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Lookup NU author(s): Dr Katarina Novakovic, Dr Arijit Mukherjee, Dr Mark Willis, Professor Allen Wright
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This paper reports the influence of reaction temperature on the occurrence and characteristics of pH oscillations that are observed during the palladium-catalysed phenylacetylene oxidative carbonylation reaction in a catalytic system (PdI2, KI, air, NaOAc) in methanol. Isothermal experiments were performed over the temperature range 10-50 °C. The experiments demonstrate that oscillations occur in the range 10-40°C and that a decrease in reaction temperature results in an increase in the period and amplitude of the pH oscillations. Furthermore, it is observed that during oscillations at any specific temperature, the time taken for pH to increase from a minimum to a maximum value varies with respect to reaction time. However, the time required for the pH to fall from maximum to new minimum is approximately constant with respect to the reaction time and is a function of the reaction temperature. © the Owner Societies 2009.
Author(s): Novakovic K, Mukherjee A, Willis M, Wright A, Scott S
Publication type: Article
Publication status: Published
Journal: Physical Chemistry Chemical Physics
Year: 2009
Volume: 11
Issue: 40
Pages: 9044-9049
ISSN (print): 1463-9076
ISSN (electronic): 1463-9084
Publisher: Royal Society of Chemistry
URL: http://dx.doi.org/10.1039/b905444h
DOI: 10.1039/b905444h
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