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Ethylbenzene (EB) Production Plant

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osamh alharbi

on 5 January 2016

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Transcript of Ethylbenzene (EB) Production Plant

In conclusion, ethylbenzene (EB) production became a significant industry, and cost-effective, environmentally friendly with more expanded capacities requirements are rising.

In the plant design that we've done, we met all expectations for the required plant capacity, a very profitable, and fast break-even point are reached.
And, the design was supported with modern simulation software analysis.
Conclusion & Recommendations:
The ethyl benzene (C8H10) is an organic compound, highly flammable, colorless liquid

Most of the ethylbenzene in the world are manufactured by alkylating (99%) of benzene with ethylene, alkylation means transferring an alkyl (ethylene) group from one molecule to another,

These are some of the most known alkylation processes
Process Alternatives:
The desired product to be produced is 100000 tons/yr with 99.9% purity
Material Balance (MB):
the result from aspen simulation

Simulation with Aspen Plus:
Energy Balance (EB):
Ethylbenzene (EB) Production Plant :
P&ID Diagram :
Osama Al-Harbi 212537094
Alaa Al-Alawi 212520758
Ahmad Al-Ghamdi 212505845
Abdullah Al-Zuwidi

Course Instructor: Dr. Mohammad Al-Yaari.

Industrial Uses:
Adhesives and sealant chemicals
Fuels and fuel additives
Laboratory chemicals
Consumer Uses :
Arts, Crafts, and Hobby Materials
Building/Construction Materials not covered elsewhere
Electrical and Electronic Products
Food Packaging
Fuels and Related Products

Process Selection:

1st process was selected due to various factors such as:

Rich in literature, aid the designing stage.
More cost-efficient in the sense of raw materials usage.
No by-product, both reactors by-product and unreacted raw materials were recycled to the feed stream.
we assumed that the plant will run 320 day the rest of the year we left it as a precaution for shutdown .
From these caluation we can get the scale up factor :
Scale up= (122.6/630.6)=0.194481

CSTR 1 :

Scale up
Scale up
Column 1:
Scale up
Column 2 :
Scale up

Qp=-5.687 (MJ )/hr
first distillation column:
Base temperature = 314 K
Reflex ratio = L/D=0.774
L = 0.774 * D = 0.774 * 188.5303 = 145.922 Kmol/hr
V = L + D = 145.922 + 188.5303 = 334.4527 Kmol/hr
Since we have 99.89% Benzene in Distillate, we may assume boiling point of stream equal to boiling point of Benzene at 0.3 atm
Using Antoni equation to calculate the boiling point for Benzene
Ln Psat = A - B/(T+C)
TBP = (B-C(A-Psat))/(A-Psat)
TBP = 318.65 K, latent heat of vapor (γ_B) = 30781 KJ/Kmo

Input = Output
HV = HD + HL + QC
QC = HV + (HD + HL)
HD + HL = 0
HV = Sensible heat of gas + Latent heat + Sensible heat of liquid
HV = QC = 14663841 KJ/hr
Water flow (ṁW) = (QC )/(CP * ∆T)= 14663841/(4.2 * (432-318 ) )=30626 Kg/hr
The overall system energy balance:
QB = QC +HB + HD - HF= 8275800 KJ/hr
Psat (E) = 283.90933 atm
Psat (B) = 6.83693 atm
Psat (EB) = 1.8047127 atm
Psat (DEB) = 0.5193508 atm
P = ∑Xi P^SAT =〗4.34 atm < 19 atm (liquid)
From Aspen plus, we figure out the liquid heat capacity at 432 K and 19 atm
CP Mix = 225.582 KJ/(Kg.K)
HF = ṁW * CP Mix * ∆T=9742796 KJ/hr
HB = ṁW * CP Mix * ∆T=3354755 KJ/hr
second distillation column:
Steam required = QB/(γ(steam))= 8275800/(2174 )=3806 kg/hr
Base temperature = 338 k
Reflex ratio = L/D=0.661
L = 0.661 * D = 0.661 * 122.6011 = 81.039 Kmol/hr
V = L + D = 81.039 + 122.6011 = 203.6404 Kmol/hr

Water flow (ṁW) = (QC )/(CP * ∆T)= (8916926 )/(4.2*(390-338 ) )=40828 Kg/hr
QB = QC + HB + HD - HF
QB = 8916926 + 1145735 + 0 – 2295356= 7767305 KJ/hr
Steam required = QB/(γ(steam))= 7767305/(2174 )=3572 kg/hr
Cost Analysis:
we assumed that the interest rate i = 10%, the average annual cash flow is 9.62 Million, and the return year in 2.865
Full transcript