Toluene Oxidation in the Absence and Presence of CO, CO2, Water and H2 over ZrO2-Based Gasification Gas Clean-Up Catalysts

Tiia S. Viinikainen, Juha S. Lehtonen

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Gasification of biomass is an environmentally friendly way to produce electricity and syngas when combined with effective gas cleaning. ZrO2-based catalysts have been proven to remove undesired tar molecules when a convenient amount of oxygen is added. However, high activity in the tar oxidation is not the only requirement for the catalyst performance. The valuable gasification gas components, such as CO and H2, must be protected while passing the complex gasification gas over the catalyst. Oxidation of toluene as a tar model compound was addressed by applying temperature-programmed surface reaction (TPSR) experiments with continuous feed of toluene, oxygen and one main gasification gas component (CO, CO2, H2 or water) over pure and doped zirconias. The most water tolerant catalyst was pure ZrO2 and the least was SiO2-ZrO2. A new indicator called ‘Preferentiality’ was introduced and it expresses in one single quantity how well the catalyst is performing in tar conversion while protecting the valuable components of the gas. At 600 °C, the highest preferentiality of toluene oxidation over both CO and H2 oxidation was achieved over pure ZrO2.

Original languageEnglish
Pages (from-to)1663-1670
Number of pages8
JournalChemistrySelect
Volume2
Issue number4
DOIs
Publication statusPublished - 1 Jan 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

Toluene
Carbon Monoxide
Tars
Gasification
Gases
Oxidation
Catalysts
Water
Oxygen
Surface reactions
Cleaning
Biomass
Electricity
Molecules
Experiments
Temperature

Keywords

  • Effect of main gasification gas components
  • Gasification gas cleaning
  • Toluene oxidation
  • Zirconia

Cite this

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Toluene Oxidation in the Absence and Presence of CO, CO2, Water and H2 over ZrO2-Based Gasification Gas Clean-Up Catalysts. / Viinikainen, Tiia S.; Lehtonen, Juha S.

In: ChemistrySelect, Vol. 2, No. 4, 01.01.2017, p. 1663-1670.

Research output: Contribution to journalArticleScientificpeer-review

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