Chemistry of inorganic compounds – Hydrogen or compound thereof – Elemental hydrogen
Reexamination Certificate
2006-09-12
2006-09-12
Silverman, Stanley S. (Department: 1754)
Chemistry of inorganic compounds
Hydrogen or compound thereof
Elemental hydrogen
C423S650000, C423S651000, C423S418200, C252S373000
Reexamination Certificate
active
07105147
ABSTRACT:
Methane in a feedstock gas having methane as its main component, is partially oxidized with oxygen, which selectively permeates from a first side to a second side of a oxygen selective permeation ceramic membrane. Air is contacted with the first side of the oxygen selective permeation ceramic membrane, and the feedstock gas containing methane is contacted with the second side of the oxygen selective permeation ceramic membrane. A first catalyst for partial oxidation of methane is disposed two-dimensionally on the second side of the oxygen selective permeation ceramic membrane, and a second catalyst for partial oxidation of methane is disposed three-dimensionally in the feedstock gas stream downstream from the first catalyst. Furthermore, steam is mixed into the feedstock gas stream at a ratio of 0.25 to 0.5 moles of steam based on the moles of carbon in the feedstock gas.
REFERENCES:
patent: 5306411 (1994-04-01), Mazanec et al.
patent: 5725218 (1998-03-01), Maiya et al.
patent: 5980840 (1999-11-01), Kleefisch et al.
patent: 6010614 (2000-01-01), Keskar et al.
patent: 6033632 (2000-03-01), Schwartz et al.
patent: 6458334 (2002-10-01), Tamhankar et al.
patent: 6689294 (2004-02-01), Seier Christensen et al.
patent: 2002/0013227 (2002-01-01), Dindi et al.
patent: 0 882 670 (1998-12-01), None
patent: 0 926 097 (1999-06-01), None
patent: 0 962 422 (1999-12-01), None
patent: 0 962 423 (1999-12-01), None
patent: 06-135703 (1994-05-01), None
patent: 11-070314 (1999-03-01), None
patent: 2000-000469 (2000-01-01), None
patent: 98/41394 (1998-09-01), None
patent: 98/48921 (1998-11-01), None
patent: 99/21640 (1999-05-01), None
patent: 99/21649 (1999-05-01), None
Hayakawa et al., “Sustainable Ni/Ca1-xSrxTiO3Catalyst Prepared In Situ For The Partial Oxidation Of Methane To Synthesis Gas”, Applied Catalysis A: General, 149 (1997) 391-410.
Hayakawa et al., “Partial Oxidation Of Methane To Synthesis Gas Over Some Titanates Based Perovskite Oxides”, Catalysis Letters, 22 (1993) 307-317, Dec.
Takehira et al., “Partial Oxidation Of Methane To Synthesis Gas Over (Ca,Sr) (Ti,Ni) Oxides” Catalysis Today, 24 (1995) 237-242.
Kaganoi Shoichi
Kurimura Hideki
Suzuki Yohei
Jacobson & Holman PLLC
Silverman Stanley S.
Teïkokuoil Co., Ltd.
Vanoy Timothy C.
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