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| Titel: |
DETERMINATION OF REACTION INTERMEDIATES OF HETEROGENEOUS CATALYTIC REACTIONS BY FIELD PULSE DESORPTION DEDICATED TO PROF. JOHN HAPPEL ON THE OCCASION OF HIS 80th BIRTHDAY |
| Auteur: |
Block, J. H. Abend, G. Kruse, N. Weimer, J. J. |
| Verschenen in: |
Chemical engineering communications |
| Paginering: | Jaargang 83 (1989) nr. 1 pagina's 103-109 |
| Jaar: |
1989-09-01 |
| Inhoud: |
The reaction of CO and mixtures of CO/H2 with Co field emitter surfaces has been studied by pulsed field desorption mass spectrometry. Adsorption of CO at T=554K and p = 1.3 10-4 Pa occurs predominantly into a molecular state yielding CO+ and CoCO+ ions on field desorption. Subcar-bonyls are identified by the appearance as Co(CO) +x (,x = 2, 3). Part of the adsorbed CO dissociates, leading to carbide and oxide build up on the surface. The kinetics of the various surface processes have been investigated by reaction time variation measurements in the range 160 μs < tR < 32 ms. The steady surface layer formed during CO/H2 interaction at 405 K and p = 4 10-2;Pa has been analyzed, and various ions including Cx,Hy+ (x = 1-4, y = 1-3) have been detected. The corresponding neutral species are discussed for their role as intermediates in the methanation and Fischer-Tropsch reaction. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 17 gevonden artikelen
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