A large-bore two-stroke stationary engine uses an ammonia injection system to remove NO from the...

Question

A large-bore two-stroke stationary engine uses an ammonia injection system to remove NO from the
exhaust. The engine has a displacement of 300 L and speed of 400 rpm. It is fueled with methane,
operates lean at an equivalence ratio of 0.80, and has a delivery ratio of 0.92. If 0.1% of the nitrogen
entering the exhaust has been converted to NO during the combustion process, what is the mass flow
(kg/h) of ammonia needed to reduce the NO to N2?
Solution:
Given data:
Displacement volume of engine = 300 L
Speed of engine = 400 rpm
Total volume flow rate of gas per minute = 300 * 400 = 120000 L/min
This volume flow rate is a mixture of fuel and air.
Now analysis...

Robert · Accepted Answer

A large-bore two-stroke stationary engine uses an ammonia injection system to remove NO from the 
exhaust. The engine has a displacement of 300 L and speed of 400 rpm. It is fueled with methane, 
operates lean at an equivalence ratio of 0.80, and has a delivery ratio of 0.92. If 0.1% of the nitrogen 
entering the exhaust has been converted to NO during the combustion process, what is the mass flow 
(kg/h) of ammonia needed to reduce the NO to N2? 

Solution: 
Given data: 
Displacement volume of engine = 300 L 
Speed of engine = 400 rpm 
Total volume flow rate of gas per minute = 300 * 400 = 120000 L/min 
This volume flow rate is a mixture of fuel and air.

A large-bore two-stroke stationary engine uses an ammonia injection system to remove NO from the exhaust. The engine has a displacement of 300 L and speed of 400 rpm. It is fueled with methane,...

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