Methods and systems for utilizing carbide lime or slag

Devenney, Martin; Fernandez, Miguel; Chen, Irvin; Calas, Guillaume; Weiss, Michael Joseph; Tester, Chantel Cabrera

Methods and systems for utilizing carbide lime or slag

Patent · Tue Feb 27 00:00:00 EST 2018

OSTI ID:1423456

Devenney, Martin; Fernandez, Miguel; Chen, Irvin; Calas, Guillaume; Weiss, Michael Joseph; Tester, Chantel Cabrera

Provided herein are methods comprising a) treating a slag solid or carbide lime suspension with an ammonium salt in water to produce an aqueous solution comprising calcium salt, ammonium salt, and solids; b) contacting the aqueous solution with carbon dioxide from an industrial process under one or more precipitation conditions to produce a precipitation material comprising calcium carbonate and a supernatant aqueous solution wherein the precipitation material and the supernatant aqueous solution comprise residual ammonium salt; and c) removing and optionally recovering ammonia and/or ammonium salt using one or more steps of (i) recovering a gas exhaust stream comprising ammonia during the treating and/or the contacting step; (ii) recovering the residual ammonium salt from the supernatant aqueous solution; and (iii) removing and optionally recovering the residual ammonium salt from the precipitation material.

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Research Organization:: National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FE0002472

Assignee:: CALERA CORPORATION (Moss Landing, CA)

Patent Number(s):: 9,902,652

OSTI ID:: 1423456

Country of Publication:: United States

Language:: English

References (17)

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