Generation of pH-oscillations in closed chemical systems: Method and applications

Eszter Poros, Viktor Horváth, Krisztina Kurin-Csörgei, Irving R. Epstein, Miklós Orbán

Research output: Contribution to journalArticle

33 Citations (Scopus)


All pH-oscillators reported to date function only under open (flow reactor) conditions. We describe an approach to generating pH-oscillations in a closed system by starting from an open system pH-oscillator, finding semibatch conditions under which it oscillates with an inflow of a single reactant to an otherwise closed reactor containing the remaining components, and replacing this inflow with a layer of silica gel impregnated with the key reactant. We present data showing the successful application of this technique to the BrO 3-Mn2+-SO32-, IO3-Fe(CN) 64-SO32-, and BrO 3-Fe(CN)64-SO32- systems. In all three cases, sulfite ion is the species that is replenished via dissolution from the gel layer.

Original languageEnglish
Pages (from-to)7174-7179
Number of pages6
JournalJournal of the American Chemical Society
Issue number18
Publication statusPublished - May 11 2011

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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