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[求助]
由于剛學工程不久，求解兩道化工外文題目
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Question 1 Compound A undergoes a reversible isomerization reaction over a supported metal catalyst. A⇆B Under pertinent conditions A and B are liquid, miscible and are of nearly identical density; the equilibrium constant for the reaction (in concentration units) is 5.8. In a fixed bed isothermal flow reactor in which back mixing is negligible (i.e. plug flow), a feed of pure A undergoes a net conversion to B of 55%. The reaction is elementary. If a second identical flow reactor at the same temperature is placed downstream from the first what overall conversion of A would you accept if: a)The reactors are directly connected in series? b)The products from the first reactor are separated by appropriate processing and only the uncovered A is fed to second reactor? Question 2The following reversible gas phase reaction follows an elementary rate law and is carried out isothermally at 325 K in a packed bed reactor. The two feed streams to the reactor mix to form a single feed stream that is equal molar in A and B (5 mol/s) with total volumetric flow rate of 60 dm3/s. (a)Calculate the maximum conversion that can be accomplished by the reaction. (b)Calculate the weight of catalyst required to achieve a conversion of 80%. A+B2Ck1k2 2(c)Calculate the conversion with catalyst of total weight of 125 kg. What is the catalyst weight you would recommend to use for this process? Giving that: FA0 = 5 mol/s E = 25 kcal/mol k1= 0.4 dm6/mol.kg.s @310K Ke= 10,000 @ 325 K α = 0.012 /kg  |
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