The decomposition of ethanol (C2H5OH) on an alumina (Al203) surface was studied at 600 K. Concentration versus time data were collected for this reaction, and a plot of [A] versus time resulted in a straight line with a slope of -4x10-5 M/s. i. If the initial concentration of C2H5OH was 0.0125 M, calculate the half-life for this reaction. ii. How much time is required for all the C2H5OH decompose? O a. (i) t = 104 s (ii) t = 303 s O b. (i) t = 104 s (ii) t = 313 s O c. (i) t = 156 s (ii) t = 303 s O d. (i) t = 156 s (ii) t = 313 s

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B- The isomerization of butane C,H10-C,H0 was carried out in the liquid phase. The data for this reversible reaction are given in Table below. 0.0 0.2 0.4 0.6 0.65 A (kmol/m'.h) This reaction has been done in three different reactors as shown below: 39 53 59 38 25 X;= 0.1 X 0.5 X- 0.6 Calculate the volume of cach of the reactors for an entering molar flow rate of n-butane of 52 kmol/hr.

Discuss the procedure that you should follow to design a continuous countercurrent multistage solid-liquid extraction unit.

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The half-life of a biologically degraded contaminant is 1 h. Therefore, the kinetic constant of the reaction is most nearly (A) 17/d (В) 24/d (С) 73/d (D) 96/d

In Figure P11.6 you will see two successive liquid separations columns operating in tandem in the steady state (and with no reaction taking place). The compositions of the feed and products are as shown in the figure. The amount of W₂ is 20% of the feed. Focus only on the material balances. Write down the names of the material bal- ances for each column treated as separate units (one set for each column), along with the balances themselves placed next to the names of the balances. Also, place an as- terisk in front of the names of the balances that will comprise a set of independent equations for each column. Write down in symbols the unknowns for each column. Calculate the degrees of freedom for each column separately. AD W₁ % Feed 100 kg A 15 % A 60 B 20 B 30 C 55 C 20 ▲ P₁ P₂ W₂ % A 10 B 85 C5 % A 0.2 в 7 C ?

REACTION ENGINEERING  Consider a heterogeneous gas-phase catalytic reaction:AB(g)→A(g)+B(g) (Catalyst) The surface reaction mechanism follows three steps: AB(g) +S <----> AB*S (Adsorption)AB*S<----> B*S+A(g) (Surface reaction)B*S <---> B(g) + S (Desorption) a) Derive the initial rates (AR) of the reaction, assuming there is no product (ie., A and B) in the feed (ie., PA Pao=0), assuming adsorption is the rate determining step. Use initial pressure of AB (ie., PARA), total number of sites on the surface (C), and the rate and equilibrium constants in the expressions.Hint: Based on the reaction mechanism, only AB and B are adsorbed on the surface, i.e., there is no evidence that A alone can be adsorbed on the surface.

can you please help with anything?  1) Calculate the mole flow rates of all components in stream. 2) Calculate the single pass conversion 3) overall conversion

J 5 Figure 5.1 shows the experimental observation for ethane (A) cracking to produce gas products ethylene (E) and hydrogen (H). Based on Figure 5.1, propose both reaction mechanism and rate-limiting step for this reaction.