7. Adsorption of an organic solute on activated silica gel gave the following data after equilibrium. S (mg cm-3) 0.139 0.089 0.066 0.047 0.037 Ca (mg/g) 0.03 0.026 0.0225 0.021 0.018 Fit the data to an adsorption isotherm and calculate the constants.

Design a sulfuric acid plant with a capacity of 8 ton per day. The product is to have a purity of 96% acid. Label all streams

what is the SOP for continuous fluidized bed dryer? and how to do the maintenance and cleaning?

An absorption column (1st unit) and a stripping tower (2nd unit) are used in a separation process
to separate gas mixtures that contains 35 mol% CO2 and the balance methane (CH4). The gas
mixture is fed to the bottom of absorption column where in the column, the gas mixture is
contacted with a recycled solvent. The contacting solvent stream contains 0.45 mol% dissolved
CO2 in methanol (CH3OH), which is recycled from the bottom of the stripping tower and enters
the absorption column at the top. The product gas stream leaving the top of absorption column
contains 1 mol% CO2 and 99 mol% methanol, where all methanol fed to the column exits in
this stream.
The liquid bottom stream of the absorption column which is rich in CO2 is fed to the top of the
stripping tower while a stream of nitrogen gas at a flow rate of 100 mol/h is fed to the bottom.
90% of carbon dioxide in the liquid solvent fed to the stripping tower is stripped off and exits
the tower together with the entire nitrogen fed. This stream is released to the atmosphere
through a stack. As mentioned above, the liquid stream leaving the stripping tower is the
recycled solvent stream of CO2 –methanol solution fed to the absorption column.
There are two assumptions made in this separation process where firstly, no methanol enters
as vapor phase in both columns as it is assumed to be non-volatile. Another assumption is that
nitrogen is insoluble in methanol. By taking 100 mol/h of gas mixture fed to the absorption
column as the basis of calculation,
a) With the support of a complete process flow chart, determine all flow rates and
compositions entering and leaving the stripping tower.

the explain application of the stability of the phases

(b) Explain the operating principles of a jaw crusher and a gyratory crusher. Under what circumstances would you consider replacing the jaw crusher in your process flowsheet with a gyratory crusher?

Hi there! I can not find solution of Octave Levenspiel Chapter 26. I need it immediately. Can you please help me!Thank you.

A solid feed consisting of

20 wt% of 1-mm particles and smaller

30 wt% of 2-mm particles

50 wt% of 4-mm particles

passes through a rotating tubular reactor somewhat like a cement kiln where it reacts with gas to give a hard nonfriable solid product (SCMI reaction control, T = 4 h for 4-mm particles).

26.3. Find the residence time needed for 100% conversion of solids.

26.4. Find the mean conversion of the solids for a residence time of 15 min.

26.5. Particles of uniform size are 60% converted on the average (shrinking core model with reaction controlling) when flowing through a single fluidized bed. If the reactor is made twice as large but contains the same amount of solids and with the same gas environment what would be the conversion of solids?

26.6. Solids of unchanging size, R = 0.3 mm, are reacted with gas in a steady flow bench scale fluidized reactor with the following result. F, = 10 gmlsec, W = 1000 gm, X, = 0.75 Also, the conversion is strongly temperature-sensitive suggesting that the reaction step is rate-controlling. Design a commercial sized fluidized bed reactor (find W) to treat 4 metric tonslhr of solid feed of size R = 0.3 mm to 98% conversion.

26.7. Solve Example 26.3 with the following modification: the kinetics of the reaction is ash diffusion controlled with T(R = 100 ~m=) 1 0 min.

26.8. Repeat Example 26.4 if twice the stoichiometric ratio of gas to solid, still at C,,, is fed to the reactor.

26.9. Repeat Example 26.4 if the gas is assumed to pass in plug flow through the reactor.

In a continuous distillation of a mixture of 40% A and 60% B with a flow rate of 10,000 kmol / hour, the volatile component composition is decomposed to 90% in distillate and 4% in boiler. Feeding is ¼ steam, ¾ liquid and partial condenser is used in the system.
a) Minimum ideal number of steps,
b) Minimum riflax rate,
c) Ideal stage number when the actual riflax ratio is 4.5 times the minimum value
d) Enrichment and peeling regions liquid and vapor flow rates (L, V, ?̅, ?̅),
e) If the average efficiency of the column is 0.5, the number of real steps,
f) Find the actual number of steps when n kad = 0.65

A triple effect forward-feed evaporator is used to concentrate 6 kg/s of 14% mass fraction of caustic soda at 75C to 47% mass fraction. Steam input in first effect is 150C. Vapour from the third effect is 39C at 7kPa. Overall heat transfer coefficient in effect 1, U1 is 3000 W/m2 K, effect 2, U2 is 2000 W/m2 K and effect 3, U3 is 1250 W/m2 K.

Find boiling point elevation in each effect.

When corn starch is added with water at 2:1 ratio and you apply strong force, the mixture will behave like solid. However, when you apply slow and steady force on the mixture, it will behave like liquid. Describe how this mixture can behave as a solid and liquid when different force is applied? Mention the type of non-Newtonian fluid for this mixture.

Q. In the worst-case scenario related to casing collapse pressure, explain from a practical point of view why the casing internal pressure is considered partially or completely empty. In other words, under what conditions the casing string can be empty or partially empty.

(Note: This question needs to be answered in the context of Petroleum Drilling Engineering advance level)

Please answer this question by typing. The answer should be one page A4.

1. Reynolds experiment is used to study flow behavior of fluids by slowly and steadily injecting dye into a pipe. The state of fluid flow will be determined and compared with the results from the calculation of the Reynolds number.
   1. Discuss observations made in the Reynolds number.
   2. Analyze various factors which effect the flow of fluids.

One of the classical models of epidemics is due to Kermack and McKendrick (1927). The model considers three classes of individuals: at time t, I(t) is the number of infected people in the population, S(t) is the number of non-infected susceptible people, and R(t) is the number of “removed” people (either cured or deceased). This model is often referred to as the “SIR” model (where each letter is pronounced, or pronounced as the word “sir”). The equations of the model are

S’(t) = −r*S*I

I’(t) = r*S*I − γ*I

R’(t) = γ*I

5. (8 pts) Eliminate t from the S and I equations to give a single ODE relating S and I by dividing one equation by the other (and justifying this process by the chain rule). Solve this ODE and sketch the solution curves. Compare these solution curves to your direction field picture