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US 10,093,874 B2Granted
Coal gasification with FeCO3 catalyst
AssigneeUniversity of Wyoming
InventorsMaohong Fan, Rodolfo Monterrozo
Life of this patent
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Abstract
Embodiments described herein generally relate to iron carbonate utilized as a catalyst in coal gasification processes. An FeCO3 catalyst is active in both pyrolysis and gasification operations, and may increase carbon conversion rate and reduce the activation energy of coal gasification. Methods described herein also include suitable processing conditions for performing coal gasification with the FeCO3 catalyst.
Claims20
A coal gasification method, comprising:
- mixing a coal derived solid with an iron carbonate catalyst to form a reaction mixture, wherein the iron carbonate catalyst is present in the reaction mixture at a concentration of between 1 wt % and 5 wt %;
- disposing the reaction mixture in a gasifier;
- heating the reaction mixture to a target temperature between 700° C. and 900° C.;
- contacting the reaction mixture with water vapor;
- maintaining a pressure of the gasifier below 1 atm;
- and
- forming a syngas mixture from the reaction mixture.
4 more elements
A coal gasification method, comprising:
- mixing a coal derived powder with a calcined iron carbonate catalyst to form a reaction mixture, wherein the calcined iron carbonate catalyst is present in the reaction mixture at a concentration of between 1 wt % and 5 wt %;
- heating the reaction mixture to a target temperature between 700° C. and 900° C.;
- contacting the reaction mixture with steam;
- flowing the reaction mixture and the steam into a gasifier;
- flowing nitrogen consisting essentially of 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
A method of forming syngas from coal, comprising:
- mixing a powdered coal having a moisture content of at least 10 wt % with 3 wt % of a FeCO3 catalyst to form a reaction mixture;
- blending a stoichiometric excess of water vapor with the reaction mixture;
- disposing the reaction mixture in a gasifier;
- flowing nitrogen consisting essentially of nitrogen into the gasifier;
- and
- maintaining a temperature of the reaction mixture between 700° C. and 900° C. until a syngas mixture is formed.
3 more elements
Dependencies are inferred from the claim text.