Three-stage energy-integrated product gas generation method
First Claim
1. A method for producing a H2, CO, and CO2 from a carbonaceous material using a first reactor, a second reactor, and a third reactor, the method comprising:
- (a) reacting carbonaceous material with a steam reactant in the first reactor and producing a first reactor product gas containing char;
(b) introducing at least a portion of the char generated in step (a) into the second reactor;
(c) reacting the char of step (b) with an oxygen-containing gas in the second reactor and producing a second reactor product gas;
(d) transferring the first reactor product gas generated in step (a) and the second reactor product gas generated in step (c) to the third reactor, to form a combined product gas;
(e) reacting the combined product gas with an oxygen-containing gas in the third reactor to generate a third reactor product gas and heat;
(f) transferring heat generated in step (e) to a heat transfer medium contained within a third reactor heat exchanger in thermal contact with the interior of the third reactor;
(g) transferring at least some of the heat transfer medium which has passed through the third reactor heat exchanger, to a second reactor heat exchanger in thermal contact with the interior of the second reactor; and
(h) introducing a first portion of the heat transfer medium which has passed through the second reactor heat exchanger, into the first reactor as the steam reactant of step (a).
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Accused Products
Abstract
A multi-stage product gas generation system converts a carbonaceous material, such as municipal solid waste, into a product gas which may subsequently be converted into a liquid fuel or other material. One or more reactors containing bed material may be used to conduct reactions to effect the conversions. Unreacted inert feedstock contaminants present in the carbonaceous material may be separated from bed material using a portion of the product gas. A heat transfer medium collecting heat from a reaction in one stage may be applied as a reactant input in another, earlier stage.
268 Citations
73 Claims
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1. A method for producing a H2, CO, and CO2 from a carbonaceous material using a first reactor, a second reactor, and a third reactor, the method comprising:
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(a) reacting carbonaceous material with a steam reactant in the first reactor and producing a first reactor product gas containing char; (b) introducing at least a portion of the char generated in step (a) into the second reactor; (c) reacting the char of step (b) with an oxygen-containing gas in the second reactor and producing a second reactor product gas; (d) transferring the first reactor product gas generated in step (a) and the second reactor product gas generated in step (c) to the third reactor, to form a combined product gas; (e) reacting the combined product gas with an oxygen-containing gas in the third reactor to generate a third reactor product gas and heat; (f) transferring heat generated in step (e) to a heat transfer medium contained within a third reactor heat exchanger in thermal contact with the interior of the third reactor; (g) transferring at least some of the heat transfer medium which has passed through the third reactor heat exchanger, to a second reactor heat exchanger in thermal contact with the interior of the second reactor; and (h) introducing a first portion of the heat transfer medium which has passed through the second reactor heat exchanger, into the first reactor as the steam reactant of step (a). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73)
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41. The method of step 67, comprising introducing the superheated heat transfer medium to a steam turbine having an integrated generator to produce power.
Specification