A chemical plant produces oxygen by liquefying air and separating it into its component gases by fractional
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A chemical plant produces oxygen by liquefying air and separating it into its component gases by fractional distillation. The purity of the oxygen is a function of the main condenser temperature and the pressure ratio between the upper and lower columns. Current operating conditions are temperature (????1) = −200∘C and pressure ratio (????2) = 1.2.
Using the following data, find the path of steepest ascent:
Temperature (????1) Pressure Ratio (????2) Purity
−225 1.1 82.8
−225 1.3 83.5
−215 1.1 84.7
−215 1.3 85.0
−220 1.2 84.1
−220 1.2 84.5
−220 1.2 83.9
−220 1.2 84.3
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