Fuel-Lean Gas Reburning(TM) (FLGR) is a method of controlling NO x emissions produced during coal combustion in utility boilers by injecting natural gas into the boiler downstream of the primary combustion zone. Whereas traditional reburning requires 10%--20% of the total energy input from the reburn fuel followed by over-fire air to complete combustion of fuel fragments, FLGR uses only 5%--10% of the total energy input from the reburn fuel. Because less fuel is used, the overall environment in the boiler remains fuel-lean, with only localized eddies that are fuel-rich, where the NOx reduction takes place. FLGR does not require over-fire air to complete the combustion of fuel fragments. Fuel-lean biomass reburning is a variation of FLGR that uses biomass instead of natural gas as the reburn fuel.;The goal of this work was to simulate a coal-fired utility boiler in an experimental down-flow reactor, and evaluate the influence of several variables, including the initial oxygen concentration, the type of biomass used, the % energy input from biomass, and the type of carrier gas used for injecting the biomass into the reactor.
","abstract_html":"<p>Fuel-Lean Gas Reburning(TM) (FLGR) is a method of controlling NO x emissions produced during coal combustion in utility boilers by injecting natural gas into the boiler downstream of the primary combustion zone. Whereas traditional reburning requires 10%--20% of the total energy input from the reburn fuel followed by over-fire air to complete combustion of fuel fragments, FLGR uses only 5%--10% of the total energy input from the reburn fuel. Because less fuel is used, the overall environment in the boiler remains fuel-lean, with only localized eddies that are fuel-rich, where the NOx reduction takes place. FLGR does not require over-fire air to complete the combustion of fuel fragments. Fuel-lean biomass reburning is a variation of FLGR that uses biomass instead of natural gas as the reburn fuel.;The goal of this work was to simulate a coal-fired utility boiler in an experimental down-flow reactor, and evaluate the influence of several variables, including the initial oxygen concentration, the type of biomass used, the % energy input from biomass, and the type of carrier gas used for injecting the biomass into the reactor.</p>","abstract_has_math":false,"creators":["Sweterlitsch, Jeffrey"],"institution":null,"degree_name":"Doctor of Philosophy","degree_level":"dissertation","degree_discipline":null,"degree_department":"Department of Chemical and Biological Engineering","school":null,"contributors":[],"advisors":["Robert C. Brown"],"committee_chairs":[],"committee_members":[],"year":2002,"date_issued":"2002-01-01","date_published":"2002-01-01","updated_at":"2026-07-24T02:38:34Z","subjects":[],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.doi","label":"DOI","values":["https://doi.org/10.31274/rtd-180813-11854"],"render_values":[{"text":"https://doi.org/10.31274/rtd-180813-11854","href":"https://doi.org/10.31274/rtd-180813-11854","code":true}]},{"key":"dc:identifier","label":"Identifier","values":["archive/lib.dr.iastate.edu/rtd/484/"],"render_values":[{"text":"archive/lib.dr.iastate.edu/rtd/484/","href":null,"code":true}]}]},"links":{"outbound_url":"https://dr.lib.iastate.edu/handle/20.500.12876/77518","outbound_label":"Repository record","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Robert C. Brown"]},{"key":"dc:contributor.department","label":"Department","values":["Department of Chemical and Biological Engineering"]},{"key":"dc:creator","label":"Author","values":["Sweterlitsch, Jeffrey"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-08-24T21:58:32.000"]},{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2020-07-02T05:44:55Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2020-07-02T05:44:55Z"]},{"key":"dc:date.issued","label":"Date","values":["2002-01-01"]},{"key":"dc:type","label":"Dc Type","values":["dissertation"]},{"key":"thesis:degree_level","label":"Degree Level","values":["dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["archive/lib.dr.iastate.edu/rtd/484/"]},{"key":"dc:identifier.doi","label":"DOI","values":["https://doi.org/10.31274/rtd-180813-11854"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://dr.lib.iastate.edu/handle/20.500.12876/77518"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Fuel-Lean Gas Reburning(TM) (FLGR) is a method of controlling NO x emissions produced during coal combustion in utility boilers by injecting natural gas into the boiler downstream of the primary combustion zone. Whereas traditional reburning requires 10%--20% of the total energy input from the reburn fuel followed by over-fire air to complete combustion of fuel fragments, FLGR uses only 5%--10% of the total energy input from the reburn fuel. Because less fuel is used, the overall environment in the boiler remains fuel-lean, with only localized eddies that are fuel-rich, where the NOx reduction takes place. FLGR does not require over-fire air to complete the combustion of fuel fragments. Fuel-lean biomass reburning is a variation of FLGR that uses biomass instead of natural gas as the reburn fuel.;The goal of this work was to simulate a coal-fired utility boiler in an experimental down-flow reactor, and evaluate the influence of several variables, including the initial oxygen concentration, the type of biomass used, the % energy input from biomass, and the type of carrier gas used for injecting the biomass into the reactor.
"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Biomass reburning for control of nitrogen oxides"]}]}],"canonical_facts":{"dc:contributor.advisor":["Robert C. Brown"],"dc:contributor.department":["Department of Chemical and Biological Engineering"],"dc:creator":["Sweterlitsch, Jeffrey"],"dc:date":["2018-08-24T21:58:32.000"],"dc:date.accessioned":["2020-07-02T05:44:55Z"],"dc:date.available":["2020-07-02T05:44:55Z"],"dc:date.issued":["2002-01-01"],"dc:description.abstract":["Fuel-Lean Gas Reburning(TM) (FLGR) is a method of controlling NO x emissions produced during coal combustion in utility boilers by injecting natural gas into the boiler downstream of the primary combustion zone. Whereas traditional reburning requires 10%--20% of the total energy input from the reburn fuel followed by over-fire air to complete combustion of fuel fragments, FLGR uses only 5%--10% of the total energy input from the reburn fuel. Because less fuel is used, the overall environment in the boiler remains fuel-lean, with only localized eddies that are fuel-rich, where the NOx reduction takes place. FLGR does not require over-fire air to complete the combustion of fuel fragments. Fuel-lean biomass reburning is a variation of FLGR that uses biomass instead of natural gas as the reburn fuel.;The goal of this work was to simulate a coal-fired utility boiler in an experimental down-flow reactor, and evaluate the influence of several variables, including the initial oxygen concentration, the type of biomass used, the % energy input from biomass, and the type of carrier gas used for injecting the biomass into the reactor.
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