Question

7. Given: Natural gas (CH4) must have the hydrogen sulfide (H2S) removed before it is burned. One way to do this is to pass the natural gas through a bed of zinc oxide (ZnO) (molecular weight of 81, density of 1.11 g/cm3), where following reaction takes place. Outflow ZnO + H2S ? ZnS + H2O You have 1 million standard cubic feet of natural gas per day at 492R and 1 atm with 0.82 mol% H2S. You need to design a vessel to hold the ZnO. You want to remove and discard the ZnO only once per day. You can assume CH4 behaves idealy (PV-nRT) 20 pts total Find: a) How much ZnO (lbs) is required? (10 pts) b) How large is the vessel (in liters) to hold this amount of Zno (You can ignore the shape of the ZnO particles.)? (5 pts) c) How much water must be removed (kg/day)? (5 pts) Mac Inflow

Answer 1

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