1 –
Calculate the adiabatic flame temperature of propane combustion
with 50% excess air.
2– Use
an online adiabatic flame calculator to calculate the adiabatic
flame temperature of propane with
air in increments of 0.1 equivalence ratio from 0.5 to 1.2. Plot
your results and determine the point that the flame has the maximum
T. Compare your results with that of Problem
1.
the adiabatic flame temperature (theoretical maximum temperature)
of black coal in air is over 2000oC. If the ambient
temperature is 20oC then the theoretical maximum
efficiency of a coal fired power station is approximately 87%.
Why then is the efficiency of even the best coal fired power
stations less than 50%.
For a constant-volume stoichiometric propane-air mixture
initially at 298K, determine the adiabatic flame temperature and
final pressure assuming constant specific heats evaluated at
298K.
Find the adiabatic flame temperature for complete combustion
with 130% theoretical air for pentane. (The pentane and air enter
at standard reference conditions.)
When a hydrocarbon burns with 300% of theoretical air, is the
adiabatic flame temperature higher than, lower than, or equal to
the adiabatic flame temperature when it burns with 100% of
theoretical air? Why? Note: You must correctly explain your
reasoning to receive credit for this problem.
1. Calculate the adiabatic flame temperature for the following
mixtures initially at 298 K: stoichiometric butane-air mixture,
stoichiometric butane-oxygen mixture, 2.0% (by volume) of butane in
air. Use enthalpies of formation and heat capacities from the NIST
Chemistry WebBook, which can be found at
http://webbook.nist.gov/chemistry/.
2) Repeat the adiabatic flame temperature calculation without the
restriction on the possible products using an online version of the
CEA calculator developed by NASA and located at
http://www.grc.nasa.gov/WWW/CEAWeb/ceaHome.htm. Compare the results
of the two...
Calculate the adiabatic flame temperature for the following
mixtures initially at 298 K: stoichiometric butane-air mixture,
stoichiometric butane-oxygen mixture, 2.0% (by volume) of butane in
air. Calculate without the
restriction on the possible products using an online version of the
CEA calculator developed by NASA and located
athttp://www.grc.nasa.gov/WWW/CEAWeb/ceaHome.htm. Compare the
results of the two calculations and explain possible
differences.
Calculate the theoretical flame temperature for CO gas burned
at constant pressure with 100% excess air, when the reactants enter
at 100°C.
Please show work, do not copy the
solution founded. show your solution! if you can not answer this
question, then do not attempt to copy others' work.