Impacts of Nickel Nanoparticles on Mineral Carbonation
Table 3
Mineral composition of CaO and MgO after fifteen-minute and one-hour carbonation experiments (S/L = 50 g/L), under mechanical mixing, with/without NiNP addition, determined by QXRD (wt% of crystalline total).
Mineral name
Chemical formula
CaO
MgO
No NiNP
+NiNP
No NiNP
+NiNP
0.25/1 h
0.25/1 h
0.25/1 h
0.25/1 h
Aragonite
CaCO3
0.8/12.8
0.5/8.0
nd
nd
Brucite
Mg(OH)2
nd
nd
38.2/2.0
36.1/0.8
Calcite
CaCO3
46.7/78.2
51.7/81.6
nd
nd
Hydromagnesite1
Mg5(CO3)4(OH)2·4(H2O)
nd
nd
58.5/95.7
60.6/96.1
Lime
CaO
1.6/0.4
1.4/0.3
nd
nd
Magnesite
MgCO3
nd
nd
nd/1.5
0.1/0.9
Monohydrocalcite
CaCO3·(H2O)
2.6/0.2
1.5/1.2
nd
nd
Nesquehonite
Mg(HCO3)(OH)·2(H2O)
nd
nd
0.1/nd
0.2/2.2
Periclase
MgO
nd
nd
3.2/0.8
3.1/0.1
Portlandite
Ca(OH)2
46.0/7.9
41.1/8.0
nd
nd
Vaterite
CaCO3
2.4/0.5
3.7/0.9
nd
nd
nd: not detected (<0.1 wt%).
1sum of mono- and ortho-hydromagnesite.
