2011
DOI: 10.1002/ghg.37
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Ammonium salt‐based steelmaking slag carbonation: Precipitation of CaCO3 and ammonia losses assessment

Abstract: A mineral carbonation method based on steelmaking slags and ammonium salt solutions has been found to have economical and CO2 emission reduction potential. Although the aqueous solution of ammonium salt can be recycled, some of the solvent is likely to escape in a form of ammonia vapor within the outgoing gas flow during the carbonation step. In this study, the escape of ammonia vapor was investigated. The loss of NH3 was found to be quite insignificant and in addition, the total solution loss per step was ver… Show more

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Cited by 30 publications
(19 citation statements)
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“…These lab-scale experiments have now been scaled-up 400 times-from a 0.5 L reactor to a 200 L reactor-prior to a pre-commercial stage. Some laboratory-scale results indicated an eventual loss of NH 3 during the carbonation process [26]. Thus, it is critical to quantify the level of NH 3 loss at different carbonation temperatures and offer solutions to avoid the problem.…”
Section: Introductionmentioning
confidence: 99%
“…These lab-scale experiments have now been scaled-up 400 times-from a 0.5 L reactor to a 200 L reactor-prior to a pre-commercial stage. Some laboratory-scale results indicated an eventual loss of NH 3 during the carbonation process [26]. Thus, it is critical to quantify the level of NH 3 loss at different carbonation temperatures and offer solutions to avoid the problem.…”
Section: Introductionmentioning
confidence: 99%
“…To avoid regeneration, Eloneva et al (2009) also tested the efficacy of ammonium salts (NH 4 Cl, CH 3 COONH 4 , NH 4 NO 3 ) and found positive results with steel converter slag, but the efficiency was poorer for blast furnace and ladle slags; this was attributed to calcium being predominantly bound as silicates in these materials (as opposed to free lime (CaO) in converter slag). The loss of ammonia (NH 3 ) in the off-gas also becomes an added concern when using these additives (Eloneva et al, 2011).…”
Section: Introductionmentioning
confidence: 99%
“…Higher temperatures and lower solvent concentration can increase NH 3 release (Said et al, 2016). Moreover, ammonium salt types also affect NH 3 release (Eloneva et al, 2011). Furthermore, not all Ca be extracted from the slag, with about 70%-80% of Ca in converter slag (74-125 µm) dissolving in the ammonium nitrate solution (0.5-2 mol•L −1 ) (Mattila and Zevenhoven, 2014).…”
Section: Indirect Carbonationmentioning
confidence: 99%