Material Balance with combustion reaction This problem asks you to examine the r
ID: 902768 • Letter: M
Question
Material Balance with combustion reaction
This problem asks you to examine the reaction network introduced in a previous practice problem encountered when we were solving single-unit reactive processes but now in the context of a more realistic process scenario. In the process depicted below to convert ethene to ethylene oxide the following two reactions occur: Rxn (1): CH4(g) + 1/2O2(g) Rightarrow C2H20(g) Rxn (2): C2H4(g) + 3 O2(g)Rightarrow2 CO2(g) + 2 H20(g) The desired product is C2H40. The reactor operates with a single-pass conversion for ethene of 30.0%, and the yield of the desired product, C2H40, is 20.0% (based on complete conversion according to Rxn (1) of the ethene actually fed to the reactor). The product from the separator contains 80.0% of the ethylene oxide, all of the water, and none of the other species in the reactor effluent. For the other stream leaving the separator 50.0% is purged, with the remaining 50.0% mixed with the fresh feed of 100.0 mol 2H4/min. Label the process flowchart with known and unknown process variables. Perform a degree-of-freedom analysis on the overall system and each subsystem to identify a solution strategy Solve the problem to determine the molar flow rate (in mol/min) of oxygen in the fresh feed, the overall and individual component molar flow rates (in mol/min) for the product and purge streams. Determine the overall percent conversion of ethene and selectivity for production of ethylene oxide vs. carbon dioxide.Explanation / Answer
Material Balance with combustion reaction This problem asks you to examine the r