. 2023 Jul 16;37(15):10775–10798. doi: 10.1021/acs.energyfuels.3c00760

Table 3. Comparison between NH₃ Conversion and H₂ Recovery Achieved with a Conventional Reactor (CR) and with a Membrane Reactor (MR) for Ammonia Decomposition in the Works of Zhang et al.,¹⁷ Itoh et al.,^79,80 Cechetto et al,.⁶⁵ and Zhang et al.²⁷.

Author(s) [ref]	Permeate pressure [bar]	Permeate pressure [bar]	NH₃ flow rate [mL_N/min]	Catalyst	Temperature [°C]	Equilibrium conversion [%]	NH₃ conversion conventional reactor [%]	NH₃ conversion membrane reactor [%]	Percentage increase in NH₃ conversion	H₂ recovery [%]
Zhang et al.¹⁷	5	1	20–100	1) Ru (Ru impregnated in the membrane support) (0.41 wt % Ru loading)	350	91.9	8	26	+225%	N/A
					400	95.9	31	93	+200%	N/A
					450	97.8	61^a	∼100^a	+64%	N/A
				2) Cs/Ru (Ru impregnated in the membrane support and Cs impregnated in the Pd layer)(Cs/Ru molar ratio = 1.5)	350	91.9	8	86	+975%	87
					400	95.9	31	99^a	+219%	95
					450	97.8	61^a	∼100^a	+64%	93

Zhang et al.²⁷	5	1	200	(Ni/Al = 1.20, La/Ni = 0.22) Ni/La-Al₂O₃, 6 g	425	97.0	42^a	55^a	+30%	N/A
					450	97.8	64^a	91^a	+42%	N/A
					475	98.3	83^a	98^a	+18%	N/A
					500	98.7	94^a	98^a	+5%	N/A

Cechetto et al.⁶⁵	4	1) 1	500	(2 wt %) Ru/Al₂O₃, 250 g	400	96.7	65.4	72.2	+10%	94
					425	97.6	86.2	98.0	+14%	97
					450	98.2	96.8	99.5	+3%	97
		2) 0.01			400	96.7	65.4	99.3	+52%	52
					425	97.6	86.2	99.6	+16%	80
					450	98.2	96.8	99.8	+3%	85

Itoh et al.⁷⁹	1	0.01	8.5–10	(5 wt %) Ru/SiO₂, 0.5 g	350	98.2	13^a	15^a	+20%	10
					400	99.1	39^a	48^a	+21%	31
					450	99.7	73^a	87^a	+19%	59

Itoh et al.⁸⁰	1	0.06	10	(2 wt %) Ru/Al₂O₃, 0.88 g	325	97.3	9^a	10^a	+13%	N/A
					350	98.2	20^a	25^a	+27%	N/A
					375	98.7	37^a	51^a	+40%	N/A
					400	99.1	60^a	76^a	+26%	N/A

Data not directly reported in the publication and retrieved from graphic representation of experimental results.

Table 3. Comparison between NH3 Conversion and H2 Recovery Achieved with a Conventional Reactor (CR) and with a Membrane Reactor (MR) for Ammonia Decomposition in the Works of Zhang et al.,17 Itoh et al.,79,80 Cechetto et al,.65 and Zhang et al.27.