dc.contributor.author |
Mathekga, HI
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dc.contributor.author |
Oboirien, BO
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|
dc.contributor.author |
Engelbrecht, A
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dc.contributor.author |
North, Brian C
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dc.contributor.author |
Premlal, K
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dc.date.accessioned |
2017-02-23T09:41:33Z |
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dc.date.available |
2017-02-23T09:41:33Z |
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dc.date.issued |
2016-07 |
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dc.identifier.citation |
Mathekga, I., Oboirien, B.O., Engelbrecht, A., North, B.C. and Premlal, K. 2016. Performance evaluation of South African coals under oxy-fuel. Energy and Fuels, 30(8), pp 6756–6763 |
en_US |
dc.identifier.issn |
0887-0624 |
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dc.identifier.uri |
http://pubs.acs.org/doi/abs/10.1021/acs.energyfuels.6b00430
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dc.identifier.uri |
http://hdl.handle.net/10204/8937
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dc.identifier.uri |
https://doi.org/10.1021/acs.energyfuels.6b00430
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|
dc.description |
Copyright: 2016 American Chemical Society. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Energy and Fuels, 30(8), 6756–6763 |
en_US |
dc.description.abstract |
In this study, the experimental results of the oxy-fluidized combustion of three different South African coals (sub-bituminous) are presented. The coal samples were denoted Coal A, B, and C. Three combustion atmospheres—air, oxy (21% O(sub2)/79% CO(sub2)), and oxy (30% O(sub2)/70% CO(sub2))—were studied. A total of 18 tests were conducted in a bubbling fluidized bed reactor at 850 and 925 °C. The results obtained showed that the highest carbon burnout was obtained at 30% O2/CO(sub2), followed by air, and last at 21% O2/CO(sub2). Coals A and B had a higher carbon burnout than Coal C. There was a marginal difference of 1% in the carbon burnout for both Coals A and B in all the conditions except at 21% O(sub2)/CO(sub2) at 925 °C, when the carbon burnout of Coal A was 5% higher than that of Coal B. Carbon burnout in Coal C was about 20% lower than those of Coals A and B. Carbon burnout had a good correlation with the char particle temperature at all the combustion conditions studied for the three coals. The carbon burnout only had a good correlation with the vitrinite random reflectance at 21% O(sub2)/CO(sub2) at 925 °C for the three coals. The highest char particle temperature (1250 K) was obtained in Coal B at 30% oxy-combustion (30% O(sub2)/CO(sub2)) at a 925 °C bed temperature, and it had the highest carbon burnout of 99.34%. The lowest char particle particle temperature (1167 K) was obtained in Coal C at 21% oxy-combustion (21% O(sub2)/CO(sub2)) at a 850 °C bed temperature, and it had the lowest carbon burnout of 65.81%. There was a higher fuel-nitrogen conversion in air combustion than in oxy-fuel combustion than for all the coals. Fuel-S conversion ratios to SOx indicated that air combustion had relatively higher conversions than oxy-fuel, with the highest conversion of 35% observed for Coal A at 925 °C. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
American Chemical Society |
en_US |
dc.relation.ispartofseries |
Wokflow;17798 |
|
dc.subject |
South African coals |
en_US |
dc.subject |
Combustion atmospheres |
en_US |
dc.subject |
Energy |
en_US |
dc.subject |
Fuels |
en_US |
dc.title |
Performance evaluation of South African coals under oxy-fuel |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Mathekga, H., Oboirien, B., Engelbrecht, A., North, B. C., & Premlal, K. (2016). Performance evaluation of South African coals under oxy-fuel. http://hdl.handle.net/10204/8937 |
en_ZA |
dc.identifier.chicagocitation |
Mathekga, HI, BO Oboirien, A Engelbrecht, Brian C North, and K Premlal "Performance evaluation of South African coals under oxy-fuel." (2016) http://hdl.handle.net/10204/8937 |
en_ZA |
dc.identifier.vancouvercitation |
Mathekga H, Oboirien B, Engelbrecht A, North BC, Premlal K. Performance evaluation of South African coals under oxy-fuel. 2016; http://hdl.handle.net/10204/8937. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Mathekga, HI
AU - Oboirien, BO
AU - Engelbrecht, A
AU - North, Brian C
AU - Premlal, K
AB - In this study, the experimental results of the oxy-fluidized combustion of three different South African coals (sub-bituminous) are presented. The coal samples were denoted Coal A, B, and C. Three combustion atmospheres—air, oxy (21% O(sub2)/79% CO(sub2)), and oxy (30% O(sub2)/70% CO(sub2))—were studied. A total of 18 tests were conducted in a bubbling fluidized bed reactor at 850 and 925 °C. The results obtained showed that the highest carbon burnout was obtained at 30% O2/CO(sub2), followed by air, and last at 21% O2/CO(sub2). Coals A and B had a higher carbon burnout than Coal C. There was a marginal difference of 1% in the carbon burnout for both Coals A and B in all the conditions except at 21% O(sub2)/CO(sub2) at 925 °C, when the carbon burnout of Coal A was 5% higher than that of Coal B. Carbon burnout in Coal C was about 20% lower than those of Coals A and B. Carbon burnout had a good correlation with the char particle temperature at all the combustion conditions studied for the three coals. The carbon burnout only had a good correlation with the vitrinite random reflectance at 21% O(sub2)/CO(sub2) at 925 °C for the three coals. The highest char particle temperature (1250 K) was obtained in Coal B at 30% oxy-combustion (30% O(sub2)/CO(sub2)) at a 925 °C bed temperature, and it had the highest carbon burnout of 99.34%. The lowest char particle particle temperature (1167 K) was obtained in Coal C at 21% oxy-combustion (21% O(sub2)/CO(sub2)) at a 850 °C bed temperature, and it had the lowest carbon burnout of 65.81%. There was a higher fuel-nitrogen conversion in air combustion than in oxy-fuel combustion than for all the coals. Fuel-S conversion ratios to SOx indicated that air combustion had relatively higher conversions than oxy-fuel, with the highest conversion of 35% observed for Coal A at 925 °C.
DA - 2016-07
DB - ResearchSpace
DP - CSIR
KW - South African coals
KW - Combustion atmospheres
KW - Energy
KW - Fuels
LK - https://researchspace.csir.co.za
PY - 2016
SM - 0887-0624
T1 - Performance evaluation of South African coals under oxy-fuel
TI - Performance evaluation of South African coals under oxy-fuel
UR - http://hdl.handle.net/10204/8937
ER -
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en_ZA |