Page 6 of 9 PROBLEM 5 (10 points) A manufacturing facility has two processes tha

Question

Page 6 of 9 PROBLEM 5 (10 points) A manufacturing facility has two processes that discharge CO2-containing gases to the atmosphere. Determine which of the two air streams has the larger annual emission of CO2, and what that emission rate is. Express your answer in metric tons CO2 per year. (Note: 1 metric ton 1,000 kg). Assume that both emissions are continuous-flow and steady-state Process B Gas flow 25 C 1.02 atm Process A Gas flow Gas Temperature335 K Pressure CO2 concentration Actual flow rate 1.05 atm 120,000 ppm, 4300 mg/m 95 m3/min 322 m/min

Explanation / Answer

Process 1

T = 335 K

P= 1.05 atm

V= 95 m3/min

conc = 120000 ppm

= 215951 mg/m3

actual mass of CO2 = 215951 mg/m3 * 95 m3/min

= 20515345 mg CO2/min

trial 2

T = 25 C= 398 K

P= 1.05 atm

V= 322 m3/min

Conc= 4300 mg/m3

mass of CO2 = 4300* 322

= 1384600 mg/min

clearly emission from process 1 > emissions from process 2

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