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Reaction-Induced Cluster Ripening and Initial Size-Dependent Reaction Rates for CO Oxidation on Pt-n/TiO2(110)-(1x1)

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Atmospheric heterogeneous reactions of chlorine and bromine containing molecules

Arnaud Aguzzi

This thesis deals with a laboratory study of heterogeneous reactions involving bromine and chlorine containing reservoir species on alkali salt substrates which are relevant to the marine boundary layer, and on ice substrates which are relevant to the lowe ...

EPFL2001

Performance enhancement of a microchannel reactor under periodic operation

Albert Renken, André Rouge

The transient behavior of the dehydration of isopropanol has been studied in a microreactor. The av. productivity under periodic operation is found to be considerably higher compared to steady state even for conversions reaching 80%. The optimal cycle peri ...

Elsevier2001

A laboratory study of heterogeneous reactions relevant to the atmospheric boundary layer

Dominik Stadler

The present work deals with two subjects. The interaction of NO2 and HONO with different types of soot are examined in the first part whereas in the second part an experimental set-up is presented which has been built in order to measure the kinetics of th ...

EPFL2000

Modeling the dynamics ofthe N2O reduction on Iron Oxide

Albert Renken, Harvey Randall

The reduction of N2O to N2 on iron oxide under transient conditions was studied in the temperature range of 270–340°C. Six different models were used to simulate the experimental data. The conventional second-order reaction between gas phase N2O and surfac ...

1997

Etude cinétique de systèmes de faible énergie par une technique de saut de température

Chemical systems with standard reaction enthalpies (ΔH0r) and an activation energies (Ea) of a few tens of kcal/mol are generally well described by the unimolecular reaction rate theory. The goal of this work is to determine the limits of this model by stu ...

EPFL1992

Reaction mechanism of methanol dehydrodenation on sodium carbonate catalyst

Albert Renken

The aim of this study is to identify the reaction mechanism of methanol dehydrogenation on sodium carbonate catalyst. Quantitative analyses of the products of methanol dehydrogenation on sodium carbonate catalyst at 963 K indicate that methane is formed in ...

1992

Forced concentration oscillations for catalytic reactions with stop-effect

Albert Renken

The effect of forced concn. oscillations on a catalytic reaction with stop-effect was studied based on 2 different adsorption-desorption models. Both models predict mean reaction rates which can be more than twice as high as the max. rate under optimum ste ...

1991

Transient behavior of catalytic reactions with stop-effect

Albert Renken

The transient behavior of a heterogeneous catalytic process described by a 2-site adsorption-desorption model was studied. After a stop on the supply of reactant, a temporary increase in the prodn. rate is predicted. Anal. solns. to describe the instantane ...

1990

Direct microgravimetric measurement of sorption kinetics under conditions of reaction

Albert Renken

A gravimetric app. contg. catalyst particles (H2SO4 on silicate) is used to det. the ethylene [74-85-1] absorption rate during the prepn. of vinyl acetate [108-05-4] from ethylene and AcOH. The influence of the absorption process on the overall reaction at ...

1983

Studies on the instability of isothermal heterogeneous fixed bed reactors

Albert Renken

Oscillation of the reaction rate, leading to strong, irregular oscillation of the conversion in dependence on the time, and sudden conversion changes occurred in certain temp. and concn. regions in the exptl. study of the catalytic hydrogenation of C2H4 wi ...

1975