Production from ilmenite of TiO2-supported catalysts for selective catalytic reduction of NO with NH3
- Authors
- Lee, Kyung Ju; Maqbool, Muhammad Salman; Kumar, Pullur Anil; Song, Kwang Ho; Ha, Heon Phil
- Issue Date
- 9월-2013
- Publisher
- SPRINGER
- Keywords
- Acidity; TiO2; NO conversion; NH3-SCR; Pore size
- Citation
- RESEARCH ON CHEMICAL INTERMEDIATES, v.39, no.7, pp.3265 - 3277
- Indexed
- SCIE
SCOPUS
- Journal Title
- RESEARCH ON CHEMICAL INTERMEDIATES
- Volume
- 39
- Number
- 7
- Start Page
- 3265
- End Page
- 3277
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/102273
- DOI
- 10.1007/s11164-012-0838-9
- ISSN
- 0922-6168
- 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 N-2 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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Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
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