Gas: heating and illuminating – Processes – Fuel mixtures
Reexamination Certificate
2011-01-25
2011-01-25
Neckel, Alexa D (Department: 1723)
Gas: heating and illuminating
Processes
Fuel mixtures
C048S061000, C423S648100, C423S655000, C202S219000
Reexamination Certificate
active
07875090
ABSTRACT:
Disclosed are a method and a corresponding apparatus for converting a biomass reactant into 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 is pressed from the biomass, thereby yielding dried biomass with 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, wherein the second temperature is sufficiently high to cause flash pyrolysis of the dried biomass, thereby yielding product gases, tar, and char. (4) Inserting recaptured steam into the process gas, which may optionally include external natural gas or hydrogen gas 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 or 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 so formed is combusted to heat the first, second, and third molten liquid baths, unless external natural or hydrogen gas is available for this use.
REFERENCES:
patent: 3647379 (1972-03-01), Wenzel et al.
patent: 4126668 (1978-11-01), Erickson
patent: 4344773 (1982-08-01), Paschen et al.
patent: 4345990 (1982-08-01), Fahlstrom et al.
patent: 4406666 (1983-09-01), Paschen et al.
patent: 4591362 (1986-05-01), Yudovich et al.
patent: 4649867 (1987-03-01), Cordier et al.
patent: 4925532 (1990-05-01), Meuser et al.
patent: 5085738 (1992-02-01), Harris et al.
patent: 5478370 (1995-12-01), Spangler
patent: 5693188 (1997-12-01), Donnohue et al.
patent: 5728271 (1998-03-01), Piskorz et al.
patent: 6051110 (2000-04-01), Dell'Orfano et al.
patent: 6110239 (2000-08-01), Malone et al.
patent: 6663681 (2003-12-01), Kindig et al.
patent: 6830597 (2004-12-01), Green
patent: 6863878 (2005-03-01), Klepper
patent: 2001/0011438 (2001-08-01), Fujimura et al.
patent: 2002/0082458 (2002-06-01), Peters et al.
patent: 2005/0032920 (2005-02-01), Norbeck et al.
Agrawal, Singh, Riberio & Delgass, (Mar. 14, 2007) “Sustainable Fuels for the Transportation Sector,” Proceedings of the National Academy of Sciences, doi:10.1073/pnas.0609921104.
Anderson et al. (2005), “Liquid-Metal/Water Direct Contact Heat Exchange: Flow Visualization, Flow Stability, and Heat Transfer Using Real-Time X-Ray Imaging,” Nuclear Science and Engineering, 150:182-220.
Dietenberger (2002), “Update for Combustion Properties on Wood Components,” Fire and Materials Journal, 26:255-267.
Henrich & Dinjus (2002), “Tar-free, high pressure synthesis gas from biomass,” Expert Meeting on Pyrolysis and Gasification of Biomass, Strasbourg, France Sep. 30 to Oct. 1.
Fushimi et al. (2003), Effect of Heating Rate on Steam Gasification of Biomass. 2. Thermogravimetric-Mass Spectrometric (TG-MS) Analysis of Gas Evolution,Ind. Eng. Chem. Res.,42:3929-3936.
Anderson Mark H.
Dietenberger Mark A.
DeWitt Ross & Stevens S.C.
Leone, Esq. Joseph T.
Merkling Matthew J
Neckel Alexa D
The United States of America as represented by the Secretary of
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