Contoh Soal Azaz Teknik Kimia - 1

8.12    Ammonia is a gas for which reliable analytical methods are available to determine its concentration in other gases. To measure flow in a natural gas pipeline, pure ammonia gas is injected into the pipeline at a constant rate of 72.3 kg/min for 12 min. Five miles downstream from the injection point, the steady-state amonnia concetration is found to be 0.382 weight percent. The gas upstream from the point of ammonia ijection contains no measurable ammonia. How many kilograms of natural gas are flow ing through the pipelines per hour?

Penyelesaian :

 

PIPELINE

                                  NG                                                                                                  0.382 %

                                  0%                                                                                         99,618 % NG

 100%

B72,3 kg/min

A+B=C

A .  +  . B     = C.

0 + 72,3 . 1            = (72,3 + NG). 0,80382

72.3 – 0.276186 = 0.00382 NG

72,023814            = 0.00382 NG

                        NG  = 18854,48157

                                 = 1,31264,094