Table 11. Summary of Literature Available on Experimental Studies on Membrane Reactors for Decomposition of Ammonia Available in Diluted Streams or Sweep Gas.

	Membrane				Reactor operating conditions
Author(s) [ref]	Configuration	Selective layer composition	Selective layer thickness [μm]	Length [mm]	Temperature [°C]	Reaction pressure [bar]	Permeate pressure [bar]	Feed [mLN/min]	Feed composition [mol %]	Sweep gas flow rate [mL/min]	Catalyst type	Highest NH3 conversion [%]	Hydrogen recovery [%]
Li et al.25	Silica membrane on bimodal catalytic support (Ru/γ-Al2O3/α-Al2O3)	SiO2	<0.0003	N/A	450	1	1	10	100 (NH3)	100 (N2)	Ru	94.3	93a
Li et al.88	Silica membrane on bimodal catalytic support (Ru/γ-Al2O3/α-Al2O3)	SiO2	<0.0003	N/A	390–470	1	1	10–50	100 (NH3)	10–100 (N2)	Ru	96a	91a
Collins et al.94	Supported composite Pd-ceramic membranes	Pd	11.4	55	450–600a	16.18	1	435	48 (N2)	N/A	Ni/Al2O3	>94	N/A
									20 (H2)
									31.665 (He)
									0.335 (NH3)
García-García et al.95	Pd/porous stainless steel composite membrane	Pd	40	N/A	333–592a	1	1	100	90 (He)	100–300 (He)	Carbon supported Ru-based catalyst promoted with sodium (2 wt % Ru)	100	N/A
									10 (NH3)
Cheng et al.101	Dual layer NMW/NMW-Ni hollow fiber membrane	Nd5.5Mo0.5W0.5O11.25-δ (NMW)	26	N/A	600–750	1	1	50	60–80 mol % He	50 mL/min N2	NMW-NiO catalytic support of the membrane (0.11 g)	99	N/A
									20–40 mol % NH3

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