title: Cu-Cr-O Functionalized ETS-2 Nanoparticles for Hot Gas Desulfurization.
abstract: Engelhard Titanium Silicate-2 (ETS-2), a sodium nanotitanate, was surface functionalized by ion exchanging the solid with copper and chromium ions. The ability of this bi-metallic adsorbent to remove H2S at elevated temperatures was assessed using a dynamic breakthrough system and contrasted against an analogous mixed metal oxide, Cu-Cr-O. Unlike Cu-Cr-O, the H2S capacity for Cu-Cr-ETS-2 remains unchanged from 350 °C up to 950 °C. Using ETS-2 as a support for the metals increased the adsorbents surface area and improved its sulfur capacity from 35 mg H₂S/g for Cu-Cr-O to 61 mg H₂S/g adsorbent for CuCr-ETS-2. The consistent presence of Cu₉S₅ on the sulfided adsorbents suggests that chromium effectively stabilizes the copper against reduction to metallic copper up to temperatures as high as 950 °C.
authors.forename: Farzad
authors.initials: F
authors.lastname: Yazdanbakhsh
authors.forename: Molen
authors.initials: M
authors.lastname: Alizadehgiashi
authors.forename: Marc
authors.initials: M
authors.lastname: Bläsing
authors.forename: Michael
authors.initials: M
authors.lastname: Müller
authors.forename: James A
authors.initials: JA
authors.lastname: Sawada
authors.forename: Steven M
authors.initials: SM
authors.lastname: Kuznicki