J Nanosci Nanotechnol. 2016 Jan;16(1):878-84. doi: 10.1166/jnn.2016.10666.

Cu-Cr-O Functionalized ETS-2 Nanoparticles for Hot Gas Desulfurization.

Journal of nanoscience and nanotechnology

Farzad Yazdanbakhsh, Molen Alizadehgiashi, Marc Bläsing, Michael Müller, James A Sawada, Steven M Kuznicki

PMID: 27398540 DOI: 10.1166/jnn.2016.10666

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.

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't