Fuel pellet production from reed canary grass
This thesis focuses on two main areas: methods for assessing regional supply potentials of reed canary grass (Phalaris arundinacea L.) (RCG); and process technology for the production of high-quality RCG pellets. Partial equilibrium modelling, incorporating a break-even price approach, was used to e...
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Language: | English |
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ftslunivuppsala:oai:pub.epsilon.slu.se:1786 2024-06-09T07:48:37+00:00 Fuel pellet production from reed canary grass Larsson, Sylvia 2008 application/pdf https://pub.epsilon.slu.se/1786/ https://pub.epsilon.slu.se/1786/1/Kappa_080904_Sylvia.pdf eng eng https://pub.epsilon.slu.se/1786/1/Kappa_080904_Sylvia.pdf Larsson, Sylvia (2008). Fuel pellet production from reed canary grass. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2008:65 ISBN 978-91-85913-98-5 [Doctoral thesis] Doctoral thesis NonPeerReviewed 2008 ftslunivuppsala 2024-05-16T04:04:25Z This thesis focuses on two main areas: methods for assessing regional supply potentials of reed canary grass (Phalaris arundinacea L.) (RCG); and process technology for the production of high-quality RCG pellets. Partial equilibrium modelling, incorporating a break-even price approach, was used to examine supply potentials for RCG in Västerbotten County, northern Sweden. A remote sensing method, using black and white orthophoto interpretation, was developed, by which abandoned fields with low preparation costs (on average 173 SEK (ha)-1) could be distinguished from fields with high preparation costs (on average 3990 SEK (ha)-1). Based on the assumptions made, RCG production would predominantly be viable in the coastal area of Västerbotten County, and production equal to 1.3 TWh could be supplied at a farmgate fuel price of 116 SEK MW-1h-1. Pelletizing RCG allows it to be transported, stored and handled more easily. To determine the optimum conditions for RCG pelletizing, experiments were performed in an experimental design incorporating the factors: moisture content, steam addition, raw material density, and die temperature. Pre-compaction of the raw material was an efficient method for avoiding uneven pellet production. Through multiple response optimization, process settings were identified for the production of RCG pellets with a bulk density ≥ 650 kg m-3 and a durability ≥ 97.5%. To clarify the underlying mechanisms in the pelletizing process, the influences of moisture content and normal stress on the kinematic wall friction properties of RCG powder were studied. A steep increase in the kinematic wall friction with increasing normal stress was found in the normal stress interval 50-150 MPa. Multiple linear regression modelling of kinematic wall friction measurements at high normal stresses (65 to 376 MPa) revealed a local maximum at moisture contents of 13–16% and normal stresses of 150–225 MPa. Kinematic wall friction and pellet durability maxima occurred in overlapping moisture content ranges; it was, ... Doctoral or Postdoctoral Thesis Northern Sweden Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
institution |
Open Polar |
collection |
Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
op_collection_id |
ftslunivuppsala |
language |
English |
description |
This thesis focuses on two main areas: methods for assessing regional supply potentials of reed canary grass (Phalaris arundinacea L.) (RCG); and process technology for the production of high-quality RCG pellets. Partial equilibrium modelling, incorporating a break-even price approach, was used to examine supply potentials for RCG in Västerbotten County, northern Sweden. A remote sensing method, using black and white orthophoto interpretation, was developed, by which abandoned fields with low preparation costs (on average 173 SEK (ha)-1) could be distinguished from fields with high preparation costs (on average 3990 SEK (ha)-1). Based on the assumptions made, RCG production would predominantly be viable in the coastal area of Västerbotten County, and production equal to 1.3 TWh could be supplied at a farmgate fuel price of 116 SEK MW-1h-1. Pelletizing RCG allows it to be transported, stored and handled more easily. To determine the optimum conditions for RCG pelletizing, experiments were performed in an experimental design incorporating the factors: moisture content, steam addition, raw material density, and die temperature. Pre-compaction of the raw material was an efficient method for avoiding uneven pellet production. Through multiple response optimization, process settings were identified for the production of RCG pellets with a bulk density ≥ 650 kg m-3 and a durability ≥ 97.5%. To clarify the underlying mechanisms in the pelletizing process, the influences of moisture content and normal stress on the kinematic wall friction properties of RCG powder were studied. A steep increase in the kinematic wall friction with increasing normal stress was found in the normal stress interval 50-150 MPa. Multiple linear regression modelling of kinematic wall friction measurements at high normal stresses (65 to 376 MPa) revealed a local maximum at moisture contents of 13–16% and normal stresses of 150–225 MPa. Kinematic wall friction and pellet durability maxima occurred in overlapping moisture content ranges; it was, ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Larsson, Sylvia |
spellingShingle |
Larsson, Sylvia Fuel pellet production from reed canary grass |
author_facet |
Larsson, Sylvia |
author_sort |
Larsson, Sylvia |
title |
Fuel pellet production from reed canary grass |
title_short |
Fuel pellet production from reed canary grass |
title_full |
Fuel pellet production from reed canary grass |
title_fullStr |
Fuel pellet production from reed canary grass |
title_full_unstemmed |
Fuel pellet production from reed canary grass |
title_sort |
fuel pellet production from reed canary grass |
publishDate |
2008 |
url |
https://pub.epsilon.slu.se/1786/ https://pub.epsilon.slu.se/1786/1/Kappa_080904_Sylvia.pdf |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
https://pub.epsilon.slu.se/1786/1/Kappa_080904_Sylvia.pdf Larsson, Sylvia (2008). Fuel pellet production from reed canary grass. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2008:65 ISBN 978-91-85913-98-5 [Doctoral thesis] |
_version_ |
1801380414647959552 |