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Göransson, Kristina
Publications (10 of 15) Show all publications
Göransson, K., Söderlind, U. & Zhang, W. (2018). Biogas production from biological methanation of syngas. In: European Biomass Conference and Exhibition Proceedings: . Paper presented at 26th European Biomass Conference and Exhibition -EUBCE 2018, Copenhagen, Denmark, 14-18 May 2018 (pp. 512-515). ETA-Florence Renewable Energies (26thEUBCE)
Open this publication in new window or tab >>Biogas production from biological methanation of syngas
2018 (English)In: European Biomass Conference and Exhibition Proceedings, ETA-Florence Renewable Energies , 2018, no 26thEUBCE, p. 512-515Conference paper, Published paper (Refereed)
Abstract [en]

Biogas to be used as gas vehicle fuel is a highly potential source to meet transport fuel demand and give a significant contribution to the Swedish target: vehicle fleet independent of fossil fuels by 2030. At present the biogas market is limited by the amount of available organic waste and the associated infrastructure. To overcome these issues, biomass could either be gasified into syngas and synthesized into bio-SNG (Synthetic Natural Gas) through catalytic methanation, or biomass gasification could be integrated into the biogas system to produce methane through biological methanation. Biomass gasification integrated in biological methanation is a relatively new idea and technology. Syngas conversion to methane by anaerobic cultures is practically unexplored, and few reports are available on this subject. Nevertheless, the pathway has been receiving intensive attractions and R&D recent years. For this purpose, a novel pathway by integrating biomass gasification into biogas system is studied in detail. This paper reviews the whole process from integration of biomass gasification into the biogas system to methane production through biological methanation: Biomass gasification > H2+CO > Biogas digester > Upgrading > Natural gas network. 

Place, publisher, year, edition, pages
ETA-Florence Renewable Energies, 2018
Keywords
Allothermal Gasification, Anaerobic Digestion, Synthetic Natural Gas (SNG), Thermochemical Conversion, Transport Sector
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-34568 (URN)2-s2.0-85051038909 (Scopus ID)
Conference
26th European Biomass Conference and Exhibition -EUBCE 2018, Copenhagen, Denmark, 14-18 May 2018
Available from: 2018-10-01 Created: 2018-10-01 Last updated: 2018-10-01Bibliographically approved
Göransson, K., Söderlind, U., Engstrand, P. & Zhang, W. (2015). An experimental study on catalytic bed materials in a biomass dual fluidised bed gasifier. Renewable energy, 81, 251-261
Open this publication in new window or tab >>An experimental study on catalytic bed materials in a biomass dual fluidised bed gasifier
2015 (English)In: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 81, p. 251-261Article in journal (Refereed) Published
Abstract [en]

A study on in-bed material catalytic reforming of tar/CH4 has been performed in the 150 kW allothermal gasifier at Mid Sweden University (MIUN). The major challenge in biomass fluidised-bed gasification to produce high-quality syngas, is the reforming of tars and CH4. The MIUN gasifier has a unique design suitable for in-bed tar/CH4 catalytic reforming and continuously internal regeneration of the reactive bed material. This paper evaluates the catalytic effects of olivine and Fe-impregnated olivine (10%wtFe/olivine Catalyst) with reference to silica sand in the MIUN dual fluidised bed (DFB) gasifier. Furthermore, a comparative experimental test is carried out with the same operation condition and bed-materials when the gasifier is operated in the mode of single bubbling fluidised bed (BFB), in order to detect the internal regeneration of the catalytic bed materials in the DFB operation. The behaviour of catalytic and non-catalytic bed materials differs when they are used in the DFB and the BFB. Fe/olivine and olivine in the BFB mode give lower tar and CH4 content together with higher H-2 + CO concentration, and higher H-2/CO ratio, compared to DFB mode. It is hard to show a clear advantage of Fe/olivine over olivine regarding tar/CH4 catalytic reforming. (C) 2015 Elsevier Ltd. All rights reserved.

Keywords
Biomass gasification, Tar reforming, Catalytic bed material, Dual fluidised bed
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-25638 (URN)10.1016/j.renene.2015.03.020 (DOI)000355359900025 ()2-s2.0-84936949072 (Scopus ID)
Available from: 2015-08-28 Created: 2015-08-18 Last updated: 2017-12-04Bibliographically approved
Göransson, K., Söderlind, U., Henschel, T., Engstrand, P. & Zhang, W. (2015). Internal tar/CH4 reforming in a biomass dual fluidised bed gasifier.. Biomass Conversion and Biorefinery, 5, 355-366
Open this publication in new window or tab >>Internal tar/CHreforming in a biomass dual fluidised bed gasifier.
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2015 (English)In: Biomass Conversion and Biorefinery, ISSN 2190-6815, Vol. 5, p. 355-366Article in journal (Refereed) Published
Abstract [en]

An internal reformer is developed for in situ catalyticreforming of tar and methane (CH4) in allothermal gasifiers.The study has been performed in the 150 kW dual fluidised bed (DFB) biomass gasifier at Mid Sweden University(MIUN). The MIUN gasifier is built for research onsynthetic fuel production. Reduction of tars and CH4 (exceptfor methanation application) in the syngas is a major challengefor commercialization of biomass fluidised-bed gasificationtechnology towards automotive fuel production. The MIUN gasifier has a unique design with an internal reformer, where intensive contact of gas and catalytic solids improves the reforming reactions. This paper presents an initial study on the internal reformer operated with and without Ni-catalytic pellets, by evaluation of the syngas composition and tar/CH4 content. A novel application of Ni-catalyst in DFB gasifiers is proposed and studied in this work. It can be concluded that the reformer with Ni-catalytic pellets clearly gives a higher H2 content together with lower CH4 and tar contents in the syngas than the reformer without Ni-catalytic pellets. The gravimetric tar content decreases down to 5 g/m3 and the CH4 content down below 6 % in the syngas. The tar content can be decreased further to lower levels, with increased gas contact to the specific surface area of the catalyst and increased catalyst surface-to-volume ratio. The new design in the MIUN gasifier increases the gasification efficiency, suppresses the tar generation and upgrades the syngas quality.

Keywords
Biomass gasification, Syngas cleaning, Tar removal, Tar/CH4 reformning, Dual fluidised bed, Ni-catalyst
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-23247 (URN)10.1007/s13399-014-0151-5 (DOI)2-s2.0-84978026015 (Scopus ID)
Note

Published online 2nd Oct 2014.

Available from: 2014-10-17 Created: 2014-10-17 Last updated: 2016-09-22Bibliographically approved
Göransson, K., Söderlind, U. & Zhang, W. (2014). CATALYTIC REDUCTION OF TAR/CH4 BY AN INTERNAL REFORMER IN A DFB GASIFIER. In: European Biomass Conference & Exhibition Proceedings: . Paper presented at 22nd EU BC&E 2014 – Hamburg, Germany 23-26 June 2014 (pp. 620-625).
Open this publication in new window or tab >>CATALYTIC REDUCTION OF TAR/CH4 BY AN INTERNAL REFORMER IN A DFB GASIFIER
2014 (English)In: European Biomass Conference & Exhibition Proceedings, 2014, p. 620-625Conference paper, Published paper (Other academic)
Abstract [en]

An internal reformer is developed for in-situ catalytic reforming of tar and methane (CH4) in allothermal gasifiers. Reduction of tars and CH4 in the syngas is a challenge for commercialization of biomass fluidised-bed gasification technology towards advanced automotive fuel production. This paper presents an initial study on the internal reformer operated with and without Ni-catalytic pellets in the Mid Sweden University (MIUN) DFB (Dual Fluidised Bed) gasifier, by evaluation of the syngas composition and tar/CH4 content. The novelty with the application of Ni-catalyst in this paper is the selected location where intensive gas to catalytic-material and bed-material contacts improve the reforming reactions. It can be concluded that the reformer with Ni-catalytic pellets clearly gives a higher H2 content together with lower CH4 and tar contents in the syngas than the reformer without Ni-catalytic pellets. The gravimetric tar content decreases down to 5 g/m3 and the CH4 content down below 6% in the syngas. The tar content will be decreased further to lower levels, with increased gas contact to the specific surface area of the catalyst and increased catalyst surface-to-volume ratio. The new design in the MIUN gasifier increases the gasification efficiency, suppresses the tar generation and upgrades the syngas quality.  

Keywords
Biomass Gasification, Syngas Cleaning, Tar Reduction, Methane Reforming, Tar-cracking Catalyst, Dual Fluidised Bed
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-23248 (URN)10.5071/22ndEUBCE2014-2AV.2.13 (DOI)000351053500114 ()978-88-89407-52-3 (ISBN)
Conference
22nd EU BC&E 2014 – Hamburg, Germany 23-26 June 2014
Projects
Bioenergy - gasification
Available from: 2014-10-17 Created: 2014-10-17 Last updated: 2016-12-16Bibliographically approved
Göransson, K., Söderlind, U., Henschel, T., Engstrand, P. & Zhang, W. (2014). Internal tar/CH4 reforming in a biomass dual fluidised bed gasifier. In: Proceeding of 4th International Symposium on Gasification and its Applications: . Paper presented at iSGA-4 (4th International Symposium on Gasification and its Applications), Wienna, Austria 2-5 Sept 2014.
Open this publication in new window or tab >>Internal tar/CH4 reforming in a biomass dual fluidised bed gasifier
Show others...
2014 (English)In: Proceeding of 4th International Symposium on Gasification and its Applications, 2014Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

An internal reformer is developed for in-situ catalytic reforming of tar and methane (CH4) in allothermal gasifiers. The study has been performed in the 150 kW dual fluidised bed (DFB) biomass gasifier at Mid Sweden University (MIUN). The MIUN gasifier is built for research on synthetic fuel production. Reduction of tars and CH4 (except for methanation application) in the syngas is a major challenge for commercialization of biomass fluidised-bed gasification technology towards automotive fuel production. The MIUN gasifier has a unique design with an internal reformer, where intensive contact of gas and catalytic solids improves the reforming reactions. This paper presents a study on the internal reformer operated with and without Ni-catalytic pellets, by evaluation of the syngas composition and tar/CH4 content. It can be concluded that the reformer with Ni-catalytic pellets clearly gives a higher H2 content together with lower CH4 and tar contents in the syngas than the reformer without Ni-catalytic pellets. The gravimetric tar content decreases down to 5 g/m3 and the CH4 content down below 6% in the syngas. The novel design in the MIUN gasifier increases the gasification efficiency, suppresses the tar generation and upgrades the syngas quality

Keywords
Biomass Gasification, Syngas Cleaning, Tar Removal, Tar/CH4 Reforming, Dual Fluidised Bed, Ni-catalyst
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-23249 (URN)
Conference
iSGA-4 (4th International Symposium on Gasification and its Applications), Wienna, Austria 2-5 Sept 2014
Available from: 2014-10-17 Created: 2014-10-17 Last updated: 2014-10-17Bibliographically approved
Göransson, K. (2014). Internal Tar/CH4 Reforming in Biomass Dual Fluidised Bed Gasifiers towards Fuel Synthesis. (Doctoral dissertation). Sundsvall: Mid Sweden University
Open this publication in new window or tab >>Internal Tar/CH4 Reforming in Biomass Dual Fluidised Bed Gasifiers towards Fuel Synthesis
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Production of high-quality syngas from biomass gasification in a dual fluidised bed gasifier (DFBG) has made a significant progress in R&D and Technology demonstration. An S&M scale bio-automotive fuel plant close to the feedstock resources is preferable as biomass feedstock is widely sparse and has relatively low density, low heating value and high moisture content. This requires simple, reliable and cost-effective production of clean and good syngas. Indirect DFBGs, with steam as the gasification agent, produce a syngas of high content H2 and CO with 12-20 MJ/mn3 heating value. The Mid Sweden University (MIUN) gasifier, built for research on synthetic fuel production, is a dual fluidised bed gasifier. Reforming of tars and CH4 (except for methanation application) in the syngas is a major challenge for commercialization of biomass fluidised-bed gasification technology towards automotive fuel production. A good syngas from DFBGs can be obtained by optimised design and operation of the gasifier, by the use of active catalytic bed material and internal reforming. This thesis presents a series of experimental tests with different operation parameters, reforming of tar and CH4 with catalytic bed material and reforming of tar and CH4 with catalytic internal reformer.

 

The first test was carried out to evaluate the optimal operation and performance of the MIUN gasifier. The test provides basic information for temperature control in the combustor and the gasifier by the bed material circulation rate.

 

 After proven operation and performance of the MIUN gasifier, an experimental study on in-bed material catalytic reforming of tar/CH4 is performed to evaluate the catalytic effects of the olivine and Fe-impregnated olivine (10%wtFe/olivine Catalyst) bed materials, with reference to non-catalytic silica sand operated in the mode of dual fluidised beds (DFB). A comparative experimental test is then carried out with the same operation condition and bed-materials but when the gasifier was operated in the mode of single bubbling fluidised bed (BFB). The behaviour of catalytic and non-catalytic bed materials differs when they are used in the DFB and the BFB. Fe/olivine and olivine in the BFB mode give lower tar and CH4 content together with higher H2+CO concentration, and higher H2/CO ratio, compared to DFB mode. It is hard to show a clear advantage of Fe/olivine over olivine regarding tar/CH4 catalytic reforming. 

 

In order to significantly reduce the tar/CH4 contents, an internal reformer, referred to as the FreeRef reformer, is developed for in-situ catalytic reforming of tar and CH4 using Ni-catalyst in an environment of good gas-solids contact at high temperature.  A study on the internal reformer filled with and without Ni-catalytic pellets was carried out by evaluation of the syngas composition and tar/CH4 content. It can be concluded that the reformer with Ni-catalytic pellets clearly gives a higher H2 content together with lower CH4 and tar contents in the syngas than the reformer without Ni-catalytic pellets. The gravimetric tar content decreases from 25 g/m3 down to 5 g/m3 and the CH4 content from 11% down below 6% in the syngas.

 

The MIUN gasifier has a unique design suitable for in-bed tar/CH4 catalytic reforming and continuously internal regeneration of the reactive bed material. The novel design in the MIUN gasifier increases the gasification efficiency, suppresses the tar generation and upgrades the syngas composition. 

 

Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University, 2014. p. 61
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 187
Keywords
Allothermal gasification, Bio-automotive fuels, Biomass gasification, Catalytic bed-material, Dual fluidised bed, Ni-catalyst, Syngas cleaning, Tar removal, Tar/CH4 reforming
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-22984 (URN)978-91-87557-58-3 (ISBN)
Public defence
2014-05-19, N109, Holmgatan 10, Sundsvall, 10:32 (English)
Opponent
Supervisors
Projects
Gasification-based Biorefinery for Mechanical Pulp Mills
Available from: 2014-09-15 Created: 2014-09-15 Last updated: 2015-03-13Bibliographically approved
Göransson, K., Söderlind, U. & Zhang, W. (2013). Internal Tar/CH4 Reforming using a Novel Design in a Biomass Dual Fluidised Bed Gasifier. In: 21st European Biomass Conference and Exhibition: Setting the course for a biobased ecomomy. Paper presented at 21st European Biomass Conference and Exhibition (pp. 2038-2042). Florence, Italy: ETA-Florence Renewable Energies
Open this publication in new window or tab >>Internal Tar/CH4 Reforming using a Novel Design in a Biomass Dual Fluidised Bed Gasifier
2013 (English)In: 21st European Biomass Conference and Exhibition: Setting the course for a biobased ecomomy, Florence, Italy: ETA-Florence Renewable Energies , 2013, p. 2038-2042Conference paper, Published paper (Other academic)
Abstract [en]

Reforming of tars and methane (CH4) in syngas is a significant challenge for low-temperature biomass gasification. For a dual fluidised bed gasifier (DFBG), catalytic bed materials are usually used to promote the reforming reactions. Intensive contact between gas and catalytic bed material at high temperature enhances the internal tar/CH4 reforming. The MIUN gasifier, built for research into synthetic fuel production, is a dual fluidised bed gasifier (DFBG). The results with different bed materials (silica sand, olivine and Fe-impregnated olivine) give roughly equivalent amounts of methane and gravimetric tar in the raw untreated syngas, and need to be reduced to an acceptably low level. The gasification research group at MIUN investigates a novel design in the MIUN gasifier, to increase the gasification efficiency, suppress the tar generation and to upgrade the syngas quality. The first step is taken towards a novel design in the MIUN gasifier. The application is expected to significantly enhance the syngas quality.

Place, publisher, year, edition, pages
Florence, Italy: ETA-Florence Renewable Energies, 2013
Series
European Biomass Conference and Exhibition Proceedings, ISSN 2282-5819
Keywords
Biomass Gasification, Syngas Cleaning, Tar Removal, Methane Reforming, Dual Fluidised Bed
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-20031 (URN)978-88-89407-53-0 (ISBN)
Conference
21st European Biomass Conference and Exhibition
Projects
FORE-subproject, Gasification-based Biorefinery for Mechanical Pulp Mills
Available from: 2013-10-21 Created: 2013-10-21 Last updated: 2013-10-28Bibliographically approved
He, J., Göransson, K., Söderlind, U. & Zhang, W. (2012). Simulation of biomass gasification in a dual fluidized bed gasifier. Biomass Conversion and Biorefinery, 2(1), 1-10
Open this publication in new window or tab >>Simulation of biomass gasification in a dual fluidized bed gasifier
2012 (English)In: Biomass Conversion and Biorefinery, ISSN 2190-6815, E-ISSN 2190-6823, Vol. 2, no 1, p. 1-10Article in journal (Refereed) Published
National Category
Bioenergy
Identifiers
urn:nbn:se:miun:diva-16182 (URN)10.1007/s13399-011-0030-2 (DOI)2-s2.0-84978021765 (Scopus ID)
Available from: 2012-05-07 Created: 2012-05-04 Last updated: 2017-07-04Bibliographically approved
Göransson, K., Söderlind, U. & Zhang, W. (2012). Tar/CH4 Reforming by Catalytic Bed Materials in a Biomass Fluidised Bed Gasifier. In: 20th European Biomass Conference & Exhibition: Proceedings of the International Confernce held in Milano, Italy, 18 - 22 June 2012. Paper presented at 20th European Biomass Conference & Exhibition.
Open this publication in new window or tab >>Tar/CH4 Reforming by Catalytic Bed Materials in a Biomass Fluidised Bed Gasifier
2012 (English)In: 20th European Biomass Conference & Exhibition: Proceedings of the International Confernce held in Milano, Italy, 18 - 22 June 2012, 2012Conference paper, Oral presentation only (Other academic)
Abstract [en]

A study on in-bed catalytic material reforming of tar/methane (CH4) has been performed in the 150 kW allothermal biomass gasifier at Mid Sweden University (MIUN). The MIUN gasifier, built for research on synthetic fuel production, is a dual fluidised bed gasifier (DFBG). The syngas for automotive fuels synthesis has a strict specification of impurities. The biggest challenge for biomass fluidised-bed gasification is the reforming of tars and CH4. Internal reforming should be considered before downstream reforming. The MIUN gasifier has a unique design suitable for in-bed tar/CH4 catalytic reforming and continuously internal regeneration of the reactive bed material. The experimental tests are carried out in three cases: 1) basic condition with silica sand (no catalytic activity), 2) calcinated olivine, and 3) Fe-impregnated olivine (10%wtFe/Olivine Catalyst). The measurement results have been evaluated by comparing tar/CH4 content in the syngas from the gasifier operated under different operation conditions. These results in BFB mode have initiated the ongoing investigations of the catalytic effects and regeneration in DFB mode. It can be concluded that the Fe-impregnated olivine showed a surprising low reactivity for tar and CH4 reforming in the BFB model. 

National Category
Other Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-16580 (URN)
Conference
20th European Biomass Conference & Exhibition
Projects
FORE-subproject, Gasification-based Biorefinery for Mechanical Pulp Mills
Available from: 2012-06-27 Created: 2012-06-27 Last updated: 2013-02-12Bibliographically approved
Göransson, K., Söderlind, U. & Zhang, W. (2011). Experimental test on a novel dual fluidised bed biomass gasifier for synthetic fuel production. Fuel, 90(4), 1340-1349
Open this publication in new window or tab >>Experimental test on a novel dual fluidised bed biomass gasifier for synthetic fuel production
2011 (English)In: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 90, no 4, p. 1340-1349Article in journal (Refereed) Published
Abstract [en]

This article presents a preliminary test on the 150 kWth allothermal biomass gasifier at MIUN (Mid Sweden University) in Härnösand, Sweden. The MIUN gasifier is a combination of a fluidised bed gasifier and a CFB riser as a combustor with a design suitable for in-built tar/CH4 catalytic reforming. The test was carried out by two steps: 1) fluid-dynamic study; 2) measurements of gas composition and tar. A novel solid circulation measurement system which works at high bed temperatures is developed in the presented work. The results show the dependency of bed material circulation rate on the superficial gas velocity in the combustor, the bed material inventory and the aeration of solids flow between the bottoms of the gasifier and the combustor. A strong influence of circulation rate on the temperature difference between the combustor and the gasifier was identified. The syngas analysis showed that, as steam/biomass (S/B) ratio increases, CH4 content decreases and H2/CO ratio increases. Furthermore the total tar content decreases with increasing steam/biomass ratio and increasing temperature.  The biomass gasification technology at MIUN is simple, cheap, reliable, and can obtain a syngas of high CO+H2concentration with sufficient high ratio of H2 to CO, which may be suitable for synthesis of Methane, DME, FT-fuels or alcohol fuels. The measurement results of MIUN gasifier have been compared with other gasifiers. The main differences can be observed in the H2 and the CO content, as well as the tar content. These can be explained by differences in the feed systems, operating temperature, S/B ratio or bed material catalytic effect etc..

Keywords
allothermal gasification, biofuel, biomass, gasifier, syngas
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-12907 (URN)10.1016/j.fuel.2010.12.035 (DOI)000287652300004 ()2-s2.0-79951921720 (Scopus ID)
Projects
Development of BTL towards small scale automotive fuel plants
Available from: 2010-12-29 Created: 2010-12-29 Last updated: 2017-12-11Bibliographically approved
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