Ethylene oxide (C2H40) is one of the major chemicals produced annually with the United States being the largest producer. It is an important chemical intermediate that is further converted to major consumer products such as pharmaceuticals, detergents and plastics. Ethylene oxide is formed from the partial oxidation of ethylene (C,H,) via silver (Ag) catalyst. Selective ethylene oxidation and unselective side reaction are indicated by the following competing/parallel reactions: k1 (0.502) C2H4 k2(302) C2H4 C2H40 2C02 + 2H20 A study on the kinetics of partial oxidation reaction of ethylene was done by one of the postgraduate students and the reaction was conducted in a fluidized bed reactor. A feed stream consisted of a mixture of ethylene in a range of 30% to 40% and the remaining is oxygen, entering the reactor at a temperature of 300K and a pressure at 20 atm. The reaction was performed at 470K – 500K. The formation of water in the side reaction is minimal and can be negligible. The kinetic parameters obtained from the experiment are summarized as in Table 2 below. Table 2 Kinetics information on ethylene oxide production Properties Parameters k1 (0.502) C2H4 k2(302) C2H4 C2H40 -Ta1 = kC 2C02 + 2H20 Let A as C2H4 Rate constants, k at 470K - 500K, with k;/k2 = 2/3 -Ta2 = kCA k, in a range of 0.3 – 0.5 am /mol:s a) purity, rather than the total amount of ethylene reacted. Yield is one of the parameters to characterize this performance. By optimizing the yield of reaction, the formation of product can be maximized. For this reaction, the fluidized bed reactor is operated under high gas velocity and thus, the mole balance can be modelled as CSTR. Determine the maximum ethylene oxide that can be formed. State your chosen ethylene composition and the rate constant value. The important performance factor is the production rate of ethylene oxide and its
Ethylene oxide (C2H40) is one of the major chemicals produced annually with the United States being the largest producer. It is an important chemical intermediate that is further converted to major consumer products such as pharmaceuticals, detergents and plastics. Ethylene oxide is formed from the partial oxidation of ethylene (C,H,) via silver (Ag) catalyst. Selective ethylene oxidation and unselective side reaction are indicated by the following competing/parallel reactions: k1 (0.502) C2H4 k2(302) C2H4 C2H40 2C02 + 2H20 A study on the kinetics of partial oxidation reaction of ethylene was done by one of the postgraduate students and the reaction was conducted in a fluidized bed reactor. A feed stream consisted of a mixture of ethylene in a range of 30% to 40% and the remaining is oxygen, entering the reactor at a temperature of 300K and a pressure at 20 atm. The reaction was performed at 470K – 500K. The formation of water in the side reaction is minimal and can be negligible. The kinetic parameters obtained from the experiment are summarized as in Table 2 below. Table 2 Kinetics information on ethylene oxide production Properties Parameters k1 (0.502) C2H4 k2(302) C2H4 C2H40 -Ta1 = kC 2C02 + 2H20 Let A as C2H4 Rate constants, k at 470K - 500K, with k;/k2 = 2/3 -Ta2 = kCA k, in a range of 0.3 – 0.5 am /mol:s a) purity, rather than the total amount of ethylene reacted. Yield is one of the parameters to characterize this performance. By optimizing the yield of reaction, the formation of product can be maximized. For this reaction, the fluidized bed reactor is operated under high gas velocity and thus, the mole balance can be modelled as CSTR. Determine the maximum ethylene oxide that can be formed. State your chosen ethylene composition and the rate constant value. The important performance factor is the production rate of ethylene oxide and its
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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Transcribed Image Text:Ethylene oxide (C2H40) is one of the major chemicals produced annually with the United
States being the largest producer. It is an important chemical intermediate that is further
converted to major consumer products such as pharmaceuticals, detergents and plastics.
Ethylene oxide is formed from the partial oxidation of ethylene (C,H4) via silver (Ag) catalyst.
Selective ethylene oxidation and unselective side reaction are indicated by the following
competing/parallel reactions:
k1 (0.502)
C2H4
k2(302)
C2H4
C„H40
2C02 + 2H20
A study on the kinetics of partial oxidation reaction of ethylene was done by one of the
postgraduate students and the reaction was conducted in a fluidized bed reactor. A feed
stream consisted of a mixture of ethylene in a range of 30% to 40% and the remaining is
oxygen, entering the reactor at a temperature of 300K and a pressure at 20 atm. The reaction
was performed at 470K – 500K. The formation of water in the side reaction is minimal and
can be negligible. The kinetic parameters obtained from the experiment are summarized as
in Table 2 below.
Table 2 Kinetics information on ethylene oxide production
Properties
Parameters
k1 (0.502)
C2H4
k2(302)
C2H40
-TA1 = kC;
C2H4
2C02 + 2H20
Let A as C2H4
-Taz = kCA
dm
Rate constants, k at 470K - 500K, with
k;/k2 = 2/3
Imol·s
k, in a range
of 0.3 – 0.5
a)
purity, rather than the total amount of ethylene reacted. Yield is one of the parameters to
characterize this performance. By optimizing the yield of reaction, the formation of product
can be maximized. For this reaction, the fluidized bed reactor is operated under high gas
velocity and thus, the mole balance can be modelled as CSTR. Determine the maximum
ethylene oxide that can be formed. State your chosen ethylene composition and the rate
constant value.
The important performance factor is the production rate of ethylene oxide and its
*Students are allowed to use any online software to solve the complex integration and roots
of equations.
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