Abstract
Air staging is a well-known effective method to control NOx emissions from solid fuel combustion boilers. However, further research is still needed to clarify the effect of air staging at different injection locations on the gaseous emissions of Fluidised Bed Combustion (FBC) boilers that fire 100% biomass fuels, particularly non-woody biomass fuels. The main objective of this work is to investigate the effect of the staging air injection location on the gaseous emissions (NOx and CO) and temperature profiles of a 20 kWth bubbling fluidised bed combustor firing three non-woody (straw, miscanthus and peanuts) and two woody biomass fuels. The experimental results showed that injecting the secondary air at the higher location could lead to a greater NOx reduction due to the fact that the biomass combustion reaction mainly took place in the splash zone and/or beginning of the freeboard. Up to 30% of NOx reduction, compared with no air staging, was achieved for the non-woody fuels when the staging air was injected at the higher-location. Air staging also significantly reduced the CO emissions as a result of the higher temperatures in the freeboard and longer residence time in the primary combustion zone.
| Original language | English |
|---|---|
| Pages (from-to) | 2069-2080 |
| Number of pages | 12 |
| Journal | Energy |
| Volume | 141 |
| Early online date | 21 Nov 2017 |
| DOIs | |
| Publication status | Published - 15 Dec 2017 |
| Externally published | Yes |
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Keywords
- Air staging
- Biomass fuels
- Bubbling fluidised bed combustor
- CO emission
- NOx emission
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Pollution
- Energy(all)
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering
Cite this
Experimental investigation of woody and non-woody biomass combustion in a bubbling fluidised bed combustor focusing on gaseous emissions and temperature profiles. / Sher, Farooq; Pans, Miguel A.; Afilaka, Daniel T.; Sun, Chenggong; Liu, Hao.
In: Energy, Vol. 141, 15.12.2017, p. 2069-2080.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Experimental investigation of woody and non-woody biomass combustion in a bubbling fluidised bed combustor focusing on gaseous emissions and temperature profiles
AU - Sher, Farooq
AU - Pans, Miguel A.
AU - Afilaka, Daniel T.
AU - Sun, Chenggong
AU - Liu, Hao
PY - 2017/12/15
Y1 - 2017/12/15
N2 - Air staging is a well-known effective method to control NOx emissions from solid fuel combustion boilers. However, further research is still needed to clarify the effect of air staging at different injection locations on the gaseous emissions of Fluidised Bed Combustion (FBC) boilers that fire 100% biomass fuels, particularly non-woody biomass fuels. The main objective of this work is to investigate the effect of the staging air injection location on the gaseous emissions (NOx and CO) and temperature profiles of a 20 kWth bubbling fluidised bed combustor firing three non-woody (straw, miscanthus and peanuts) and two woody biomass fuels. The experimental results showed that injecting the secondary air at the higher location could lead to a greater NOx reduction due to the fact that the biomass combustion reaction mainly took place in the splash zone and/or beginning of the freeboard. Up to 30% of NOx reduction, compared with no air staging, was achieved for the non-woody fuels when the staging air was injected at the higher-location. Air staging also significantly reduced the CO emissions as a result of the higher temperatures in the freeboard and longer residence time in the primary combustion zone.
AB - Air staging is a well-known effective method to control NOx emissions from solid fuel combustion boilers. However, further research is still needed to clarify the effect of air staging at different injection locations on the gaseous emissions of Fluidised Bed Combustion (FBC) boilers that fire 100% biomass fuels, particularly non-woody biomass fuels. The main objective of this work is to investigate the effect of the staging air injection location on the gaseous emissions (NOx and CO) and temperature profiles of a 20 kWth bubbling fluidised bed combustor firing three non-woody (straw, miscanthus and peanuts) and two woody biomass fuels. The experimental results showed that injecting the secondary air at the higher location could lead to a greater NOx reduction due to the fact that the biomass combustion reaction mainly took place in the splash zone and/or beginning of the freeboard. Up to 30% of NOx reduction, compared with no air staging, was achieved for the non-woody fuels when the staging air was injected at the higher-location. Air staging also significantly reduced the CO emissions as a result of the higher temperatures in the freeboard and longer residence time in the primary combustion zone.
KW - Air staging
KW - Biomass fuels
KW - Bubbling fluidised bed combustor
KW - CO emission
KW - NOx emission
UR - http://www.scopus.com/inward/record.url?scp=85036455255&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2017.11.118
DO - 10.1016/j.energy.2017.11.118
M3 - Article
VL - 141
SP - 2069
EP - 2080
JO - Energy
JF - Energy
SN - 0360-5442
ER -