A midsize steam-methane reforming plant is consuming methane at a rate of 125,000 mol/h and converting it into synthesis gas, which is a mixture of H2 and CO. The methane is being fed into the process at an absolute pressure of 233 psi and a temperature of 723 K.   a.Estimate the volumetric flow rate of methane entering the steam-methane reforming facility in m3/h. (Do not assume ideal gas).  b. If you could assume ideal gas, what would be the percent error between the ideal gas solution for volumetric flow rate and the solution to part a?

A7.

A gas tank (volume V = 40 m³) contains ethylene (M = 28 kg/kmol, viscosity u = 1.1-10-4Pa-s) initially at pressure po = 30 - 105Pa and temperature T = 200 K and connected through a long pipe (L = 1500 m, dia- meter d = 0.2 m) to a reactor operating at atmospheric pressure. 1. calculate the flow rate fed to the reactor when the valve placed at the pipe inlet is opened (assume isothermal transformations and f = 0.003); 2. calculate the time needed to halve the pressure in the tank; 3. determine the mass of gas discharged from the tank up to that time. which allow to dispose the condensate by gravity at the bottom of the stack.

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