Table 15. Bimetallic and Non-Ni Based Catalysts Reported in the Literature for the Pyrolysis and In-line Steam Reforming of Plastic Wastes.

Catalyst	Feed	Preparation methodb	Reactor configuration	Operating conditionsc	H2 conc. (vol %)	H2 prod. (wt %)	Ref.
4.4Ru/Al2O3	PS	commercial (AP4002)	fixed/fixed (1 g min–1)	TP = 400–600 °C	68.2	33.0	Namioka et al.90
				TR = 580–680 °C
				S/C = 3.7 (molar)
0.5Ru/Al2O3	PP	commercial (AP4002)	fixed/fixed (1 g min–1)	TP = 400–550 °C	54.0	4.5	Park et al.43
				TR= 630 °C
				S/C = 3.6 (molar)
5Ru/Al2O3	PP	commercial (AP4002)	fixed/fixed (1 g min–1)	TP= 400–600 °C	69.8	36.5	Park et al.43
				TR= 580–680 °C
				S/C = 3.7 (molar)
20Fe/ZrO2	PS	cp	fixed/fixed (300 mg)	TP = 500 °C	81.5	2.6	Zhou et al.172
				TR= 500 °C
				steam = 0.02 mL min–1
Fe-Ni-MCM-41	SMWPsa	wi	fixed/fixed	TP = 500 °C	46.7	9.2	Zhang et al.204
				TR = 800 °C
				steam = 2 mL h–1
5Ni-15Fe/ZrO2	PS	cp	fixed/fixed (0.3 g)	TP = 500 °C	69.5	6.9	Zhou et al.172
				TR = 500 °C
				steam = 0.02 mL min–1
10Ni-10Fe/ZrO2	PS	cp	fixed/fixed (0.3 g)	TP = 500 °C	69.0	7.4	Zhou et al.172
				TR = 500 °C
				steam = 0.02 mL min–1
15Ni-5Fe/ZrO2	PS	cp	fixed/fixed (0.3 g)	TP = 500 °C	63.0	8.6	Zhou et al.172
				TR = 500 °C
				steam = 0.02 mL min–1
NiCuAl 1:1:2	PP	cp	fixed/fixed (1 g)	TP = 500 °C	61.1	18.9	Wu and Williams150
				TR = 800 °C
				steam = 4.74 g h–1
NiCuMgAl	PP	cp	fixed/fixed (1 g)	TP = 500 °C	62.2	20.4	Wu and Williams150
				TR = 800 °C
				steam = 4.74 g h–1

^aSMWPs, Simulated mixed waste plastics. (LDPE, 42 wt %; HDPE, 20 wt %; PS, 16 wt %; PET, 12 wt % PP, 10 wt %).

^biwi, Incipient wetness impregnation; wi, wet impregnation; cp, co-precipitation.

^cT_P = Pyrolysis temperature; T_R = reforming temperature.