METHOD AND APPARATUS FOR REDUCTION OF TAR IN GASIFICATION OF CARBONACEOUS MATERIALS

A method and assembly for producing substantially tar free product gas from gasification of carbonaceous material. The assembly preferably includes a first stage gasifier to produce char-ash and tar laden product gas and a second stage gasifier which has a char-ash heating zone, at least one cyclone...

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Bibliographic Details
Main Authors SMEENK, JEROD, PASKACH, THOMAS, J
Format Patent
LanguageEnglish
French
German
Published 11.02.2015
Subjects
CARBURETTING AIR OR OTHER GASES
CHEMISTRY
FUELS
LUBRICANTS
METALLURGY
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROMSOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES
TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Summary:A method and assembly for producing substantially tar free product gas from gasification of carbonaceous material. The assembly preferably includes a first stage gasifier to produce char-ash and tar laden product gas and a second stage gasifier which has a char-ash heating zone, at least one cyclone, and at least one standpipe for the purpose of allowing selective delivery of char-ash to the char-ash heating zone. A char-ash heating zone that utilizes oxidation of char-ash is preferred and this results in the heat required to convert tar, additional yield of product gas, and an oxidized, activated carbon surface to facilitate tar conversion in the riser, thereby reducing the temperature required to achieve the desired tar conversion. Alternatively, external heat is supplied to the heating zone.
Bibliography:Application Number: EP20120873839