), Att möta familjer inom vård och omsorg: (pp. 179-194). Lund: Studentlitteratur AB
Open this publication in new window or tab >>Att som familj leva i skuggan av demenssjukdom
2017 (Swedish)In: Att möta familjer inom vård och omsorg / [ed] E. Benzein, M. Hagberg, B-I. Saveman, Lund: Studentlitteratur AB, 2017, 2, p. 179-194Chapter in book (Other academic)
Place, publisher, year, edition, pages
Lund: Studentlitteratur AB, 2017 Edition: 2
National Category
Nursing
Research subject
Health and Caring Sciences
Identifiers
urn:nbn:se:lnu:diva-81791 (URN)9789144115870 (ISBN)
Available from: 2019-04-10 Created: 2019-04-10 Last updated: 2019-04-10Bibliographically approved
Gustafsson, E. & Hagberg, M. (2017). "Jag har kvar min Solveig och ändå är hon borta" - utdrag ur en makes dagbok (2ed.). In: E. Benzein, M. Hagberg, B-I. Saveman (Ed.), Att möta familjer inom vård och omsorg: (pp. 165-178). Lund: Studentlitteratur AB
Open this publication in new window or tab >>"Jag har kvar min Solveig och ändå är hon borta" - utdrag ur en makes dagbok
2017 (Swedish)In: Att möta familjer inom vård och omsorg / [ed] E. Benzein, M. Hagberg, B-I. Saveman, Lund: Studentlitteratur AB, 2017, 2, p. 165-178Chapter in book (Other academic)
Place, publisher, year, edition, pages
Lund: Studentlitteratur AB, 2017 Edition: 2
National Category
Nursing
Research subject
Health and Caring Sciences
Identifiers
urn:nbn:se:lnu:diva-81790 (URN)9789144115870 (ISBN)
Available from: 2019-04-10 Created: 2019-04-10 Last updated: 2019-04-10Bibliographically approved
Lin, L., Gustafsson, E. & Strand, M. (2011). Aerosol-based method for investigating biomass char reactivity at high temperatures. Combustion and Flame, 158(7), 1426-1437
Open this publication in new window or tab >>Aerosol-based method for investigating biomass char reactivity at high temperatures
2011 (English)In: Combustion and Flame, ISSN 0010-2180, E-ISSN 1556-2921, Vol. 158, no 7, p. 1426-1437Article in journal (Refereed) Published
Abstract [en]

An aerosol-based method was proposed and developed to characterize particles fragmented from biomass chars during oxidation. The chars were prepared from both wood and miscanthus pellets under various pyrolysis conditions. Char fragments with aerodynamic diameters in the range of 0.5–10 μm were suspended and transported in a reactive gas through an aerosol reactor, which was heated by an electric oven. The oxidation of char particles in the reactor was investigated by determining on-line the particle size distributions before and after passage through the reactor using an aerodynamic particle sizer (APS) spectrometer. The interpretation of APS data was evaluated by both experiments and models in which the fine char particles were assumed to keep either constant density or constant diameter during the oxidation process. The results indicate that the aerosol-based method can be used to determine reaction kinetics of char particles in the high temperature range, where oxidation is normally controlled by diffusion limitation if measuring with the conventional techniques. The application of the aerosol method indicated that high pyrolysis temperature and prolonged retention time will reduce the char reactivity.

National Category
Industrial Biotechnology
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
urn:nbn:se:lnu:diva-7044 (URN)10.1016/j.combustflame.2010.11.015 (DOI)2-s2.0-79955881888 (Scopus ID)
Available from: 2010-08-12 Created: 2010-08-09 Last updated: 2017-12-12Bibliographically approved
Gustafsson, E. (2011). Characterization of particulate matter from atmospheric fluidized bed biomass gasifiers. (Doctoral dissertation). Växjö, Kalmar: Linnaeus University Press
Open this publication in new window or tab >>Characterization of particulate matter from atmospheric fluidized bed biomass gasifiers
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Through biomass gasification, biomass can be converted at high temperature to a product gas rich in carbon monoxide, hydrogen, and methane. After cleaning and upgrading, the product gas can be converted to biofuels such as hydrogen; methanol; dimethyl ether; and synthetic diesel, gasoline, and natural gas. Particulate matter (PM) is formed as a contaminant in the gasification process, and the aim of this work was to develop and apply a method for sampling and characterization of PM in the hot product gas.

 

A particle measurement system consisting of a dilution probe combined in series with a bed of granular activated carbon for tar adsorption was developed, with the aim of extracting a sample of the hot product gas without changing the size distribution and composition of the PM. The mass size distribution and concentration, as well as the morphology and elementary composition, of PM in the size range 10 nm to 10 µm in the product gas from a bubbling fluidized bed (BFB) gasifier, a circulating fluidized bed (CFB) gasifier and an indirect BFB gasifier using various types of biomass as fuel were determined.

 

All gasifiers and fuels displayed a bimodal particle mass size distribution with a fine mode in the <0.5 µm size range and a coarse mode in the >0.5 µm size range. Compared with the mass concentration of the coarse mode the mass concentration of the fine mode was low from all gasifiers. The evaluation of the results for the fine-mode PM was complicated by condensing potassium chloride for the CFB gasifier when using miscanthus as fuel and by condensing tars for the indirect BFB gasifier when using wood C as fuel. The mass concentration of the coarse-mode PM was higher from the CFB gasifier than from the two BFB gasifiers. The coarse-mode PM from the BFB gasifier when using wood A as fuel was dominated by char. In the CFB gasifier the coarse-mode PM was mainly ash and bed material when using all fuels. The coarse-mode PM from the indirect BFB gasifier when using wood C as fuel was mainly ash.

Place, publisher, year, edition, pages
Växjö, Kalmar: Linnaeus University Press, 2011
Series
Linnaeus University Dissertations ; 50/2011
Keywords
biomass gasification, fluidized bed, particulate matter, particle morphology, particle elementary composition
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
urn:nbn:se:lnu:diva-11473 (URN)978-91-86491-80-2 (ISBN)
Public defence
2011-05-27, Wicksell, Linnéuniversitetet, 351 95 Växjö, Växjö, 10:00 (English)
Opponent
Supervisors
Available from: 2011-04-27 Created: 2011-04-27 Last updated: 2011-05-02Bibliographically approved
Gustafsson, E., Lin, L. & Strand, M. (2011). Characterization of particulate matter in the hot product gas from atmospheric fluidized bed biomass gasifiers. Biomass and Bioenergy, 35(Supplement 1), 71-78
Open this publication in new window or tab >>Characterization of particulate matter in the hot product gas from atmospheric fluidized bed biomass gasifiers
2011 (English)In: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 35, no Supplement 1, p. 71-78Article in journal (Refereed) Published
Abstract [en]

This study compares the characteristics of particulate matter (PM) in the hot product gas from three different atmospheric fluidized bed biomass gasifiers: a bubbling fluidized bed (BFB) gasifier, a circulating fluidized bed (CFB) gasifier, and an indirect BFB gasifier (the latter integrated with a CFB boiler). All gasifiers displayed a bimodal particle mass size distribution with a fine mode in the <0.5 μm size range and a coarse mode in the >0.5 μm size range. Compared with the mass concentration of the coarse mode the mass concentration of the fine mode was low in all gasifiers. For both the BFB and CFB gasifiers the fine-mode PM had a similar inorganic composition, indicating an origin from the ash and the magnesite bed material used in both gasifiers. In the indirect BFB gasifier the fine-mode PM was instead dominated by potassium and chlorine, and the tar fraction properties evoked tar condensation in the sampling system that affected mainly the fine-mode PM. The coarse-mode PM in the BFB gasifier was dominated by char fragments abraded from the pyrolyzed wood pellets. In the CFB gasifier the coarse-mode PM was mainly ash and magnesite bed material that passed through the process cyclone. In the indirect BFB gasifier the coarse-mode PM was mainly ash, probably originating both from the BFB gasifier and the CFB boiler.

Keywords
Biomass gasification, particulate matter
National Category
Bioenergy
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
urn:nbn:se:lnu:diva-11263 (URN)10.1016/j.biombioe.2011.02.053 (DOI)2-s2.0-80054840488 (Scopus ID)
Available from: 2011-03-29 Created: 2011-03-29 Last updated: 2017-12-11Bibliographically approved
Gustafsson, E., Lin, L., Seemann, M. C., Rodin, J. & Strand, M. (2011). Characterization of Particulate Matter in the Hot Product Gas from Indirect Steam Bubbling Fluidized Bed Gasification of Wood Pellets. Energy & Fuels, 25(4), 1781-1789
Open this publication in new window or tab >>Characterization of Particulate Matter in the Hot Product Gas from Indirect Steam Bubbling Fluidized Bed Gasification of Wood Pellets
Show others...
2011 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 25, no 4, p. 1781-1789Article in journal (Refereed) Published
Abstract [en]

This study characterized the particulate matter (PM) formed during the indirect steam bubbling fluidized bed gasification of wood pellets at atmospheric pressure. A system including a dilution probe, a bed of granular activated carbon, and a thermodenuder was used to sample the PM at high temperature with the aim of separating it from condensing inorganic vapors and tars. The particle mass size distribution was bimodal with a fine mode in the <0.5-μm size range and a dominating coarse mode in the >0.5-μm size range. The coarse mode was representatively characterized while condensing inorganic vapors and tars complicated the evaluation of the results for the fine-mode PM. Morphological analysis of the PM indicated that the char content was low. The inorganic fraction was dominated by potassium and chlorine for fine-mode PM and calcium and silicon for coarse-mode PM.

Keywords
Biomass gasification, particulate matter
National Category
Industrial Biotechnology
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
urn:nbn:se:lnu:diva-11261 (URN)10.1021/ef101710u (DOI)2-s2.0-79955373271 (Scopus ID)
Available from: 2011-03-29 Created: 2011-03-29 Last updated: 2017-12-11Bibliographically approved
Strand, M., Gustafsson, E., Lin, L. & Yang, J. (2011). High-Temperature extraction of aerosol particles from biomass combustion and gasification. In: European Aerosol Conference 2011: . Paper presented at European Aerosol Conference.
Open this publication in new window or tab >>High-Temperature extraction of aerosol particles from biomass combustion and gasification
2011 (English)In: European Aerosol Conference 2011, 2011Conference paper, Published paper (Refereed)
National Category
Other Chemical Engineering
Research subject
Technology (byts ev till Engineering)
Identifiers
urn:nbn:se:lnu:diva-14257 (URN)
Conference
European Aerosol Conference
Available from: 2011-09-17 Created: 2011-09-17 Last updated: 2015-06-08Bibliographically approved
Gustafsson, E., Lin, L. & Strand, M. (2010). Characteristics of aerosol particles from steam and oxygen gasification of various biofuels. In: 18th European Biomass Conference and Exhibition: From resarch to industry and markets. Paper presented at 18th European Biomass Conference and Exhibition (pp. 900-902). ETA Renewable Energies and WIP Renewable Energies
Open this publication in new window or tab >>Characteristics of aerosol particles from steam and oxygen gasification of various biofuels
2010 (English)In: 18th European Biomass Conference and Exhibition: From resarch to industry and markets, ETA Renewable Energies and WIP Renewable Energies , 2010, p. 900-902Conference paper, Published paper (Refereed)
Abstract [en]

The present study investigated how the characteristics of the particulate matter (PM) from steam and oxygen gasification of biomass were affected by the biofuel used. The results show that the biofuel had a large impact on the fine mode PM generated during the gasification, both on the particle size distribution and on the elementary composition. When using miscanthus as fuel, high concentrations of ultrafine particles consisting of potassium chloride were formed compared to when using high- and low-quality wood (wood A and wood B) as fuels. The impact of the biofuel on the coarse mode PM was less in this study. Large amounts of bed material dominated the coarse fraction. However, heavy metals were detected in the coarse mode PM when using wood B, constituting treated wood, as fuel.

Place, publisher, year, edition, pages
ETA Renewable Energies and WIP Renewable Energies, 2010
National Category
Bioenergy
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
urn:nbn:se:lnu:diva-7322 (URN)978-88-89407-56-5 (ISBN)
Conference
18th European Biomass Conference and Exhibition
Available from: 2010-08-16 Created: 2010-08-16 Last updated: 2015-05-27Bibliographically approved
Strand, M. & Gustafsson, E. (2010). Final Report on the Recommended General Design andDevelopment of Gas and Aerosol Particle Sampling Probes.
Open this publication in new window or tab >>Final Report on the Recommended General Design andDevelopment of Gas and Aerosol Particle Sampling Probes
2010 (English)Report (Other academic)
Publisher
p. 15
Series
CHRISGAS reports
National Category
Energy Engineering
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
urn:nbn:se:lnu:diva-7314 (URN)
Available from: 2010-08-15 Created: 2010-08-15 Last updated: 2011-03-22Bibliographically approved
Lin, L., Gustafsson, E. & Strand, M. (2010). High-temperature Kinetics of Fine Biomass Char Particles in Air and CO2. In: 18th European Biomass Conference and Exhibition: From Research to Industry and Markets.
Open this publication in new window or tab >>High-temperature Kinetics of Fine Biomass Char Particles in Air and CO2
2010 (English)In: 18th European Biomass Conference and Exhibition: From Research to Industry and Markets, 2010Conference paper, Published paper (Refereed)
Abstract [en]

Knowledge of reliable chemical kinetics of char always plays significant roles in the modelling, design and optimization of processes during biofuel thermochemical conversions.The determination of reaction kinetics of char in the high-temperature range still highly depends on the extrapolation of results from kinetic data determined at lower temperatures due to mass and heat transfer limitations. In this work an aerosol-based method was used to investigate the reactivity of singly-distributed char particles with aerodynamic diameters between 0.5-10 mm. The conversion of char particles in the reactor at varying temperatures and residence time was determined by comparing the particle size distributions before and after passing the reactor, using an aerodynamic particle sizer (APS) spectrometer. The results of char particles reacted with air, CO2 and steam indicate that the aerosol-based method can be used to determine reaction kinetics of char particles in the high temperature range where reaction is controlled by diffusion limitation if using conventional thermogravimetric analysis (TGA). By combining the aerosol-based method and conventional TGA, the oxidation and gasification kinetic parameters of biomass char can be derived in the temperature range of 350-800ºC, and 800-1200ºC respectively. The aerosol-based method shows the potential of on-line measuring the char reactivity.

National Category
Engineering and Technology
Research subject
Technology (byts ev till Engineering)
Identifiers
urn:nbn:se:lnu:diva-6965 (URN)978-88-89407-56-5 (ISBN)
Available from: 2010-08-09 Created: 2010-08-04 Last updated: 2014-05-08Bibliographically approved
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