Clean syngas from biomass-process development and concept assessment

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Abstract

This paper summarises the long development work done at VTT for gas clean-up for various synthesis applications. The development work has covered the most challenging and costly steps in biomass gasification based processes: high-temperature gas filtration and reforming of hydrocarbon gases and tars. The tar content of product gas is one of the main factors defining the temperature window in which the hot-gas filter can be operated, which in the case of fluidized-bed gasification is at 350-500 °C. Research is ongoing to achieve higher and thus more economical operation temperatures. Optimal operation of a catalytic reformer can be achieved by using a staged reformer where zirconia-based catalysts are used as a pre-reformer layer before nickel and/or precious metal-based catalyst stages. The temperature of the reformer is optimally increased in subsequent stages from 600 up to 1,000 °C. According to the techno-economic analysis, increasing the hot-gas filtration temperature by 300 °C or methane conversion in the reformer from 55 to 95 % both lead to about 5 % reduction the liquid fuel production cost
Original languageEnglish
Pages (from-to)357-370
JournalBiomass Conversion and Biorefinery
Volume4
Issue number4
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

Biomass
Gases
Tar
Gasification
Temperature
Catalysts
Economic analysis
Liquid fuels
Reforming reactions
Precious metals
Zirconia
Fluidized beds
Methane
Hydrocarbons
Nickel
Costs

Keywords

  • Biomass
  • gasification
  • hot gas filtration
  • tar reforming
  • gas clean-up
  • techno-economic evaluation

Cite this

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title = "Clean syngas from biomass-process development and concept assessment",
abstract = "This paper summarises the long development work done at VTT for gas clean-up for various synthesis applications. The development work has covered the most challenging and costly steps in biomass gasification based processes: high-temperature gas filtration and reforming of hydrocarbon gases and tars. The tar content of product gas is one of the main factors defining the temperature window in which the hot-gas filter can be operated, which in the case of fluidized-bed gasification is at 350-500 °C. Research is ongoing to achieve higher and thus more economical operation temperatures. Optimal operation of a catalytic reformer can be achieved by using a staged reformer where zirconia-based catalysts are used as a pre-reformer layer before nickel and/or precious metal-based catalyst stages. The temperature of the reformer is optimally increased in subsequent stages from 600 up to 1,000 °C. According to the techno-economic analysis, increasing the hot-gas filtration temperature by 300 °C or methane conversion in the reformer from 55 to 95 {\%} both lead to about 5 {\%} reduction the liquid fuel production cost",
keywords = "Biomass, gasification, hot gas filtration, tar reforming, gas clean-up, techno-economic evaluation",
author = "Pekka Simell and Ilkka Hannula and Sanna Tuomi and Matti Nieminen and Esa Kurkela and Ilkka Hiltunen and Noora Kaisalo and Johanna Kihlman",
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T1 - Clean syngas from biomass-process development and concept assessment

AU - Simell, Pekka

AU - Hannula, Ilkka

AU - Tuomi, Sanna

AU - Nieminen, Matti

AU - Kurkela, Esa

AU - Hiltunen, Ilkka

AU - Kaisalo, Noora

AU - Kihlman, Johanna

PY - 2014

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N2 - This paper summarises the long development work done at VTT for gas clean-up for various synthesis applications. The development work has covered the most challenging and costly steps in biomass gasification based processes: high-temperature gas filtration and reforming of hydrocarbon gases and tars. The tar content of product gas is one of the main factors defining the temperature window in which the hot-gas filter can be operated, which in the case of fluidized-bed gasification is at 350-500 °C. Research is ongoing to achieve higher and thus more economical operation temperatures. Optimal operation of a catalytic reformer can be achieved by using a staged reformer where zirconia-based catalysts are used as a pre-reformer layer before nickel and/or precious metal-based catalyst stages. The temperature of the reformer is optimally increased in subsequent stages from 600 up to 1,000 °C. According to the techno-economic analysis, increasing the hot-gas filtration temperature by 300 °C or methane conversion in the reformer from 55 to 95 % both lead to about 5 % reduction the liquid fuel production cost

AB - This paper summarises the long development work done at VTT for gas clean-up for various synthesis applications. The development work has covered the most challenging and costly steps in biomass gasification based processes: high-temperature gas filtration and reforming of hydrocarbon gases and tars. The tar content of product gas is one of the main factors defining the temperature window in which the hot-gas filter can be operated, which in the case of fluidized-bed gasification is at 350-500 °C. Research is ongoing to achieve higher and thus more economical operation temperatures. Optimal operation of a catalytic reformer can be achieved by using a staged reformer where zirconia-based catalysts are used as a pre-reformer layer before nickel and/or precious metal-based catalyst stages. The temperature of the reformer is optimally increased in subsequent stages from 600 up to 1,000 °C. According to the techno-economic analysis, increasing the hot-gas filtration temperature by 300 °C or methane conversion in the reformer from 55 to 95 % both lead to about 5 % reduction the liquid fuel production cost

KW - Biomass

KW - gasification

KW - hot gas filtration

KW - tar reforming

KW - gas clean-up

KW - techno-economic evaluation

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