Method and apparatus for removing impurities from gasification gas and use
AssigneeTeknologian tutkimuskeskus VTT Oy
InventorsIlkka Hiltunen, Esa Kurkela
Life of this patent
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Abstract
The invention relates to a method and an apparatus for removing impurities from a gasification gas, wherein the gasification gas which includes at least tars and/or undesired hydrocarbons is supplied to a catalytic reformer which has at least one catalyst bed, oxygen containing gas is injected onto the surface of the catalyst bed, the gasification gas is arranged to flow through the catalyst bed and arranged to contact with the oxygen containing gas in the catalyst bed, and a purified gas is discharged from the catalytic reformer. Further, the invention relates to the use of the method.
Claims14
A method for removing impurities from a gasification gas, wherein
- the gasification gas which comprises at least tars and/or undesired hydrocarbons is supplied to a catalytic reformer which comprises at least one catalyst bed formed of catalyst particles, and a feed rate of the gasification gas is 0.1-3 m/s to the catalyst bed,
- oxygen containing gas is injected directly onto a surface of the catalyst bed, and a feed rate of the oxygen containing gas is 20-90 m/s to the catalyst bed,
- the gasification gas is arranged to flow through the catalyst bed and arranged to contact with the oxygen containing gas in the catalyst bed and to not contact with the oxygen containing gas before the catalyst bed, in which the gasification gas reacts with the oxygen containing gas in the catalyst bed on surfaces of the catalyst particles of the catalyst bed or in pores of the catalyst particles of the catalyst bed, and
- a purified gas formed from the reaction of the gasification gas with the oxygen containing gas in the catalyst bed is discharged from the catalytic reformer, wherein a temperature of the purified gas is 850-950° C.
An apparatus for removing impurities from a gasification gas, wherein the apparatus comprises
- at least one catalytic reformer to which the gasification gas which comprises at least tars and/or undesired hydrocarbons is supplied, and the catalytic reformer comprises at least one catalyst bed formed of catalyst particles, and the gasification gas is arranged to flow with a feed rate of 0.1-3 m/s to the catalyst bed, and
- at least one injection device for injecting oxygen containing gas directly onto a surface of the catalyst bed so that the oxygen containing gas is arranged to flow with a feed rate of 20-90 m/s to the catalyst bed, and
- in the catalytic reformer the gasification gas is arranged to flow through the catalyst bed and arranged to contact with the oxygen containing gas in the catalyst bed and to not contact with the oxygen containing gas before the catalyst bed, in which the gasification gas reacts with the oxygen containing gas in the catalyst bed on surfaces of the catalyst particles of the catalyst bed or in pores of the catalyst particles of the catalyst bed, and in which a purified gas having temperature of 850-950° C. is formed from the reaction of the gasification gas with the oxygen containing gas in the catalyst bed and discharged from the catalytic reformer.
Dependencies are inferred from the claim text.