ICG Heterogeneous Catalysis Performance P10-3 t-Butyl alcohol (TBA) is an important octane enhancer that is used to replace lead additives in gasoline [Ind. Eng. Chem. Res., 27, 2224 (1988)]. TBA was produced by the liquid-phase hydration (W) of isobutene (I) over an Amberlyst-15 catalyst. The system is normally a multiphase mixture of hydrocar- bon, water, and solid catalysts. However, the use of cosolvents or excess TBA can achieve reasonable miscibility. The reaction mechanism is believed to be Derive a rate law assuming: I S (P10-3.1) I+S W.S (P10-3.2) WSZ W S+I SE TBA S+S (P10-3.3) TBA SZ TBA + S (P10-3.4) (a) The surface reaction is rate-limiting. (b) The adsorption of isobutene is limiting. (c) The reaction follows Eley-Rideal kinetics I SW TBA S (P10-3.5) and the surface reaction is limiting. (d) Isobutene (1) and water (W) are adsorbed on different sites. T + S₁ W + S₂ W. S₂ TBA is not on the surface, and the surface reaction is rate-limiting. Ans.: TBA=-= [CCW-CTBA/K] (1+KwCw) (1+KC) (P10-3.6) (P10-3.7) (e) What generalization can you make by comparing the rate laws derived in parts (a) through (d)?
ICG Heterogeneous Catalysis Performance P10-3 t-Butyl alcohol (TBA) is an important octane enhancer that is used to replace lead additives in gasoline [Ind. Eng. Chem. Res., 27, 2224 (1988)]. TBA was produced by the liquid-phase hydration (W) of isobutene (I) over an Amberlyst-15 catalyst. The system is normally a multiphase mixture of hydrocar- bon, water, and solid catalysts. However, the use of cosolvents or excess TBA can achieve reasonable miscibility. The reaction mechanism is believed to be Derive a rate law assuming: I S (P10-3.1) I+S W.S (P10-3.2) WSZ W S+I SE TBA S+S (P10-3.3) TBA SZ TBA + S (P10-3.4) (a) The surface reaction is rate-limiting. (b) The adsorption of isobutene is limiting. (c) The reaction follows Eley-Rideal kinetics I SW TBA S (P10-3.5) and the surface reaction is limiting. (d) Isobutene (1) and water (W) are adsorbed on different sites. T + S₁ W + S₂ W. S₂ TBA is not on the surface, and the surface reaction is rate-limiting. Ans.: TBA=-= [CCW-CTBA/K] (1+KwCw) (1+KC) (P10-3.6) (P10-3.7) (e) What generalization can you make by comparing the rate laws derived in parts (a) through (d)?
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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![ICG Heterogeneous Catalysis Performance
P10-3 t-Butyl alcohol (TBA) is an important octane enhancer that is used to replace lead additives in gasoline
[Ind. Eng. Chem. Res., 27, 2224 (1988)]. TBA was produced by the liquid-phase hydration (W) of
isobutene (I) over an Amberlyst-15 catalyst. The system is normally a multiphase mixture of hydrocar-
bon, water, and solid catalysts. However, the use of cosolvents or excess TBA can achieve reasonable
miscibility.
The reaction mechanism is believed to be
Derive a rate law assuming:
I S
(P10-3.1)
I+S
W.S
(P10-3.2)
WSZ
W S+I SE
TBA S+S
(P10-3.3)
TBA SZ
TBA + S
(P10-3.4)
(a) The surface reaction is rate-limiting.
(b) The adsorption of isobutene is limiting.
(c) The reaction follows Eley-Rideal kinetics
I SW TBA S
(P10-3.5)
and the surface reaction is limiting.
(d) Isobutene (1) and water (W) are adsorbed on different sites.
T + S₁
W + S₂
W. S₂
TBA is not on the surface, and the surface reaction is rate-limiting.
Ans.: TBA=-=
[CCW-CTBA/K]
(1+KwCw) (1+KC)
(P10-3.6)
(P10-3.7)
(e) What generalization can you make by comparing the rate laws derived in parts (a) through (d)?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fab0ba513-ff83-44e4-8162-ac01cf3c31a0%2F4fbef36a-742f-490d-b3c6-71e9d239bbc3%2Fr7rwc6k_processed.jpeg&w=3840&q=75)
Transcribed Image Text:ICG Heterogeneous Catalysis Performance
P10-3 t-Butyl alcohol (TBA) is an important octane enhancer that is used to replace lead additives in gasoline
[Ind. Eng. Chem. Res., 27, 2224 (1988)]. TBA was produced by the liquid-phase hydration (W) of
isobutene (I) over an Amberlyst-15 catalyst. The system is normally a multiphase mixture of hydrocar-
bon, water, and solid catalysts. However, the use of cosolvents or excess TBA can achieve reasonable
miscibility.
The reaction mechanism is believed to be
Derive a rate law assuming:
I S
(P10-3.1)
I+S
W.S
(P10-3.2)
WSZ
W S+I SE
TBA S+S
(P10-3.3)
TBA SZ
TBA + S
(P10-3.4)
(a) The surface reaction is rate-limiting.
(b) The adsorption of isobutene is limiting.
(c) The reaction follows Eley-Rideal kinetics
I SW TBA S
(P10-3.5)
and the surface reaction is limiting.
(d) Isobutene (1) and water (W) are adsorbed on different sites.
T + S₁
W + S₂
W. S₂
TBA is not on the surface, and the surface reaction is rate-limiting.
Ans.: TBA=-=
[CCW-CTBA/K]
(1+KwCw) (1+KC)
(P10-3.6)
(P10-3.7)
(e) What generalization can you make by comparing the rate laws derived in parts (a) through (d)?
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