Tea Garden Lateritic Soil as a High-Temperature Desulfurization Sorbent: Effect of Oxygen on Regeneration Process

Table 2

Spectroscopic and surface area analyses of the lateritic soil under different regenerating operations.

	Fresh soil	Air regeneration	1% O2 regeneration
BET surface area	31.4 m^2g^−1	25.5 m^2g^−1	26.3 m^2g^−1
^29Si NMR	Q^4: 0%	Q^4: 18.3%	Q^4: 14.6%
	Q^3: 87.6%	Q^3: 81.7%	Q^3: 85.4%
^27Al NMR	Al^6: 82.4%	Al^6: 75.8%	Al^6: 78.3%
	Al^4: 17.6%	Al^4: 24.2%	Al^4: 21.7%
XRD	SiO2	SiO2	SiO2
	α-Fe2O3 (2θ = 33.2)	α-Fe2O3 (2θ = 33.2)	α-Fe2O3 (2θ = 33.2)
XPS	Fe2p (711 eV)	Fe2p (711.3 eV)	Fe2p (711.2 eV)
			S2p (168.6 eV)