초록 ▼

Methods and systems are provided for producing syngas utilizing heat from thermochemical conversion of a carbonaceous fuel to support decomposition of at least one of water and carbon dioxide using one or more solid-oxide electrolysis cells. Simultaneous decomposition of carbon dioxide and water or

Methods and systems are provided for producing syngas utilizing heat from thermochemical conversion of a carbonaceous fuel to support decomposition of at least one of water and carbon dioxide using one or more solid-oxide electrolysis cells. Simultaneous decomposition of carbon dioxide and water or steam by one or more solid-oxide electrolysis cells may be employed to produce hydrogen and carbon monoxide. A portion of oxygen produced from at least one of water and carbon dioxide using one or more solid-oxide electrolysis cells is fed at a controlled flow rate in a gasifier or combustor to oxidize the carbonaceous fuel to control the carbon dioxide to carbon monoxide ratio produced.

대표청구항 ▼

1. A method for forming syngas, comprising: producing heat and a mixed gas comprising carbon dioxide, carbon monoxide, water and hydrogen by gasifying a carbonaceous fuel;condensing the mixed gas to remove at least one impurity from the mixed gas and to generate a feed stream;after the condensing ac

1. A method for forming syngas, comprising: producing heat and a mixed gas comprising carbon dioxide, carbon monoxide, water and hydrogen by gasifying a carbonaceous fuel;condensing the mixed gas to remove at least one impurity from the mixed gas and to generate a feed stream;after the condensing act, transferring the heat produced by gasifying the carbonaceous fuel to the feed stream to convert at least a portion of the water in the feed stream to steam;introducing the feed stream to at least one solid-oxide electrolysis cell;electrolyzing carbon dioxide and steam in the feed stream in at least one solid-oxide electrolysis cell to produce carbon monoxide, hydrogen and oxygen; andseparating the carbon monoxide and hydrogen from the oxygen. 2. The method of claim 1, further comprising transferring heat from the carbon monoxide, hydrogen and oxygen produced in the at least one solid-oxide electrolysis cell to the feed stream. 3. The method of claim 1, further comprising contacting the mixed gas with a water stream having a temperature substantially lower than a temperature of the mixed gas to cool the mixed gas. 4. The method of claim 1, wherein producing heat and a mixed gas comprising carbon dioxide, carbon monoxide, water and hydrogen by gasifying a carbonaceous fuel comprises gasifying the carbonaceous fuel in the presence of a portion of the oxygen formed by electrolyzing carbon dioxide and steam to control a ratio of carbon monoxide and hydrogen produced by electrolyzing the carbon dioxide and the steam.