Table 5.

Dry reforming reactions reported in literature using metals (other than nickel) at different temperatures (T), gaz hourly space velocity (GHSV), with different pressures (P), and reported Time On Stream (TOS).

Catalyst	Conditions	CH4/CO2 conversion H2/CO ratio TOS	References
CeO2	T = 900°C	32%/nd	Laosiripojana and Assabumrungrat, 2005
	GHSV = 4	0.93
	[O] = CO2	10 h
	P = 1 atm
Mo2C	T = 947°C	90%/93%	Brungs et al., 2000
SiO2, Al2O3, TiO2, ZrO2	GHSV = 2.6	0.95
	[O] = CO2	40 h
	P = 7.9 atm
Ru	T = 750°C	57%/nd	Ferreira-Aparicio et al., 2000
SiO2, Al2O3	GHSV = 120	nd
	[O] = CO2	10 min
	P = nd
VC, NbC, TaC	T = 1050°C	90%/90%	Brungs et al., 1999
	GHSV = 1.2	0.96
	[O] = CO2	25 h
	P = 7.9 atm
Ru, Rh, Pt	T = 850°C	95%/nd	Tsyganok et al., 2004
Mg(Al)OX	GHSV = 227	1.8
	[O] = CO2 and O2	5 h
	P = 1 atm
Co	T = 800°C	95% + /95% +	Bouarab et al., 2004
MgO-SiO2	GHSV = 13	1.12
	[O] = CO2	13 h
	P = 1 atm
CoNdOx	T = 850°C	92%/92%	Choudhary et al., 2005
	GHSV = 20	0.91
	[O] = CO2	60 h
	P = 1 atm
Ir/Ce0.9Gd0.1O2−x	T = 800°C	65%/85%	Wisniewski et al., 2005
	GHSV = 30	0.9
	[O] = CO2	20
	P = 1 atm
Pt	T = 700°C	80%/80%	Özkara-Aydınoğlu et al., 2009
ZrO2	GHSV = 15.6	1
Ce (promoter)	[O] = CO2	4
	P = 1 atm

^*GHSV, Gas hourly space velocity expressed in l/g_cat^*h.