Beneficial use of carbon

摘要

Devices and methods for reacting carbon dioxide with ammonia to produce an ammonium bicarbonate containing product are disclosed. Further disclosed are methods and devices pertaining to the handling of ammonia, ammonium bicarbonate products, and waste products associated with that production.

主权项

1. A method of beneficially using carbon comprising:
contacting carbon dioxide with an amine in a first aqueous solution; precipitating a precipitate containing a substantial number of both carbon atoms and nitrogen atoms from the first aqueous solution; separating a solids rich fraction containing at least a fraction of the precipitate containing a substantial number of both carbon atoms and nitrogen atoms from a solids lean fraction; and adding at least a portion of the solids lean fraction to the first aqueous solution; wherein the amine is ammonia; wherein the ammonia is supplied by an ammonia supply line; wherein the precipitate containing a substantial number of both carbon atoms and nitrogen atoms contains ammonium bicarbonate and ammonium carbonate; wherein a portion of the ammonia is evolved from the first aqueous solution, captured in a pollution control aqueous solution, concentrated, and returned to the first aqueous solution; contacting at least a first portion of the ammonium bicarbonate from the solids rich fraction with a water soluble alcohol and dewatering a second portion of the ammonium bicarbonate from the solids rich fraction, wherein the first portion of the ammonium bicarbonate from the solids rich fraction and the second portion of the ammonium bicarbonate from the solids rich fraction have some ammonium bicarbonate in common; wherein at a point prior to separating the solids rich fraction, the ammonium bicarbonate in the solids rich fraction is greater than 95 weight percent of the total of ammonium bicarbonate and ammonium carbonate; wherein the contacting results in absorption of carbon dioxide; and wherein substantially all of the nitrogen from the ammonia supply line and substantially all of the carbon from the carbon dioxide absorbed are converted into a solid ammonium bicarbonate product; and wherein urea is applied to the solid ammonium bicarbonate product to produce a final product.