Reactors for the decomposition of nh3 at high temperatures

A plant for production of H2 by catalytic decomposition of NH3 to N2 and H2, comprising:

• a reactor containing an NH3 decomposition catalyst;
• and
• at least one component formed at least partly from a metal alloy;
• wherein the metal alloy comes into direct contact with the NH3 and/or N2 at least in one region of its surface in the course of operation of the reactor;
• wherein the metal alloy contains nickel and chromium with a total nickel and chromium content of at least 15% by weight, based on the total weight of the metal alloy.