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

doi:10.1007/s11164-012-0838-9

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

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	3265-3277
Number of pages	13
Journal	Research on Chemical Intermediates
Volume	39
Issue number	7
DOIs	https://doi.org/10.1007/s11164-012-0838-9
Publication status	Published - 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

Access to Document

10.1007/s11164-012-0838-9

Cite this

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title = "Production from ilmenite of TiO2-supported catalysts for selective catalytic reduction of NO with NH3",

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.",

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author = "Lee, {Kyung Ju} and Maqbool, {Muhammad Salman} and Kumar, {Pullur Anil} and Song, {Kwang Ho} and Ha, {Heon Phil}",

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.",

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AU - Song, Kwang Ho

AU - Ha, Heon Phil

N1 - 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.

PY - 2013/9

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