t-Butyl alcohol (TBA) is an important octane enhancer that is used to replace lead additives in gasoline. 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 hydrocarbon, water, and solid catalysts. The use of cosolvents or excess TBA can improve miscibility. The reaction mechanism is believed to be: K, = k,/k- W +S = W S Kw = kw/k-w W.S+1.S= TBA S+S Ke = kror/krev %3D TBA S= TBA + S KTBA = 1/KTBAD =k-TBA/KTBA Derive a rate law assuming: a) the surface reaction is rate-limiting. b) the adsorption of isobutene is limiting.

t-Butyl alcohol (TBA) is an important octane enhancer that is used to replace lead additives in gasoline. 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 hydrocarbon, water, and solid catalysts. The use of cosolvents or excess TBA can improve miscibility. The reaction mechanism is believed to be: K, = k,/k- W +S = W S Kw = kw/k-w W.S+1.S= TBA S+S Ke = kror/krev %3D TBA S= TBA + S KTBA = 1/KTBAD =k-TBA/KTBA Derive a rate law assuming: a) the surface reaction is rate-limiting. b) the adsorption of isobutene is limiting.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

t-Butyl alcohol (TBA) is an important octane enhancer that is used to replace lead
additives in gasoline. 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 hydrocarbon, water, and solid catalysts. The use of cosolvents or excess
TBA can improve miscibility. The reaction mechanism is believed to be:
K, = k;/k-
W +S = W •S
Kw = kw/k-w
W.S+1.S= TBA ·S+S
Ke = kfor/krev
%3D
TBA · S= TBA + S
KTBA = 1/KTBAD = k-TBA/KTBA
Derive a rate law assuming:
a) the surface reaction is rate-limiting.
b) the adsorption of isobutene is limiting.

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