Title:
Spray Combustion Characteristics and Emissions of Biomass Fast Pyrolysis Liquid (Bio-Oil) in a Swirl Stabilized Burner
Author(s):
Tzanetakis, T., Farra, N., Moloodi, S., McGrath, A., Thomson, M.J.
Document(s):
Paper
Abstract:
Biomass fast pyrolysis liquid (or bio-oil) is a cellulose based alternative fuel with the potential to displace fossil fuels in stationary heat and power applications. To better understand the combustion behaviour and emissions of bio-oil, a 10 kW spray burner was designed and constructed. The effect of swirl, ignition source energy, atomization quality, air/fuel preheat and equivalence ratio on the stability and emissions of bio-oil spray flames was investigated. Since the fuel is not fully distillable, it is important to have good atomization, thorough mixing and increased recirculation to promote the burnout of non-volatile material and decrease CO emissions. Air and fuel preheat are also important for reducing emissions, although subsequent fuel boiling should be avoided in order to maintain flame stability. The amount of swirl and atomizing air that can be used to improve turbulence, mixing, droplet burnout and overall combustion quality is limited by the low volatility and tighter blow-out limits associated with bio-oil. The NOx produced in these flames is dominated by the conversion of fuel bound nitrogen. In order to reduce these emissions without refining the fuel, the use of staged combustion is recommended.
Keywords:
combustion, emissions, NOx emission, pyrolysis oil, liquid biofuels
Topic:
Industrial demonstration and market implementation
Subtopic:
Biomass fuels for heat and CHP (session 1)
Event:
18th European Biomass Conference and Exhibition
Session:
OD6.5
Pages:
1910 - 1920
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-OD6.5
Price:
FREE
