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Title: Methods and systems for utilizing carbide lime or slag

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.
Inventors:
; ; ; ; ;
Issue Date:
OSTI Identifier:
1423456
Assignee:
CALERA CORPORATION (Moss Landing, CA) NETL
Patent Number(s):
9,902,652
Contract Number:
FE0002472
Resource Relation:
Patent File Date: 2015 Apr 23
Research Org:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English

Works referenced in this record: