Mathematische Modellierung chemischer Reaktoren — Entwicklung und Einbindung neuer Technologien

Matros, Yuri Shaevich

doi:10.1002/ange.19901021110

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Cited by 10 publications

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“…Non-stationary reaction conditions may im-prove the yield and selectivity of reactions or reduce energy consumption as compared to stationary conditions [4][5][6]. Non-stationary reaction conditions may im-prove the yield and selectivity of reactions or reduce energy consumption as compared to stationary conditions [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Periodic Forcing of NO Reduction on a Pt(100) Surface

Schütz¹,

Imbihl²

2002

Zeitschrift Für Physikalische Chemie

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The influence of a cycled gas feed on reactions of the automotive catalytic converter has been investigated under low pressure conditions ( p < 10 −3 mbar) with a Pt(100) surface as catalyst. Catalytic NO reduction with CO or H 2 as reducing agent was studied in binary mixtures. The reactions were forced around the unstable high rate branch of the rate vs. T hysteresis by applying a square-wave modulation of p CO ( p H2 ). For the NO + CO reaction the yield vs frequency dependence exhibits a pronounced maximum. The pressure modulation causes a periodic structural transformation 1 × 1 ↔ hex. The frequency dependence of the yield is largely related to the average concentration of defects which are created during the phase transition.

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