Refining of raw gas - Patent 0310584

(19)

(11)

EP 0 310 584 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.03.1990 Bulletin 1990/11

(43)	Date of publication A2:
	05.04.1989 Bulletin 1989/14

(21)	Application number: 88850323.2

(22)	Date of filing: 28.09.1988

(51)	International Patent Classification (IPC)⁴: C10J 3/84, C10K 1/00, C10K 1/20

(84)	Designated Contracting States:
	AT BE CH DE ES FR GB GR IT LI LU NL SE

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Priority:

02.10.1987 SE 8703816

(71)	Applicant: TPS Termiska Processer Aktiebolag
	S-611 82 Nyköping (SE)

(72)	Inventors:
	Ekström, Clas S-122 36 Stockholm (SE) Espenäs, Bengt-Göran S-611 62 Nyköping (SE) Kowalic, Waclaw S-127 40 Skärholmen (SE) Rensfelt, Erik S-611 63 Nyköping (SE) Waldheim, Lars S-127 38 Skärholmen (SE)

(74)	Representative: Henningsson, Gunnar et al
	AWAPATENT AB, Box 45086 104 30 Stockholm 104 30 Stockholm (SE)

(56)

References cited: :

(54)	Refining of raw gas

(57) The invention relates to a process for the refining of a raw gas produced from a carbonaceous material by means of a gasification process, refining taking place in a secondary stage separated from the gasifier. In order to reduce the gas contents of tar in the form of organic compounds condensible at lower temperatures, such as ambient temperatures, and of ammonia, the refining is carried out in a secondary stage being a fast circulating fluidized bed, the bed material of which at least mainly being an active material in the form of a material that is catalytic for tar and ammonia conversion, whereby a catalytic conversion of tar and ammonia contained in the raw gas is obtained. In order to decrease the content of hydrogen chloride in the gas, an active material that also can absorb chloride is used. Fresh catalytic and absorbing material is supplied in an amount sufficient to have the hydrogen chloride present in the raw gas absorbed on the material, a corresponding amount of the material containing absorbed chloride being discharged from the secondary stage.

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