Development of zirconia catalysts for hot gas cleanup

Anu Solla, Pekka Simell, Matti Reinikainen, Hanne Rönkkönen, Outi Krause, Heather Bradshaw, Hazel Stephenson, Gary Monks

Research output: Contribution to conferenceConference articleScientific

Abstract

Cleaning of gasification gas is essential, because tar may cause operational problems in downstream processes. Zirconia catalysts are active in tar decomposition with minor tendency to coking and deactivation by sulfur. This study describes the catalyst testing carried out in different scales. Ceramic monoliths were coated with slurries prepared from powders. At first the samples were made only for a small scale testing, after which a catalyst for slip-stream tests was selected. In the laboratory tests all the studied modified zirconias (undoped and three different dopants coded A, B, A-C) showed the activity of ca. 50 % in the tar decomposition already at 600°C. The maximum tar conversion with different dopants is reached at the temperature of 800 °C or higher. The most stable conversion at the measured temperature range was measured with the A-C zirconia, having tar conversion around 90%. The doping of zirconia has clearly a positive effect on the catalytic activity in tar decomposition. With the best dopant, a high conversion at the wide temperature range was measured giving flexibility in the process development of the catalytic reforming unit for the cleaning of the gasification gas.
Original languageEnglish
Publication statusPublished - 2007
MoE publication typeNot Eligible
EventEuropean Catalysis Conference, Europacat VIII - Turku, Finland
Duration: 26 Aug 200731 Aug 2007

Conference

ConferenceEuropean Catalysis Conference, Europacat VIII
CountryFinland
CityTurku
Period26/08/0731/08/07

Fingerprint

Tars
Gases
Catalysts
Doping (additives)
Decomposition
Gasification
Cleaning
Catalytic reforming
Coking
Slurries
Testing
Sulfur
Powders
Temperature
zirconium oxide
Catalyst activity

Keywords

  • zirconia
  • testing
  • gasification gas cleaning

Cite this

Solla, A., Simell, P., Reinikainen, M., Rönkkönen, H., Krause, O., Bradshaw, H., ... Monks, G. (2007). Development of zirconia catalysts for hot gas cleanup. Paper presented at European Catalysis Conference, Europacat VIII, Turku, Finland.
Solla, Anu ; Simell, Pekka ; Reinikainen, Matti ; Rönkkönen, Hanne ; Krause, Outi ; Bradshaw, Heather ; Stephenson, Hazel ; Monks, Gary. / Development of zirconia catalysts for hot gas cleanup. Paper presented at European Catalysis Conference, Europacat VIII, Turku, Finland.
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abstract = "Cleaning of gasification gas is essential, because tar may cause operational problems in downstream processes. Zirconia catalysts are active in tar decomposition with minor tendency to coking and deactivation by sulfur. This study describes the catalyst testing carried out in different scales. Ceramic monoliths were coated with slurries prepared from powders. At first the samples were made only for a small scale testing, after which a catalyst for slip-stream tests was selected. In the laboratory tests all the studied modified zirconias (undoped and three different dopants coded A, B, A-C) showed the activity of ca. 50 {\%} in the tar decomposition already at 600°C. The maximum tar conversion with different dopants is reached at the temperature of 800 °C or higher. The most stable conversion at the measured temperature range was measured with the A-C zirconia, having tar conversion around 90{\%}. The doping of zirconia has clearly a positive effect on the catalytic activity in tar decomposition. With the best dopant, a high conversion at the wide temperature range was measured giving flexibility in the process development of the catalytic reforming unit for the cleaning of the gasification gas.",
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author = "Anu Solla and Pekka Simell and Matti Reinikainen and Hanne R{\"o}nkk{\"o}nen and Outi Krause and Heather Bradshaw and Hazel Stephenson and Gary Monks",
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year = "2007",
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Solla, A, Simell, P, Reinikainen, M, Rönkkönen, H, Krause, O, Bradshaw, H, Stephenson, H & Monks, G 2007, 'Development of zirconia catalysts for hot gas cleanup' Paper presented at European Catalysis Conference, Europacat VIII, Turku, Finland, 26/08/07 - 31/08/07, .

Development of zirconia catalysts for hot gas cleanup. / Solla, Anu; Simell, Pekka; Reinikainen, Matti; Rönkkönen, Hanne; Krause, Outi; Bradshaw, Heather; Stephenson, Hazel; Monks, Gary.

2007. Paper presented at European Catalysis Conference, Europacat VIII, Turku, Finland.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

T1 - Development of zirconia catalysts for hot gas cleanup

AU - Solla, Anu

AU - Simell, Pekka

AU - Reinikainen, Matti

AU - Rönkkönen, Hanne

AU - Krause, Outi

AU - Bradshaw, Heather

AU - Stephenson, Hazel

AU - Monks, Gary

N1 - Project code: 3702-1.2

PY - 2007

Y1 - 2007

N2 - Cleaning of gasification gas is essential, because tar may cause operational problems in downstream processes. Zirconia catalysts are active in tar decomposition with minor tendency to coking and deactivation by sulfur. This study describes the catalyst testing carried out in different scales. Ceramic monoliths were coated with slurries prepared from powders. At first the samples were made only for a small scale testing, after which a catalyst for slip-stream tests was selected. In the laboratory tests all the studied modified zirconias (undoped and three different dopants coded A, B, A-C) showed the activity of ca. 50 % in the tar decomposition already at 600°C. The maximum tar conversion with different dopants is reached at the temperature of 800 °C or higher. The most stable conversion at the measured temperature range was measured with the A-C zirconia, having tar conversion around 90%. The doping of zirconia has clearly a positive effect on the catalytic activity in tar decomposition. With the best dopant, a high conversion at the wide temperature range was measured giving flexibility in the process development of the catalytic reforming unit for the cleaning of the gasification gas.

AB - Cleaning of gasification gas is essential, because tar may cause operational problems in downstream processes. Zirconia catalysts are active in tar decomposition with minor tendency to coking and deactivation by sulfur. This study describes the catalyst testing carried out in different scales. Ceramic monoliths were coated with slurries prepared from powders. At first the samples were made only for a small scale testing, after which a catalyst for slip-stream tests was selected. In the laboratory tests all the studied modified zirconias (undoped and three different dopants coded A, B, A-C) showed the activity of ca. 50 % in the tar decomposition already at 600°C. The maximum tar conversion with different dopants is reached at the temperature of 800 °C or higher. The most stable conversion at the measured temperature range was measured with the A-C zirconia, having tar conversion around 90%. The doping of zirconia has clearly a positive effect on the catalytic activity in tar decomposition. With the best dopant, a high conversion at the wide temperature range was measured giving flexibility in the process development of the catalytic reforming unit for the cleaning of the gasification gas.

KW - zirconia

KW - testing

KW - gasification gas cleaning

M3 - Conference article

ER -

Solla A, Simell P, Reinikainen M, Rönkkönen H, Krause O, Bradshaw H et al. Development of zirconia catalysts for hot gas cleanup. 2007. Paper presented at European Catalysis Conference, Europacat VIII, Turku, Finland.