Experimental investigation on the effect of blending bituminous coal with pinus sawdust on combustion performance parameters
Combustion of bituminous coal and pinus sawdust blends was investigated experimentally within a drop tube furnace (DTF) with the aim of determining particle residence times and temperatures during the process. Evaluation of these parameters gives useful information to engineers who want to optimise...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-03-01
|
| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844024033188 |
| _version_ | 1827294082959933440 |
|---|---|
| author | Garikai T. Marangwanda Daniel M. Madyira |
| author_facet | Garikai T. Marangwanda Daniel M. Madyira |
| author_sort | Garikai T. Marangwanda |
| collection | DOAJ |
| description | Combustion of bituminous coal and pinus sawdust blends was investigated experimentally within a drop tube furnace (DTF) with the aim of determining particle residence times and temperatures during the process. Evaluation of these parameters gives useful information to engineers who want to optimise the co-combustion process of coal and biomass blends. The DTF experimental approach was used to investigate fuel blends with a pinus sawdust mass substitution of 0, 10, 20, and 30% at different furnace temperatures of 1273, 1473 and 1673 K. Results showed that during stage 1 of the experimental setup which mimics devolatilisation, particle residence time at a distance of 520 mm from the injection point decreased from 0.8 to 0.7 s as blending by pinus sawdust increased from 0 to 30 %. During stage 2 of the experimental setup which mimics char combustion, particle residence time at a distance of 1320 mm from the injection point decreased from 3.9 to 2.0 s as blending by pinus sawdust increased from 0 to 30 %. The blending ratios under investigation demonstrated similar profiles of particle temperature at different furnace positions though further analysis showed that the highly blended samples required less time to attain high temperatures. By extension, since fuel blends with higher percentages of pinus sawdust were able to attain higher temperatures at shorter residence time, combustion intensity was deduced to increase with the blending ratio whilst stability decreased. As such, caution should be taken with materials used for furnace and burner design as high-temperature zones move backwards towards the injection point as blending increases. |
| first_indexed | 2024-04-24T13:50:50Z |
| format | Article |
| id | doaj.art-d02d597678c1465bb193e9a60f6d8d9d |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-24T13:50:50Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-d02d597678c1465bb193e9a60f6d8d9d2024-04-04T05:04:33ZengElsevierHeliyon2405-84402024-03-01106e27287Experimental investigation on the effect of blending bituminous coal with pinus sawdust on combustion performance parametersGarikai T. Marangwanda0Daniel M. Madyira1Department of Mechanical Engineering Science, University of Johannesburg, Johannesburg, South AfricaCorresponding author.; Department of Mechanical Engineering Science, University of Johannesburg, Johannesburg, South AfricaCombustion of bituminous coal and pinus sawdust blends was investigated experimentally within a drop tube furnace (DTF) with the aim of determining particle residence times and temperatures during the process. Evaluation of these parameters gives useful information to engineers who want to optimise the co-combustion process of coal and biomass blends. The DTF experimental approach was used to investigate fuel blends with a pinus sawdust mass substitution of 0, 10, 20, and 30% at different furnace temperatures of 1273, 1473 and 1673 K. Results showed that during stage 1 of the experimental setup which mimics devolatilisation, particle residence time at a distance of 520 mm from the injection point decreased from 0.8 to 0.7 s as blending by pinus sawdust increased from 0 to 30 %. During stage 2 of the experimental setup which mimics char combustion, particle residence time at a distance of 1320 mm from the injection point decreased from 3.9 to 2.0 s as blending by pinus sawdust increased from 0 to 30 %. The blending ratios under investigation demonstrated similar profiles of particle temperature at different furnace positions though further analysis showed that the highly blended samples required less time to attain high temperatures. By extension, since fuel blends with higher percentages of pinus sawdust were able to attain higher temperatures at shorter residence time, combustion intensity was deduced to increase with the blending ratio whilst stability decreased. As such, caution should be taken with materials used for furnace and burner design as high-temperature zones move backwards towards the injection point as blending increases.http://www.sciencedirect.com/science/article/pii/S2405844024033188Co-combustionDrop tube furnaceParticle residence timeBituminous coalPinus sawdustParticle temperature |
| spellingShingle | Garikai T. Marangwanda Daniel M. Madyira Experimental investigation on the effect of blending bituminous coal with pinus sawdust on combustion performance parameters Heliyon Co-combustion Drop tube furnace Particle residence time Bituminous coal Pinus sawdust Particle temperature |
| title | Experimental investigation on the effect of blending bituminous coal with pinus sawdust on combustion performance parameters |
| title_full | Experimental investigation on the effect of blending bituminous coal with pinus sawdust on combustion performance parameters |
| title_fullStr | Experimental investigation on the effect of blending bituminous coal with pinus sawdust on combustion performance parameters |
| title_full_unstemmed | Experimental investigation on the effect of blending bituminous coal with pinus sawdust on combustion performance parameters |
| title_short | Experimental investigation on the effect of blending bituminous coal with pinus sawdust on combustion performance parameters |
| title_sort | experimental investigation on the effect of blending bituminous coal with pinus sawdust on combustion performance parameters |
| topic | Co-combustion Drop tube furnace Particle residence time Bituminous coal Pinus sawdust Particle temperature |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024033188 |
| work_keys_str_mv | AT garikaitmarangwanda experimentalinvestigationontheeffectofblendingbituminouscoalwithpinussawdustoncombustionperformanceparameters AT danielmmadyira experimentalinvestigationontheeffectofblendingbituminouscoalwithpinussawdustoncombustionperformanceparameters |