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Problem 14.14: (Fall 2001) The gas-phase dehydrogenation of propane is carried out according to the reaction C3 H8 (g) = C3 H6 (g) + H2 (g). The reaction takes place in the presence of a catalyst in an isothermal reactor that is maintained at 5 bar. a) Calculate the equilibrium constant at 25 °C. b) Calculate the standard enthalpy of reaction at 25 °C. Is the reaction exothermic or endothermic? c) The reactor feed contains pure propane. If the desired conversion of propane is 95%, at what temperature should you run the reaction? Assume the reaction reaches equilibrium. d) Due to upstream process modifications, the reactor feed has now changed from pure propane into a mixture that contains 50% nitrogen (by mol). If the reactor pressure remains at 5 bar, how should you adjust the temperature to achieve 95% conversion? e) Just as you finished adjusting the temperature to handle the propane/nitrogen feed of the previous part, the compressor malfunctions and the reactor pressure drops to 1 bar. How should you adjust the temperature to achieve 95% conversion? f) Clearly state all the assumptions.
Handling operations for solid/powder substances are often a source of dust generation and are a source of exposure to hazardous substances in industries. Describe in details the measures that can be taken to prevent exposure during the following s..
1) Calculate the quantity of pure make up oxygen to be supplied, (in kg/h), in steady state operation.
design a heat exchanger for the following dutyreduced crude oil leaving a distillation unit with a flow rate of 3166.04
If you dropped in a piece of magnesium, the magnesium would disappear and hydrogen gas would be released. Represent this change using symbols for the elements, and write out the balanced equation.
question 1a the radiation protection act 2003 makes provisions for the protection of people against the risks from
A typical feed stream composition is 55% ethylene, 5% inserts, and 40% water. A typical product stream is 52.26% ethylene, 5.49% ethanol, 0.16% ether, 36.81% water, and 5.28% inserts. Calculate the selectivity of ethylene for ethanol and for ether..
The March 1979 accident at the Three Mile Island nuclear plant occurred due to a series of operator errors and equipment failures, which reduced the flow of cooling water to the reactor core. As a result, the water began to boil and the core reached ..
Write a differential mole balance on phosphoric acid and provide an initial condition. [Start by defining np (k mol) to be the total quantity of phosphoric acid in the tank at any time.]
Write an essay on the replacement of metallic automobile components by polymers and composite materials. Address the following issues:
How might the CHPL be utilized by a health care informatics professional who is considering the purchase of an EHR for an ambulatory practice and What additional resources would you suggest?
A strap, instrumented to measure stretch, is worn around the chest to detect respiration whilst a subject is at-rest. The resulting signal is contaminated by electrical noise from the mains at 50 Hz with a similar amplitude to the respiration sign..
Assume that losses cannot be offset against revenues from other operations for tax purposes (i.e., no tax credits in years when the plant makes a loss). Estimate the following:
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