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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


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Requested Product

Title: Method and Apparatus to Produce Synthesis Gas Via Flash Pyrolysis and Gasification in a Molten Liquid

Source: U.S. Patent 7,875,090 B2. January 25, 2011. 29 pgs. Int. Classif. C01B 3/36.

Author(s)Dietenberger, Mark; Anderson, Mark

Publication Year: 2013  View Document »

Category: Patents

Abstract: Disclosed are a method and a corresponding apparatus for converting a biomass reactant to synthesis gas. The method includes the steps of (1) heating biomass in a first molten liquid bath at a first temperature, wherein the first temperature is at least about 100°C., but less than the decomposition temperature of the biomass, wherein gas comprising water is evaporated and air pressed from the biomass, thereby yielding dried biomass with a minimal air content. (2) Recapturing the moisture evaporated from the biomass in step 1 for use in the process gas. (3) Heating the dried biomass in a second molten liquid bath at a second temperature, where in the second temperature is sufficiently high to cause flash pyrolysis of char. (4) Inserting recaptured steam into the process gas, which may optionally include external natural gas or hydrogen as or recycled syngas for mixing and reforming with tar and non-condensable gases. (5) Further reacting the product gases, tar, and char with the process gas within a third molten liquid bath at a third temperature which is equal to tor greater than the second temperature within the second molten liquid bath, thereby yielding high quality and relatively clean synthesis gas after a relatively long residence time needed for char gasification. A portion of the synthesis gas o formed is combusted to heat the first, second, and third molten liquid baths, unless external natural or hydrogen gas is available for this use.

Keywords: biomass, synthesis gas, conversion, flash pyrolysis, molten liquid

Date posted: 10/24/2013
RITS Product ID: 66620
Current FPL Scientist associated with this product
Dietenberger, Mark A.
Research General Engineer

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