A. Reduced NOx formation in flue gas
B. Lower furnace operating temperature
C. High heat transfer rate
D. All A., B. & C.
Related Mcqs:
- Which of the following is not applicable to fluidised bed combustion of coal ?
A. It cannot burn low grade coal
B. It achieves higher fuel combustion efficiency
C. Less heat transfer surface area is required in boilers
D. None of these - Use of excess of combustion air in the combustion of fuels results in__________________?
A. Heat losses
B. Long flame
C. Condensation of water vapour from the fuel gas
D. None of these - Deficiency of combustion air during combustion of a gaseous fuel_____________________?
A. Lengthens the flame
B. Causes heat loss of fuel by its partial combustion
C. Both A. & B.
D. Shortens the flame - Presence of nitrogen in combustion air does not reduce the ____________________?
A. Amount of heat liberated
B. Flame temperature
C. Flue gas temperature
D. Any of the above - The internal energy of the combustion products is ____________________ compared to that of reactants?
A. More
B. Less
C. Equal
D. More or less; (depends on the state of fuel.) - Lurgi coal gasifier is a pressurised ______________ bed reactor?
A. Moving
B. Fixed
C. Fluidised
D. Entrained - Which of the following is a single stage, fixed bed high pressure coal gasification process ?
A. Winkler process
B. Kopper-Totzek process
C. Lurgi Process
D. None of these - Steam is intermittently admitted into the fuel bed during the production of producer gas to__________________?
A. Convert CO to CO2
B. Increase the combustion rate
C. Increase the gas production rate
D. Minimise the chances of clinker formation - Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an ______________ bed gasifier?
A. Entrained
B. Moving
C. Fixed
D. Fluidised - During combustion of gaseous fuels, deficiency of air_________________?
A. Lengthens the flame
B. Tends to shorten the flame
C. Does not affect the flame length
D. Increases the flame temperature
