Interaction of hydrogen sulfide with Zr 0.92Y 0.08O 2− δ/40% Ni cermet

Abstract

The interaction of hydrogen sulfide with a cermet composed of zirconium oxide and yttrium oxide doped with metallic nickel (Ni) in the stoichiometric form Zr 0.92Y 0.08O 2− δ /40 vol% Ni and a pure nickel metal was studied at 500 and 650 °C utilizing high temperature X-ray photoelectron spectroscopy and high-temperature scanning electron microscopy. The hydrogen sulfide (H 2S) did not appear to interact with the cermet at 500 °C with H 2S exposures of 6 × 10 −5 Torr for 1 h, but interaction of H 2S with the cermet was observed at 650 °C at similar H 2S exposures. The amount and the rate of reaction of H 2S were significantly lower with the cermet than with the pure nickel metal at 650 °C with similar H 2S exposures. The dispersion of nickel in the zirconium and yttrium oxide matrix decreased the reaction of H 2S with nickel in the cermet.