Generation of nitrous oxide and nitric oxide from char combustion
Conference
·
OSTI ID:357875
- Queen`s Univ., Kingston, Ontario (Canada). Dept. of Chemical Engineering
- Natural Resources Canada, Ottawa, Ontario (Canada). Energy Research Labs.
A single-particle model is presented for the distribution among N{sub 2}, NO and N{sub 2}O of char-bound nitrogen during combustion in a fluidized bed. The N{sub 2}O is produced in the gas phase from HCN released during combustion while NO is produced on the char surface. N{sub 2} accounts for the remaining nitrogen. The model incorporates the effects of ambient temperature and concentrations of O{sub 2} and NO. The model has been incorporated into a simple plug-flow reactor model for the freeboard of a bubbling FBC. The freeboard can be a region of significant (20--30%) generation of N{sub 2}O. This model is used to validate the particle model against data from a pilot-scale BFBC over a wide range of operating conditions, including superficial gas velocity (1.1 m/s to 2.5 m/s), bed temperature (780 C to 950 C), excess air ({minus}1% to 60%) and fuel type (sub-bituminous coal to coke). A good fit is obtained to measured axial concentration profiles of NO and N{sub 2}O in the freeboard.
- OSTI ID:
- 357875
- Report Number(s):
- CONF-9705116--; ISBN 0-7918-1557-9
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nitric oxide reduction in the freeboard of a fluidized bed coal combustor
Reaction of char nitrogen during fluidized bed coal combustion -- influence of nitric oxide and oxygen on nitrous oxide
A novel technique for simultaneous reduction of nitrous- and nitrogen oxides emissions from a bubbling fluidized-bed combustor
Conference
·
Thu Dec 31 23:00:00 EST 1981
· Symp. (Int.) Combust., (Proc.); (United States)
·
OSTI ID:5730135
Reaction of char nitrogen during fluidized bed coal combustion -- influence of nitric oxide and oxygen on nitrous oxide
Journal Article
·
Thu Mar 31 23:00:00 EST 1994
· Combustion and Flame; (United States)
·
OSTI ID:5141771
A novel technique for simultaneous reduction of nitrous- and nitrogen oxides emissions from a bubbling fluidized-bed combustor
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:288010