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Coal compositions for catalytic gasification

  • US 8,297,542 B2
  • Filed: 02/27/2009
  • Issued: 10/30/2012
  • Est. Priority Date: 02/29/2008
  • Status: Active Grant
First Claim
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1. A process for preparing a particulate composition, the process comprising the steps of:

  • (a) providing a first coal feedstock, a second coal feedstock, and a third coal feedstock, each in particulate form;

    (b) contacting the first coal feedstock with a first aqueous solution comprising a transition metal gasification catalyst to form a first slurry;

    (c) contacting the second coal feedstock with a second aqueous solution comprising alkaline earth metal source to form a second slurry;

    (d) contacting the third coal feedstock with a third aqueous solution comprising an alkali metal gasification catalyst to form a third slurry; and

    (e) dewatering the first slurry, the second slurry, and the third slurry to form a first wet cake, a second wet cake, and a third wet cake, respectively;

    wherein the process comprises the further steps of (1) or (2);

    (1) (f1) thermally treating the first wet cake, the second wet cake, and the third wet cake with a dry inert gas to provide a first particulate, a second particulate, and a third particulate, each having a residual moisture content of less than about 4 wt %; and

    (g1) blending at least a portion of the first particulate, at least a portion of the second particulate, and at least a portion of the third particulate to form a particulate composition;

    or(2) (f2) combining at least a portion of the first wet cake, at least a portion of the second wet cake, and at least a portion of the third wet cake to form a final wet cake;

    (g2) thermally treating the final wet cake with a dry inert gas to provide a particulate composition having a residual moisture content of less than about 4 wt %.

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