The impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour
The Ash Fusion Test (AFT) is considered to be the most popular method of characterising the melt characteristics of solid fuel ash. This study shows how pellet preparation can make significant improvements to repeatability. Pelleting pressure, pellet particle size, pellet shape, and furnace ramp rat...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019
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| Online Access: | https://eprints.nottingham.ac.uk/56726/ |
| _version_ | 1848799371416567808 |
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| author | Daley, Patrick James Williams, Orla Heng Pang, Cheng Wu, Tao Lester, Edward |
| author_facet | Daley, Patrick James Williams, Orla Heng Pang, Cheng Wu, Tao Lester, Edward |
| author_sort | Daley, Patrick James |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The Ash Fusion Test (AFT) is considered to be the most popular method of characterising the melt characteristics of solid fuel ash. This study shows how pellet preparation can make significant improvements to repeatability. Pelleting pressure, pellet particle size, pellet shape, and furnace ramp rate were investigated to establish the most repeatable representation of ash melting relevant to pulverised fuel combustion in a furnace in an oxidizing atmosphere up to 1600 °C. A 5 mm machine pressed pellet was found to produce the best results as it identified the earliest initial deformation temperature (IDT), gave the least error, and displayed the greatest visible change in pellet height to enable easy identification. Reducing maximum ash particle size to <72 µm and increasing the pressure of the pelleting process was also shown to produce a 120 °C reduction in the IDT when compared with other methods. Reducing the ashing temperature and retaining volatiles lost during high temperature ashing were shown to have a negligible impact on IDT. The characteristic AFT curve was also used to quantify the extent of shrinkage and swelling during the test. |
| first_indexed | 2025-11-14T20:34:36Z |
| format | Article |
| id | nottingham-56726 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T20:34:36Z |
| publishDate | 2019 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-567262019-05-20T10:06:34Z https://eprints.nottingham.ac.uk/56726/ The impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour Daley, Patrick James Williams, Orla Heng Pang, Cheng Wu, Tao Lester, Edward The Ash Fusion Test (AFT) is considered to be the most popular method of characterising the melt characteristics of solid fuel ash. This study shows how pellet preparation can make significant improvements to repeatability. Pelleting pressure, pellet particle size, pellet shape, and furnace ramp rate were investigated to establish the most repeatable representation of ash melting relevant to pulverised fuel combustion in a furnace in an oxidizing atmosphere up to 1600 °C. A 5 mm machine pressed pellet was found to produce the best results as it identified the earliest initial deformation temperature (IDT), gave the least error, and displayed the greatest visible change in pellet height to enable easy identification. Reducing maximum ash particle size to <72 µm and increasing the pressure of the pelleting process was also shown to produce a 120 °C reduction in the IDT when compared with other methods. Reducing the ashing temperature and retaining volatiles lost during high temperature ashing were shown to have a negligible impact on IDT. The characteristic AFT curve was also used to quantify the extent of shrinkage and swelling during the test. Elsevier 2019-04-28 Article PeerReviewed application/pdf en cc_by https://eprints.nottingham.ac.uk/56726/1/1-s2.0-S0016236119305265-main.pdf Daley, Patrick James, Williams, Orla, Heng Pang, Cheng, Wu, Tao and Lester, Edward (2019) The impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour. Fuel, 251 . pp. 779-788. ISSN 0016-2361 Coal; Biomass; Advanced ash fusion test;Ash;Pellet preparation; Initial deformation temperature http://dx.doi.org/10.1016/j.fuel.2019.03.142 doi:10.1016/j.fuel.2019.03.142 doi:10.1016/j.fuel.2019.03.142 |
| spellingShingle | Coal; Biomass; Advanced ash fusion test;Ash;Pellet preparation; Initial deformation temperature Daley, Patrick James Williams, Orla Heng Pang, Cheng Wu, Tao Lester, Edward The impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour |
| title | The impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour |
| title_full | The impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour |
| title_fullStr | The impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour |
| title_full_unstemmed | The impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour |
| title_short | The impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour |
| title_sort | impact of ash pellet characteristics and pellet processing parameters on ash fusion behaviour |
| topic | Coal; Biomass; Advanced ash fusion test;Ash;Pellet preparation; Initial deformation temperature |
| url | https://eprints.nottingham.ac.uk/56726/ https://eprints.nottingham.ac.uk/56726/ https://eprints.nottingham.ac.uk/56726/ |