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System and method for producing substitute natural gas from coal

  • US 8,236,072 B2
  • Filed: 02/08/2007
  • Issued: 08/07/2012
  • Est. Priority Date: 02/08/2007
  • Status: Expired due to Fees
First Claim
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1. A system for producing substitute natural gas and electricity, the system comprising:

  • a hydrogasification reactor for reacting hydrogen with coal;

    a gas product stream comprising methane in fluid communication with the hydrogasification reactor;

    an ash stream in communication with the hydrogasification reactor;

    an electrolysis reactor;

    a hydrogen source coupled to the hydrogasification reactor and the electrolysis reactor;

    a coal source coupled to the hydrogasification reactor;

    an oxygen burner, to react the ash stream with oxygen, coupled to an outlet of the hydrogasification reactor;

    an oxygen source coupled to the oxygen burner and the hydrogasification reactor;

    and an algae farm coupled to an output of the oxygen burner.

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