subject
Engineering, 25.11.2021 14:10 ashleywoo21361

Dimethyl ether (DME) is produced by the catalytic dehydration of methanol using an acid zeolite catalyst:
2CH3OH gives (CH3)2O + H2O
The fresh feed supplied to the process contains 99.15 mol% methanol and
0.85 mol% water. The feed is mixed with a recycle stream before being fed to the
reactor. This mixed reactor feed contains 98.40 mol% CH3OH, 1.14 mol% H2O and
0.46 mol% (CH3)2O. The methanol conversion per pass is 79.91%. The reactor outlet
stream is subsequently fed to a series of two separators.
The first separator recovers the dry DME product at a purity of 99.50%, with the bottoms, which is 66.92 mol% water, being fed to the second separation unit.
In the second separator waste water,
contaminated with 0.53% methanol, is recovered and the remaining unreacted methanol is recycled along with all of the DME present in the bottoms from the first separator, giving a recycle stream which contains 2.11 mol% DME.
(a) Draw a block diagram of the DME process and select a suitable basis for
your calculation.
(b) Determine the composition and flow rates of all streams in the process,
presenting your answer as a stream table.
(c) Determine the recycle ratio and the overall methanol conversion.
(d) If the annual production target is 50,000 tonnes of DME (99.5% purity)
calculate the hourly DME production and fresh feed rates in kmol/h,
assuming an operating factor of 0.956 (fractional plant availability).

ansver
Answers: 3

Another question on Engineering

question
Engineering, 04.07.2019 12:10
On a average work day more than work place firs are reorted
Answers: 1
question
Engineering, 04.07.2019 18:20
For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.
Answers: 1
question
Engineering, 04.07.2019 18:20
An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.
Answers: 3
question
Engineering, 04.07.2019 19:10
An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed
Answers: 3
You know the right answer?
Dimethyl ether (DME) is produced by the catalytic dehydration of methanol using an acid zeolite ca...
Questions
question
Mathematics, 15.06.2021 19:10
question
Chemistry, 15.06.2021 19:10
question
Mathematics, 15.06.2021 19:10
question
Mathematics, 15.06.2021 19:10
question
Mathematics, 15.06.2021 19:10
question
Mathematics, 15.06.2021 19:10
question
English, 15.06.2021 19:10