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Question 44455

posted 10 months ago

ii. Rxn 2, using partial pressures...
ili. Rxn 3, catalytie reaction using concentrations
i Rxn 1, using concentrations
\text { Rxn 1: } \mathrm{C}_{2} \mathrm{H}_{2}+2 \mathrm{Cl}_{2} \rightarrow \mathrm{C}_{2} \mathrm{H}_{2} \mathrm{Cl}_{4}
c. Write the rate law for each reaction and indicate the proper units (using s (for time),mol/l (for conc.), atm (for partial pressure), and g for cat. wt.) for each rate constant,as well as for the equilibrium constant for reversible reactions.
b. Show the Stoichiometric Table for each reaction.
i Rxn 1, feed is 50% C2H/50% Cl2
For each case, if the feed is stoichiometric, say so, if not, identify the Limiting Reactant
Use these three elementary reactions:
iii. Rxn 3: feed is 35% CH/60% F/5% H2
\mathrm{Rxn} 3: 2 \mathrm{~F}_{2}+\mathrm{CH}_{4} \rightarrow 2 \mathrm{H}_{2}+\mathrm{CF}_{4}
\operatorname{Rxn} 2: 3 \mathrm{H}_{2}+\mathrm{N}_{2} \rightleftharpoons 2 \mathrm{NH}_{3}
ii. Rxn 2, feed is 25% N/75% H2
d. Now assume the value of the rate constant in terms of the Limiting Reactant is 1.4 (withthe appropriate units) and calculate the rate constant for each of the other species(including the products) in each reaction.

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Question 44457

posted 10 months ago

3. The reversible, elementary liquid-phase reaction D+E F is run in a flow reactor. At the temperature in the reactor, the forward rate constant is 0.001 /(mol*min), and the equilibrium constant is 8.385 t/mol. The feed is 70% D/26% E/4% F flowing at 42 t/s with a total molar flowrate of 108 mol/s.
a. Determine the limiting reactant (LR) and show the stoichiometric table.
b. Calculate the equilibrium conversion.
What conversion will be obtained in a V= 758 e PFR?
e. If the reaction is run instead in a series of two CSTR's, each with a volume of XV,what will the conversion be at the outlet of each CSTR?

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Question 44456

posted 10 months ago

This Levenspiel plot is for the reaction Rproducts. The feed is pure R.
a. Find the CSTR volume to get 60% conversion.
b. Repeat for a single PFR.400
c. Repeat parts (a) and (b)but for 80% conversion.
250d. For what conversion(between 60% and 80%)will the single CSTR volume be the same as20015010050that for the single PFR?What's the volume?

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Question 45638

posted 10 months ago

Consider the following storage tank shown in Fig. E.5. The volumetric flow rateare varied with time. The valve used on the outlet flow is linear with resistanceR1 = 0.3. The cross-sectional area of the tank is 3 m?. The height of the liquid inthe tank at steady-state condition h = 4 m. Answer the following:
\text { a) Obtain a transfer function relating liquid level with inlet flow rate } \frac{H^{\prime}(S)}{Q_{1}^{\prime}(S)}
b) For a step-change in the inlet flow from 3m³/s to 4m³/s, find the final value of the height of the liquid in the tank.

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Question 45637

posted 10 months ago

Solve the following ODE using Laplace method:
\frac{d^{2} x}{d t^{2}}+6 \frac{d x}{d t}+4 x=3 e^{-t}, \frac{d x}{d t}(0)=x(0)=0

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Question 45640

posted 10 months ago

The outlet concentration of CSTR reactor is related to the inlet temperature of thereactor by:
\frac{C_{A}(S)}{T_{i}(S)}=\frac{K}{\tau^{2} S^{2}+2 \tau \zeta S+1}
When the inlet temperature is suddenly changed from 40 °C to 41 °C. The outletconcertation response is shown in in Fig. E.7. Determine the following:
a) The Steady-state gain?
b) value of overshoot and decay ratio?
c) The Damping coefficient?
d) The value of the time constant?

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Question 45634

posted 10 months ago

Two tanks are connected together in the following unusual way in Fig. E2.3. Develop a model for this system that can be used to find hj, h2,W2, and w3 as functions of time for any given variations in inputs.
1. The density of the incoming liquid,p, is constant.
2. The cross-sectional areas of the two tanks are A1 and A2.
3. w2 is positive for flow from Tank 1 to Tank 2.
4. The two valves are linear with resistances R2 and R3.

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Question 45642

posted 10 months ago

The Exothermic reaction A → 2B is taking place in the CSTR reactor shown inFig. E.9. Component A is considered as expensive material. Since the reaction isexothermic the temperature of the tank need to be controlled at 60 °C to avoidtemperature run-away. Also, the outlet concentration of CA is required to be atset-point CP. The level of the CSTR product mixture is controlled to avoid theoverflow.
1. What is the type of valves V-1, V-2, V-4?
2. What is the type of controllers used for the control loops in the process?
3. What is the action of the controller selected (reverse, direct)?
4. Draw a P&ID diagram of the schematic given for each control loops.

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Question 45636

posted 10 months ago

A completely enclosed stirred-tank heating process is used to heat an incomingstream whose flow rate varies. The heating rate from this coil and the volume areboth constant. Develop a mathematical model for the process if the heat losses tothe atmosphere occur.
1. p and Cpare constants.
2. U, the overall heat transfer coefficient, is constant.
3. A, is the surface area for heat losses to ambient.
4. T; > Ta (inlet temperature is higher than ambient temperature).

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Question 45643

posted 10 months ago

\text { Consider a feedback control system with P-controller, } G_{v}=\frac{0.5}{25+1}, G_{P}=
\frac{2}{35+1}, G_{m}=0.2 . \text { Find the range of the controller gain } K_{c} \text { to ensure the stability }
following Routh stability method.

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