4B The dehydration butanol of alumina is carried out over a silica-alumina catalyst at 680K. CH3CH2CH2CH2OHcatCH3CH=CHCH3+H2O The rate law is rBu=(1+KBuPBu)2kPBu with k=0.054mol/gcatgatm and KBu=0.32atm1. Pure butanol enters a thin-tubed, packed-bed reactor at a molar flow rate of 50kmol/hr and a pressure of 10atm(1013kPa). (a) What PBR catalyst weight is necessary to achieve 80% conversion in the absence of pressure drop? Plot and analyze X,p,f (i.e., (v/v0)) and reaction rate, rA, as a function of catalyst weight. (b) What "fluidized CSTR" catalyst weight is necessary to achieve 80% conversion? (c) Repeat (a) when there is pressure drop, with the pressure-drop parameter =0.0006kg1. Do you observe a maximum in the rate of reaction, and if so, why? What catalyst weight is necessary to achieve 70% conversion? Compare this weight with that for no pressure drop to achieve the same conversion. (d) What generalizations can you make about this problem? (e) Write a question for this problem that requires critical thinking and then explain why your question requires critical thinking. (Hint: See Preface Section I.2)