CHM ENG 142 Midterm: cheme142-sp2009-mt1-Iglesia-soln
8 Jan 2019
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Low = 16 y c n e u q e r. Problem 2 (a) species a is the limiting reactant. We can show this by assuming all of a reacts to determine if any b remains. v. 1 min b mol remain (b) pfr balance in out + gen = acc. Because 60% of the flow is going to the pfr. Or, we could do a weighted average of the conversions. =bx (e) (i) we can find the new conversion by recalculating the value for the concentrations. Substitute our new expressions for concentration into our rate expression from (c) Substitute expressions for [i1] and [i2] into rate expression and simplify: r. 2 which occurs when step 1 is quasi-equilibrated (qe). (i) if step 1 is irreversible: r. 1 (ii) if step 1 is quasi-equilibrated: r. Determine the dependence of selectivity towards the desired product on the concentration of reactants and products:
