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RenCat’s innovative core technology is the invention of a mixed metal oxide catalyst which can remove trace ammonia impurity in hydrogen to the level of 0.1 ppm. The competitor technology is Pd based membrane which is very expensive and has stability problems.
For generating fuel cell grade hydrogen from ammonia, first it is converted to H2 through a reaction called cracking. The cracking reaction because of thermodynamic reasons, leaves a trace amount of ammonia unconverted. Because ammonia even in trace amounts is a poison for PEMFC, a purification step is needed after the cracking step.
Till now, an expensive and unreliable Pd-membrane based technology has been the way to clean the trace ammonia from the cracked product making H2 generation from ammonia unfeasible.