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Process and system for converting carbonaceous feedstocks into energy without greenhouse gas emissions

  • US 6,187,465 B1
  • Filed: 11/05/1998
  • Issued: 02/13/2001
  • Est. Priority Date: 11/07/1997
  • Status: Expired due to Term
First Claim
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1. A process for convering carbonaceous feedstock into energy without the production of greenhouse gas emissions comprising:

  • (a) converting a carbonaceous feedstock selected from the group consisting of coal, hydrocarbon oil, natural gas, petroleum coke, oil shale, carbonaceous-containing waste oil, carbonaceous-containing hazardous waste, carbonaceous-containing medical waste, and mixtures thereof and a greenhouse gas stream in a gasification unit to synthesis gas comprising carbon monoxide and hydrogen;

    (b) electrochemically oxidizing at least a portion of said synthesis gas from said gasification unit in a first half-cell of a fuel cell to a first half-cell exit comprising carbon dioxide and water;

    (c) recovering the carbon dioxide from said first half-cell exit gas to serve as at least a portion of said greenhouse gas stream in step (a); and

    (d) electrochemically reducing an oxygen-containing gas in a second half-cell of said fuel cell completing the circuit and resulting in the production of electrical energy.

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