Pt-Co and Pt-Ni Catalysts of Low Metal Content for H₂ Production by Reforming of Oxygenated Hydrocarbons and Comparison with Reported Pt-Based Catalysts

Table 3

Stability of the catalysts in APR of aqueous ethylene glycol (10%w).

Catalyst	MetalT]t (%)		10^4 × rdl (metal/cat·h)	CokeT]t (%)		10^4 × rdf (coke/cat·h)
	0 h	10 h		3 h	10 h
Pt-IWI	0.98	0.97	0.1	1.3	1.9	8.6
Pt-UMC	0.99	0.98	0.1	0.9	1.2	4.3
PtCo-IWI	4.07	4.01	0.6	1.2	1.4	2.8
PtCo-UMC	3.84	3.82	0.2	1.1	1.2	1.4
PtNi-IWI	4.11	4.03	0.8	2.8	3.6	11.4
PtNi-UMC	3.95	3.90	0.5	2.8	3.4	8.6
NiCo-IWI	6.00	5.92	0.8	2.4	3.4	14.3
NiCo-UMC	5.86	5.83	0.3	2.5	2.7	2.9

Reaction conditions: 498 K, 22 bar, WHSV = 2.34 h⁻¹, LHSV = 0.86 h⁻¹, and TOS = 10 (h); Metal_T]_t: total metal content on coke-free catalyst at (t) hour on-stream; Coke_T]_t: coke deposited on the catalyst at (t) hour on-stream; r_dl: leaching deactivation rate; r_df: fouling deactivation rate.