Steam Reforming of Glycerol for Hydrogen Production over Ni/SiO₂ Catalyst

Table 1

Physical characteristics of Ni/SiO₂ catalysts.

Catalyst - (size-mm)	No. of hours/cycles	Ni crystallite size (nm) form XRD	Surface composition from EDAX		Carbon (%) from CHNS analysis	BET surface area (m^2/g)
			Ni %	C %
NS - (2 × 2)	⋯	5.0	57	⋯	⋯	260
NS1 - (2 × 2)	68 h	5.7	6.3	77	60	107
NS2 - (2 × 4)	20 h	6.8	40	25	25	150
NS3 - (3 × 5)	100 h	7.8	25	20	20	125
NS4 - (3 × 5)	20 cy	12.5	28	35	30	145
NS5 - (3 × 5)	20 cy*	20.1	37.6	12	15	…

Number of hours of the run = h; number of cycles operated = cy.
GWMRs: 1 : 9 *GWMRs: 1 : 18.
NS (2×2) = Ni/SiO₂ (fresh catalyst); NS1, NS2, NS3, NS4, and NS5 = Ni/SiO₂ (used catalysts).