HW4 - University of California Santa Barbara Department of...

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Exit Gas W (lb-mol) 9.31 mol% water University of California – Santa Barbara Department of Chemical Engineering ChE10: Introduction to Chemical Engineering Professor Mike Gordon, Fall 2009 Homework #4 : due Friday 6 Nov. 09 Note : this homework assignment counts double. (1) Hot gas from a furnace is used to dry rice. The flow sheet and known data are presented below. What is the amount of recycle gas (in lb-mol) per 100 lbs of product, P, if the concentration of water in the gas stream entering the dryer is 5.20 mol%? Show all work and balances. Assume that the molecular weight of the hot gas is 29 lb m /lbmol. (2) Fritz Haber (Nobel prize in Chemistry-1918) and Karl Bosch (chemical engineer, Nobel prize in Chemistry-1931) developed a large-scale, high-pressure process to synthesize ammonia using an iron catalyst. This process is still used today in industry. N 2 + 3H 2 2NH 3 One ‘problem’ associated with the Bosch-Haber process is the very low single pass conversion in the reactor; as such, large amounts of recycle are required to boost ammonia production. Analyze the Bosch-Haber process in the following context:
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This note was uploaded on 01/05/2010 for the course CHE CH E 10 taught by Professor Gordon during the Fall '09 term at UCSB.

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HW4 - University of California Santa Barbara Department of...

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