Production from ilmenite of TiO2-supported catalysts for selective catalytic reduction of NO with NH3

Kyung Ju Lee, Muhammad Salman Maqbool, Pullur Anil Kumar, Kwang Ho Song, Heon Phil Ha

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    Economic production of titanium dioxide (yield >98 %) from ilmenite has been achieved by use of a modified sulfate reduction process. A series of samples were prepared by varying the concentration of titanium dioxide nuclei (0.2, 0.3, and 0.6 %) and further impregnation with antimony and vanadia. The structural and acidic properties of the samples were comprehensively studied by X-ray diffraction (XRD), transmission electron microscopy, BJH pore size distribution, and temperature-programmed desorption of NH3. The XRD results revealed the presence of intense peaks from anatase titanium dioxide. Enhancement of surface area was observed for second-time filtered samples, possibly because of loss of iron from the bulk. As a result, formation of additional micropores was apparent from N2 adsorption and desorption isotherms. Among all the antimony and vanadia-doped samples, the first-time filtered sample with the low concentration of nuclei (0.2 %) had the highest catalytic activity at low temperatures, owing to its larger pore size and abundant acidic species.

    Original languageEnglish
    Pages (from-to)3265-3277
    Number of pages13
    JournalResearch on Chemical Intermediates
    Volume39
    Issue number7
    DOIs
    Publication statusPublished - 2013 Sept

    Bibliographical note

    Funding Information:
    Acknowledgments We acknowledge financial support of this work by the Fundamental R&D Program for Core Technology of Materials provided by the Ministry of Knowledge Economy, Republic of Korea. We also thank Cosmo Fine Chemical Co. Ltd. for their help in conducting the experiments.

    Copyright:
    Copyright 2013 Elsevier B.V., All rights reserved.

    Keywords

    • Acidity
    • NH-SCR
    • NO conversion
    • Pore size
    • TiO

    ASJC Scopus subject areas

    • General Chemistry

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