US 10,800,987 B2 · Composite iron-sodium catalyst for coal gasification

Abstract

Embodiments described herein generally relate to a composite carbonate utilized as a catalyst in coal gasification processes. Methods described herein also include suitable processing conditions for performing coal gasification with the composite catalyst. In certain embodiments the composite catalyst may comprise an alkali carbonate and a transition metal carbonate, for example, an FeCO3—Na2CO3 catalyst. An FeCO3—Na2CO3 catalyst, compared to raw coal, may increase the carbon conversion rate by about two times within the 700° C.-800° C. range due to its ability to reduce the activation energy of gasification by about 30-40%. Compared to pure sodium and pure iron catalysts, the composite catalyst may increase the yields of desired products H2 and CO at 800° C. by 14.8% and 40.2%, respectively.

Claims13

Dependent claims

A coal gasification method, comprising:

forming a reaction mixture comprising a coal derived powder and a composite catalyst by mixing the coal derived powder and the composite catalyst, wherein the composite catalyst comprises FeCO3 and Na2CO3;
heating the reaction mixture to a target temperature between about 700° C. and about 900° C.;
contacting the reaction mixture with steam;
flowing the reaction mixture and the steam into a gasifier;
flowing nitrogen into the gasifier;
maintaining a pressure of the gasifier below 1 atm;
and
forming a syngas mixture from the reaction mixture.

5 more elements

Dependencies are inferred from the claim text.

Composite iron-sodium catalyst for coal gasification

Life of this patent

Composite iron-sodium catalyst for coal gasification

Life of this patent

Abstract

Claims13