Ferrimagnetic ceramic adsorbents for cleanup of H2S from exhaust gases--颗粒学报PARTICUOLOGY

Halbedel, B., & Kontogeorgakos, A. (2007). Ferrimagnetic ceramic adsorbents for cleanup of H2S from exhaust gases. China Particuology, 5(1), 156–161. https://doi.org/10.1016/j.cpart.2007.01.002

Ferrimagnetic ceramic adsorbents for cleanup of H₂S from exhaust gases

Bernd Halbedel ^a *, Apostolos Kontogeorgakos ^b

a Institute of Materials Science, Glass and Ceramic Technology Group, Technische Universität Ilmenau, P.O. Box 10 05 65, D-98684 Ilmenau, Germany
b NCSR “Demokritos”, Institute of Materials Science, 15310 Aghia Paraskevi Attiki, Greece

10.1016/j.cpart.2007.01.002

Volume 5, Issues 1–2, February–April 2007, Pages 156-161

Received 24 September 2006, Accepted 12 January 2007, Available online 6 June 2007.

E-mail: bernd.halbedel@tu-ilmenau.de

Highlights

Abstract

Adsorbents that exhibit magnetic properties in addition to other required process-relevant characteristics open up new perspectives for the dry reduction and/or elimination of H₂S and other sulfur compounds from exhaust gases. These adsorbents eliminate the sulfur compounds from exhaust gases by virtue of their coatings and their magnetic property which makes it possible the use of magnetically assisted and stabilized fluidization in an externally applied magnetic field.

In the present paper, the feasibility of the sorptive function of porous ceramic ferrimagnetic beads is ensured by sol–gel coating of zinc oxide without the formation of Zn–Fe-oxides and without considerable decrease of available pore volume. The results of material characterization by SEM, Auger electron spectroscopy, X-ray and mercury-porosity measurements and the loading capacity of a H₂S/N₂ model gas are presented and discussed. The resulting H2S loading of the functionalized adsorbent beads is more than 10 times larger than that of the starting material.

Graphical abstract

Keywords

Adsorption; Adsorbents; Ferrites; Magnetic materials; Magnetic properties; Sol–gel; Zinc oxide

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