Aside from designing a new reactor, you are also planning to repurpose an unused CSTR(VCSTR = 4.3 m³) that has been placed in the maintenance warehouse for far too long. The repurposing of this CSTR would save a huge cost for your company if it is proven that the CSTR is suitable for the non-catalytic, adiabatic alkylation of ethylene process. Assess the suitability of this unused CSTR for the process by conducting detailed design calculation and analysis and compare its feasibility for the thermal alkylation of ethylene process with the reactor selected in Task 1. Note:1) Assume that side reaction is negligible. 2) For Task 2, assume that the reaction of order is 2nd order of reaction with respect to toluene and zero order of reaction with respect to ethylene. 3) Use the same rate constant as the one used in Task 1. 4) Given that the root equation of X; X 2(TkCAO +1)(To/T)²-√√4TkCAO (To/T)² +1 2(TKCA0) (To/T)²

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Reaction engineering

Question Statement
Ethylbenzene is a widely used industrial chemical. It is often found in other
manufactured products such as pesticides, inks, synthetic rubbers, paints, and tobacco
products. Global consumption of ethylbenzene is estimated to grow up to 5% per year
for the next 5 years, with the escalation of growth mainly contributed by the recovery
process from the steep decline due to the impact of Covid-19 global pandemic circa
2020. It is expected that the global ethylbenzene market will reach 40.2 million tons by
2027. Due to the market potential of ethylbenzene, a chemical company, ChemMaju
Sdn. Bhd. is planning to expand its production by producing ethylbenzene as one of its
major products.
At industrial scale, ethylbenzene is produced via various production routes. The
most widely known route is the alkylation of ethylene (AEO). Since alkylation of
ethylene is an established process, as a beginner in ethylbenzene production in
Malaysia, ChemMaju Sdn. Bhd. is planning to produce ethylbenzene via this route. The
production capacity is expected to be around 40, 000 MTPA of ethylbenzene. Although
AEO is an established process, it has a drawback in which the production of
ethylbenzene is accompanied by the production of styrene as an undesired product:
C6H5CH3 + 2 C2H4 → C6H5C2H5 + C3H6
(Equation 1 - Main reaction)
C6H5C2H5
C3H8 + H2
(Equation 2 - Side reaction)
As the lead process engineer in ChemMaju Sdn. Bhd., you are given the task to design
of an ethylbenzene production plant. Your first step is to lead your team in designing
the reactor for the alkylation of ethylene process. In order
to use a non-catalytic, adiabatic flow reactor. Since the reaction is non-catalytic, the
process should be a thermal process to ensure its thermodynamic feasibility, with
minimum required inlet reaction temperature of 227 °C. The homogeneous reaction is
in gas phase, with constant total pressure of 7.5 atm. The reaction of the reactants is
1:2 (toluene: ethylene) based on stoichiometric ratio. However, the feed is 1:4 (toluene:
ethylene), making it insufficient toluene to consume all the ethylene. Therefore, toluene
is the limiting reactant for the basis of calculation.
save cost, you proposed
Transcribed Image Text:Question Statement Ethylbenzene is a widely used industrial chemical. It is often found in other manufactured products such as pesticides, inks, synthetic rubbers, paints, and tobacco products. Global consumption of ethylbenzene is estimated to grow up to 5% per year for the next 5 years, with the escalation of growth mainly contributed by the recovery process from the steep decline due to the impact of Covid-19 global pandemic circa 2020. It is expected that the global ethylbenzene market will reach 40.2 million tons by 2027. Due to the market potential of ethylbenzene, a chemical company, ChemMaju Sdn. Bhd. is planning to expand its production by producing ethylbenzene as one of its major products. At industrial scale, ethylbenzene is produced via various production routes. The most widely known route is the alkylation of ethylene (AEO). Since alkylation of ethylene is an established process, as a beginner in ethylbenzene production in Malaysia, ChemMaju Sdn. Bhd. is planning to produce ethylbenzene via this route. The production capacity is expected to be around 40, 000 MTPA of ethylbenzene. Although AEO is an established process, it has a drawback in which the production of ethylbenzene is accompanied by the production of styrene as an undesired product: C6H5CH3 + 2 C2H4 → C6H5C2H5 + C3H6 (Equation 1 - Main reaction) C6H5C2H5 C3H8 + H2 (Equation 2 - Side reaction) As the lead process engineer in ChemMaju Sdn. Bhd., you are given the task to design of an ethylbenzene production plant. Your first step is to lead your team in designing the reactor for the alkylation of ethylene process. In order to use a non-catalytic, adiabatic flow reactor. Since the reaction is non-catalytic, the process should be a thermal process to ensure its thermodynamic feasibility, with minimum required inlet reaction temperature of 227 °C. The homogeneous reaction is in gas phase, with constant total pressure of 7.5 atm. The reaction of the reactants is 1:2 (toluene: ethylene) based on stoichiometric ratio. However, the feed is 1:4 (toluene: ethylene), making it insufficient toluene to consume all the ethylene. Therefore, toluene is the limiting reactant for the basis of calculation. save cost, you proposed
Task 2
Aside from designing a new reactor, you are also planning to repurpose an unused
CSTR(VCSTR = 4.3 m) that has been placed in the maintenance warehouse for far too
long. The repurposing of this CSTR would save a huge cost for your company if it is
proven that the CcSTR is suitable for the non-catalytic, adiabatic alkylation of ethylene
process. Assess the suitability of this unused CSTR for the process by conducting
detailed design calculation and analysis and compare its feasibility for the thermal
alkylation of ethylene process with the reactor selected in Task 1.
Note:1) Assume that side reaction is negligible.
2) For Task 2, assume that the reaction of order is 2nd order of reaction with
respect to toluene and zero order of reaction with respect to ethylene.
3) Use the same rate constant as the one used in Task 1.
4) Given that the root equation of X;
2(tkCA0 + 1)(To/T)² – /4tkCA0(To/T)² + 1
2(tkCA0) (To/T)2
Transcribed Image Text:Task 2 Aside from designing a new reactor, you are also planning to repurpose an unused CSTR(VCSTR = 4.3 m) that has been placed in the maintenance warehouse for far too long. The repurposing of this CSTR would save a huge cost for your company if it is proven that the CcSTR is suitable for the non-catalytic, adiabatic alkylation of ethylene process. Assess the suitability of this unused CSTR for the process by conducting detailed design calculation and analysis and compare its feasibility for the thermal alkylation of ethylene process with the reactor selected in Task 1. Note:1) Assume that side reaction is negligible. 2) For Task 2, assume that the reaction of order is 2nd order of reaction with respect to toluene and zero order of reaction with respect to ethylene. 3) Use the same rate constant as the one used in Task 1. 4) Given that the root equation of X; 2(tkCA0 + 1)(To/T)² – /4tkCA0(To/T)² + 1 2(tkCA0) (To/T)2
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