You wish to design a system to produce compressed gas; the gas will be used in a manufacturing process. The process requires that the compressed gas has no oxygen in it, either in the form of oxygen...

You wish to design a system to produce compressed gas; the gas will be used in a manufacturing process. The process requires that the compressed gas has no oxygen in it, either in the form of oxygen molecules or in the form of oxygen atoms in other compounds. In addition, the process requires that the concentration of CH₄
be at least 20% but no more than 40% (by volume). The compressor system must produce 0.25 kg/s of gas for the process at a temperature of 50°C and a pressure of 700 kPa. The isentropic efficiency of the compressor is 0.75. Assume that the gases used in the compressor enter at 25°C and 100 kPa. Choose a mixture of gases that meets these requirements, and design a compressor and cooling system to meet the process needs. Analyze the current cost of operating such a system.