Table 6. Ni/Al₂O₃ Catalysts Reported in the Literature for the Pyrolysis and In-line Steam Reforming of Biomass and Plastic Mixtures.

Catalyst	Feed	Preparation methoda	Reactor configuration	Operating conditionsb	H2 conc. (vol %)	H2 prod. (wt %)	Ref.
11Ni/Al2O3	pine wood sawdust HDPE 0, 25, 50, 75, 100	commercial (G90 LDP)	spouted bed/fluidized (0.75 g min–1)	TP = 500 °C	71.1	24.6	Arregi et al.57
				TR = 700 °C
				S/(B + P) = 4
10Ni/Al2O3	rice husk (RH) PE 0, 25, 50, 75, 100	wi	fixed/fixed (1 g)	TP = 600 °C	46.0	4.4	Xu et al.148
				TR = 800 °C
				steam = 2 mL h–1
10Ni/Al2O3	pine wood sawdust PP B/P = 80/20	wi	fixed/fixed (2 g)	TP = 600 °C	52.1	5.5	Alvarez et al.147
				TR = 800 °C
				Steam = 4.74 mL h–1
10Ni/Al2O3	pine wood sawdust HDPE B/P = 80/20	wi	fixed/fixed (2 g)	TP = 600 °C	52.2	5.1	Alvarez et al.147
				TR = 800 °C
				steam = 4.74 mL h–1
10Ni/Al2O3	pine wood sawdust PS B/P = 80/20	wi	fixed/fixed (2 g)	TP = 600 °C	49.2	4.0	Alvarez et al.147
				TR = 800 °C
				steam = 4.74 mL h–1
10Ni/Al2O3	pine wood sawdust real plastics (RP) B/P = 80/20	wi	fixed/fixed (2 g)	TP = 600 °C	51.3	4.4	Alvarez et al.147
				TR = 800 °C
				steam = 4.74 mL h–1
10Ni/Al2O3	HDPE-pine sawdust (5:5)	cp	fixed/fixed (0.5 g)	TP = 800 °C	59.8	6.4	Chai et al.166
				TR = 700 °C
				steam = 5 mL h–1
10Ni/Al2O3	PP-pine sawdust (5:5)	cp	fixed/fixed (0.5 g)	TP = 800 °C	61.8	5.0	Chai et al.166
				TR = 700 °C
				steam = 5 mL h–1
10Ni/Al2O3	PS-pine sawdust (5:5)	cp	fixed/fixed (0.5 g)	TP = 800 °C	60.4	4.9	Chai et al.166
				TR = 700 °C
				steam = 5 mL h–1

^awi, Wetness impregnation; cp, co-precipitation.

^bT_P, Pyrolysis temperature; T_R, reforming temperature.