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NO emission during co-firing coal and biomass in an oxy-fuel circulating fluidized bed combustor
| Content Provider | Semantic Scholar |
|---|---|
| Author | Duan, Lunbo Duan, Yuanqiang Zhao, Changsui Anthony, Edward John |
| Copyright Year | 2015 |
| Abstract | Abstract Co-firing biomass and coal under oxy-fuel combustion in a circulating fluidized bed combustor (CFBC) holds the potential for negative CO 2 emission into the atmosphere and is a promising technology to realized atmospheric CO 2 reduction. Experiments co-firing coal and three kinds of Chinese biomass, i.e. rice husk (RH), wood chips (WC) and dry wood flour (WF) under oxy-fuel condition were carried out in a 10 kWt CFBC. Results show that burning biomass separately produces higher NO emissions and a higher fuel nitrogen conversion ratio than burning coal without biomass addition due to the higher volatile matter content of the biomass; the fuel nitrogen conversion ratio is in agreement with the H/N ratio in the fuel under both air and oxy-fuel atmosphere. In oxy-fuel combustion, lower NO emission is observed than in air combustion, because CO 2 replacing N 2 reduces the yield of NO precursors like NH 3 during the devolatilization process and enhances NO reduction via char/NO/CO reaction. NO emission increases as temperature, overall oxygen concentration and primary oxidant fraction increase during oxy-fuel combustion. Oxygen staging succeeds in controlling NO emission in a comparatively low level at high overall oxygen concentration condition. The results can be helpful for the design and operation of the oxy-fuel fluidized bed combustor. |
| Starting Page | 8 |
| Ending Page | 13 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.fuel.2015.01.110 |
| Volume Number | 150 |
| Alternate Webpage(s) | http://pdf-s3.xuebalib.com:1262/7jck5OgWmSPH.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.fuel.2015.01.110 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
