Effect of gasification gas components on naphthalene decomposition over ZrO2

Hanne Rönkkönen (Corresponding Author), Emma Rikkinen, Juha Linnekoski, Pekka Simell, Matti Reinikainen, Outi Krause

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

One of the main challenges for biomass gasification is to remove the produced tar from the product gas. Cleaning of the gasification gas is essential, because tar may cause operational problems in downstream processes. In this study naphthalene was used as a tar model compound. The effects of the main components of the gasification gas on the naphthalene decomposition activity of ZrO2 were studied. Without O2 in the gasification gas feed the conversion of naphthalene was below 10% at the studied temperature range (600–900 °C), indicating that the main reactions in naphthalene decomposition on ZrO2 are oxidations. Furthermore, the higher the O2 concentration in the feed, the higher was the naphthalene conversion. Moreover, naphthalene conversion was higher when only O2 and naphthalene (with CO2 as a carrier gas) was fed into the reactor compared to the gasification gas feed. Thus, the presence of the gasification gas components lowers the oxidation of naphthalene. Especially water (at 700 °C) but also hydrogen and carbon monoxide (at 800–900 °C) were found to inhibit the naphthalene oxidation reactions, whereas ammonia had no discernible effect on the naphthalene conversion. The reactions of naphthalene at the studied conditions are occurring not only catalytically but thermal reactions have a significant role at temperatures above 700 °C.
Original languageEnglish
Pages (from-to)S230-S236
Number of pages7
JournalCatalysis Today
Volume147
Issue numberSupplement 1
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed
Event3rd International Conference on Structured Catalysts and Reactors - Ischia, Italy
Duration: 27 Sep 200930 Sep 2009

Fingerprint

Naphthalene
Gasification
Gases
Decomposition
Tars
Tar
Oxidation
naphthalene
Carbon Monoxide
Ammonia
Carbon monoxide
Hydrogen
Cleaning
Biomass
Thermodynamic properties
Temperature
Water

Keywords

  • gas clean-up
  • gasification
  • zirconia
  • naphthalene
  • tar removal

Cite this

Rönkkönen, Hanne ; Rikkinen, Emma ; Linnekoski, Juha ; Simell, Pekka ; Reinikainen, Matti ; Krause, Outi. / Effect of gasification gas components on naphthalene decomposition over ZrO2. In: Catalysis Today. 2009 ; Vol. 147, No. Supplement 1. pp. S230-S236.
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abstract = "One of the main challenges for biomass gasification is to remove the produced tar from the product gas. Cleaning of the gasification gas is essential, because tar may cause operational problems in downstream processes. In this study naphthalene was used as a tar model compound. The effects of the main components of the gasification gas on the naphthalene decomposition activity of ZrO2 were studied. Without O2 in the gasification gas feed the conversion of naphthalene was below 10{\%} at the studied temperature range (600–900 °C), indicating that the main reactions in naphthalene decomposition on ZrO2 are oxidations. Furthermore, the higher the O2 concentration in the feed, the higher was the naphthalene conversion. Moreover, naphthalene conversion was higher when only O2 and naphthalene (with CO2 as a carrier gas) was fed into the reactor compared to the gasification gas feed. Thus, the presence of the gasification gas components lowers the oxidation of naphthalene. Especially water (at 700 °C) but also hydrogen and carbon monoxide (at 800–900 °C) were found to inhibit the naphthalene oxidation reactions, whereas ammonia had no discernible effect on the naphthalene conversion. The reactions of naphthalene at the studied conditions are occurring not only catalytically but thermal reactions have a significant role at temperatures above 700 °C.",
keywords = "gas clean-up, gasification, zirconia, naphthalene, tar removal",
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Rönkkönen, H, Rikkinen, E, Linnekoski, J, Simell, P, Reinikainen, M & Krause, O 2009, 'Effect of gasification gas components on naphthalene decomposition over ZrO2', Catalysis Today, vol. 147, no. Supplement 1, pp. S230-S236. https://doi.org/10.1016/j.cattod.2009.07.044

Effect of gasification gas components on naphthalene decomposition over ZrO2. / Rönkkönen, Hanne (Corresponding Author); Rikkinen, Emma; Linnekoski, Juha; Simell, Pekka; Reinikainen, Matti; Krause, Outi.

In: Catalysis Today, Vol. 147, No. Supplement 1, 2009, p. S230-S236.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of gasification gas components on naphthalene decomposition over ZrO2

AU - Rönkkönen, Hanne

AU - Rikkinen, Emma

AU - Linnekoski, Juha

AU - Simell, Pekka

AU - Reinikainen, Matti

AU - Krause, Outi

PY - 2009

Y1 - 2009

N2 - One of the main challenges for biomass gasification is to remove the produced tar from the product gas. Cleaning of the gasification gas is essential, because tar may cause operational problems in downstream processes. In this study naphthalene was used as a tar model compound. The effects of the main components of the gasification gas on the naphthalene decomposition activity of ZrO2 were studied. Without O2 in the gasification gas feed the conversion of naphthalene was below 10% at the studied temperature range (600–900 °C), indicating that the main reactions in naphthalene decomposition on ZrO2 are oxidations. Furthermore, the higher the O2 concentration in the feed, the higher was the naphthalene conversion. Moreover, naphthalene conversion was higher when only O2 and naphthalene (with CO2 as a carrier gas) was fed into the reactor compared to the gasification gas feed. Thus, the presence of the gasification gas components lowers the oxidation of naphthalene. Especially water (at 700 °C) but also hydrogen and carbon monoxide (at 800–900 °C) were found to inhibit the naphthalene oxidation reactions, whereas ammonia had no discernible effect on the naphthalene conversion. The reactions of naphthalene at the studied conditions are occurring not only catalytically but thermal reactions have a significant role at temperatures above 700 °C.

AB - One of the main challenges for biomass gasification is to remove the produced tar from the product gas. Cleaning of the gasification gas is essential, because tar may cause operational problems in downstream processes. In this study naphthalene was used as a tar model compound. The effects of the main components of the gasification gas on the naphthalene decomposition activity of ZrO2 were studied. Without O2 in the gasification gas feed the conversion of naphthalene was below 10% at the studied temperature range (600–900 °C), indicating that the main reactions in naphthalene decomposition on ZrO2 are oxidations. Furthermore, the higher the O2 concentration in the feed, the higher was the naphthalene conversion. Moreover, naphthalene conversion was higher when only O2 and naphthalene (with CO2 as a carrier gas) was fed into the reactor compared to the gasification gas feed. Thus, the presence of the gasification gas components lowers the oxidation of naphthalene. Especially water (at 700 °C) but also hydrogen and carbon monoxide (at 800–900 °C) were found to inhibit the naphthalene oxidation reactions, whereas ammonia had no discernible effect on the naphthalene conversion. The reactions of naphthalene at the studied conditions are occurring not only catalytically but thermal reactions have a significant role at temperatures above 700 °C.

KW - gas clean-up

KW - gasification

KW - zirconia

KW - naphthalene

KW - tar removal

U2 - 10.1016/j.cattod.2009.07.044

DO - 10.1016/j.cattod.2009.07.044

M3 - Article

VL - 147

SP - S230-S236

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

IS - Supplement 1

ER -