Zirconia

Selective oxidation catalyst for removal of tar and ammonia from biomass gasification gas

Sami J. Juutilainen (Corresponding Author), Pekka A. Simell, Outi Krause

Research output: Contribution to journalArticleScientificpeer-review

77 Citations (Scopus)

Abstract

Catalysts containing zirconia and alumina were tested for their activity in the selective oxidation of tar and ammonia in biomass gasification gas. Their performance was compared with that of nickel and dolomite catalysts. Synthetic gasification gas with toluene as tar model compound was used as feed. In the presence of oxygen, zirconia and alumina-doped zirconia gave high toluene and ammonia conversions even below 600 °C. They were the most active catalysts for toluene oxidation below 700 °C and for ammonia oxidation below 650 °C. At higher temperatures than these, the impregnated ZrO2/Al2O3 catalysts performed better: oxidation selectivity was improved and toluene and ammonia conversions were higher. The presence of both zirconia and alumina in the catalyst promoted toluene and ammonia conversions at low temperatures: zirconia enhanced the oxidation activity, while alumina improved the oxidation selectivity. The presence of H2S had little effect on the activity of alumina-doped zirconia.
Original languageEnglish
Pages (from-to)86-92
Number of pages7
JournalApplied Catalysis B: Environmental
Volume62
Issue number1-2
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

Fingerprint

Tars
Tar
tar
Gasification
Ammonia
Aluminum Oxide
Zirconia
Toluene
Biomass
toluene
aluminum oxide
ammonia
Gases
catalyst
Alumina
oxidation
Oxidation
Catalysts
biomass
gas

Keywords

  • gasification

Cite this

Juutilainen, Sami J. ; Simell, Pekka A. ; Krause, Outi. / Zirconia : Selective oxidation catalyst for removal of tar and ammonia from biomass gasification gas. In: Applied Catalysis B: Environmental. 2006 ; Vol. 62, No. 1-2. pp. 86-92.
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title = "Zirconia: Selective oxidation catalyst for removal of tar and ammonia from biomass gasification gas",
abstract = "Catalysts containing zirconia and alumina were tested for their activity in the selective oxidation of tar and ammonia in biomass gasification gas. Their performance was compared with that of nickel and dolomite catalysts. Synthetic gasification gas with toluene as tar model compound was used as feed. In the presence of oxygen, zirconia and alumina-doped zirconia gave high toluene and ammonia conversions even below 600 °C. They were the most active catalysts for toluene oxidation below 700 °C and for ammonia oxidation below 650 °C. At higher temperatures than these, the impregnated ZrO2/Al2O3 catalysts performed better: oxidation selectivity was improved and toluene and ammonia conversions were higher. The presence of both zirconia and alumina in the catalyst promoted toluene and ammonia conversions at low temperatures: zirconia enhanced the oxidation activity, while alumina improved the oxidation selectivity. The presence of H2S had little effect on the activity of alumina-doped zirconia.",
keywords = "gasification",
author = "Juutilainen, {Sami J.} and Simell, {Pekka A.} and Outi Krause",
year = "2006",
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language = "English",
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pages = "86--92",
journal = "Applied Catalysis B: Environmental",
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Zirconia : Selective oxidation catalyst for removal of tar and ammonia from biomass gasification gas. / Juutilainen, Sami J. (Corresponding Author); Simell, Pekka A.; Krause, Outi.

In: Applied Catalysis B: Environmental, Vol. 62, No. 1-2, 2006, p. 86-92.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Zirconia

T2 - Selective oxidation catalyst for removal of tar and ammonia from biomass gasification gas

AU - Juutilainen, Sami J.

AU - Simell, Pekka A.

AU - Krause, Outi

PY - 2006

Y1 - 2006

N2 - Catalysts containing zirconia and alumina were tested for their activity in the selective oxidation of tar and ammonia in biomass gasification gas. Their performance was compared with that of nickel and dolomite catalysts. Synthetic gasification gas with toluene as tar model compound was used as feed. In the presence of oxygen, zirconia and alumina-doped zirconia gave high toluene and ammonia conversions even below 600 °C. They were the most active catalysts for toluene oxidation below 700 °C and for ammonia oxidation below 650 °C. At higher temperatures than these, the impregnated ZrO2/Al2O3 catalysts performed better: oxidation selectivity was improved and toluene and ammonia conversions were higher. The presence of both zirconia and alumina in the catalyst promoted toluene and ammonia conversions at low temperatures: zirconia enhanced the oxidation activity, while alumina improved the oxidation selectivity. The presence of H2S had little effect on the activity of alumina-doped zirconia.

AB - Catalysts containing zirconia and alumina were tested for their activity in the selective oxidation of tar and ammonia in biomass gasification gas. Their performance was compared with that of nickel and dolomite catalysts. Synthetic gasification gas with toluene as tar model compound was used as feed. In the presence of oxygen, zirconia and alumina-doped zirconia gave high toluene and ammonia conversions even below 600 °C. They were the most active catalysts for toluene oxidation below 700 °C and for ammonia oxidation below 650 °C. At higher temperatures than these, the impregnated ZrO2/Al2O3 catalysts performed better: oxidation selectivity was improved and toluene and ammonia conversions were higher. The presence of both zirconia and alumina in the catalyst promoted toluene and ammonia conversions at low temperatures: zirconia enhanced the oxidation activity, while alumina improved the oxidation selectivity. The presence of H2S had little effect on the activity of alumina-doped zirconia.

KW - gasification

U2 - 10.1016/j.apcatb.2005.05.009

DO - 10.1016/j.apcatb.2005.05.009

M3 - Article

VL - 62

SP - 86

EP - 92

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

SN - 0926-3373

IS - 1-2

ER -