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Title: Reburning of Animal Waste Based Biomass with Coal for NOx Reduction, Part I: Feedlot Biomass (FB) and Coal:FB Blends

Journal Article · · Energies
DOI:https://doi.org/10.3390/en14238030· OSTI ID:1981127
 [1]; ORCiD logo [2];  [3];  [4];  [5]
  1. Texas A & M Univ., College Station, TX (United States); Research Institute of Industrial Science & Technology (RIST), Pohang (South Korea)
  2. Texas A & M Univ., College Station, TX (United States)
  3. Texas A & M Univ., College Station, TX (United States); Completion Engineering Advisors, LLC, Wylie, TX (United States)
  4. Texas A & M Univ., College Station, TX (United States); Scientific Applications & Research Associates, (SARA) Inc., Cypress, CA (United States)
  5. Texas A & M Univ., Amarillo, TX (United States)

Cattle biomass (CB or manure from cattle) is proposed as reburn fuel under slightly fuel-rich conditions. The CB includes wastes from cattle feedlots (cattle grown in feedlots to slaughter weights of 450–640 kg) termed as Feedlot Biomass (FB) and cattle wastes from dairy farms termed as Dairy Biomass (DB). NOx emissions from coal-fired power plants can be reduced by using pure CB and Coal:CB mixtures as reburn fuels (10~30% by heat) injected after the primary combustion region. Experiments with Coal:CB mixtures as reburn fuels were performed using the 30 kW burner facility. Part I deals with results from experiments using pure FB and Coal:FB blends as reburn fuels while Part II presents results on extent of NOx reduction using pure DB and Coal:DB blends as reburn fuels (RF). In the current work, results on NOx emission are presented with FB and Coal:FB blends as RF. The parametric studies include: equivalence ratio in reburn zone (ERRBZ), vitiated air, angle of reburn nozzles, presence and absence of heat exchangers (HEXs), and baseline NOx concentration. The optimum operating conditions for FB reburning were found to be conditions with vitiation at ERRBZ = 1.1 with 45° upward counter-current injection in the presence of HEXs. NOx emissions were reduced by as much as 96%.

Research Organization:
Texas A & M Univ., College Station, TX (United States). Texas A & M Engineering Experiment Station
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); Texas Commission on Environmental Quality
Grant/Contract Number:
FG26-00NT40810; FG36-05GO85003; 582-5-65591 0015
OSTI ID:
1981127
Journal Information:
Energies, Vol. 14, Issue 23; ISSN 1996-1073
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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