Infrared study of syngas adsorption on zirconia

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Langmuir; (USA)

DOI:https://doi.org/10.1021/la00099a005· OSTI ID:6307194

Guglielminotti, E ^[1]

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1. Chimica Fisica e Chimica dei Materiali Universita, Torino (Italy)

The adsorption of CO, H{sub 2}, and their mixtures on zirconia has been followed by FTIR technique. On samples reduced at 823 K, no hydrogen adsorbed species has been found at room temperature. Two CO species are reversibly adsorbed at room temperature giving bands at {approx} 2,110 cm{sup {minus}1} assigned to CO chemisorbed on Zr{sup 4+} and Zr{sup 3+} sites, respectively. Between 423 and 673 K, the adsorption of syngas under static conditions produces formate and methoxide surface species in equilibrium. These species are intermediates in the formation of methyl alcohol and dimethyl ether produced under dynamic flow conditions on ZrO{sub 2}. Only the formate species remains on the surface at T {ge} 673 K, and this species is reduced to CO by hydrogen at T {approx} 523 K.

• OSTI ID: 6307194
• Journal Information: Langmuir; (USA), Journal Name: Langmuir; (USA) Vol. 6:9; ISSN 0743-7463; ISSN LANGD
• Country of Publication: United States
• Language: English

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ADSORPTION
ALCOHOLS
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