| US 7,566,441 B2 | ||
| Methods of conducting catalytic combustion in a multizone reactor, and a method of making a thermally stable catalyst support | ||
| Francis P. Daly, Delaware, Ohio (US); Junko M. Watson, Columbus, Ohio (US); Yong Wang, Richland, Wash. (US); Jianli Hu, Kennewick, Wash. (US); Chunshe Cao, Kennewick, Wash. (US); Richard Long, New Albany, Ohio (US); and Rachid Taha, Dublin, Ohio (US) | ||
| Assigned to Velocys, Plain City, Ohio (US) | ||
| Filed on Oct. 15, 2004, as Appl. No. 10/966,158. | ||
| Prior Publication US 2006/0083672 A1, Apr. 20, 2006 | ||
| Int. Cl. C07C 1/02 (2006.01); C01B 3/26 (2006.01); F23C 13/00 (2006.01) | ||
| U.S. Cl. 423—652 [423/651; 252/373] | 34 Claims |
| 1. A method of reacting a fuel composition, comprising:
in a reactor with three zones positioned such that a gas can travel from a first zone to a second zone and then to a third
zone;
passing a first gas composition comprising 60-90 parts (by mole) hydrocarbon, 35-60 parts CO, 100-160 parts H2 and 90-140 parts O2;
reacting the first gas composition in the first zone over a first solid catalyst in the first zone to form a first product
gas comprising H2O and CO;
wherein oxygen conversion in the first zone is greater than 90%, wherein oxygen selectivity for the conversion of H2 to H2O is less than 80% and wherein, in the first zone, oxygen selectivity for the conversion of hydrocarbon to CO is the same
as or greater than the oxygen selectivity for the conversion of CO to CO2;
passing the first product gas into the second zone;
reacting a second gas composition in the second zone over a second solid catalyst in the second zone to form a second product
gas comprising H2O and CO;
wherein the second gas composition comprises 10-70 parts (by mole) hydrocarbon, 40-80 parts CO, 20-100 parts H2 and 30-90 parts O2;
wherein the hydrocarbon conversion at the end of the second zone is 50% or greater, the CO conversion is 30% or less, wherein
oxygen selectivity for oxidation of hydrocarbon is 40% or greater;
passing the second product gas into the third zone;
reacting a third gas composition in the third zone over a third solid catalyst in the third zone to form a third product gas
comprising H2O and CO2;
wherein the third gas composition comprises 2-30 parts (by mole) hydrocarbon, 10-40 parts CO, 20-70 parts H2; and
wherein the hydrocarbon conversion at the end of the third zone is 95% or greater, the CO conversion is 95% or greater.
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