Table 9 Summary of mineralogical composition of the as-received red mud and the red mud collected after experiment 3 based on XRD analysis.

From: Experimental study of CO2 sequestration and H2 generation potential through mineral carbonation in Saudi red mud

Mineral

Chemical formula

Concentration in solid (wt%)

Raw RM

Experiment 3

Hematite

Fe2O3

25.6

22.5

Cancrinite

Na6(Al6Si6O24)(CaCO3)(H2O)2

0.30

0.00

Chantalite

CaAl2SiO4(OH)4

24.2

15.4

Magnesite

MgCO3

4.70

12.6

Calcite

CaCO3

7.60

6.1

Rutile

TiO2

22.8

24.3

Gibbsite

Al(OH)3

6.30

8.6

Boehmite

Al2O3·H2O

8.40

9.6

Sodalite

Na8(Al6Si 6O24)Cl2

0.00

0.70

Anatase

TiO2

0.00

0.20

Gypsum

CaSO4·2H2O,

0.00

0.00

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