Lee, Kyung Ju Maqbool, Muhammad Salman Kumar, Pullur Anil Song, Kwang Ho Ha, Heon Phil 2024-01-20T11:33:22Z 2024-01-20T11:33:22Z 2021-09-05 2013-09 0922-6168 https://pubs.kist.re.kr/handle/201004/127701 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. English SPRINGER LOW-TEMPERATURE MODIFIED MNOX/TIO2 SCR Production from ilmenite of TiO2-supported catalysts for selective catalytic reduction of NO with NH3 Article 10.1007/s11164-012-0838-9 1 RESEARCH ON CHEMICAL INTERMEDIATES, v.39, no.7, pp.3265 - 3277 RESEARCH ON CHEMICAL INTERMEDIATES 39 7 3265 3277 scie scopus 000323507300035 2-s2.0-84883203320 Chemistry, Multidisciplinary Chemistry Article LOW-TEMPERATURE MODIFIED MNOX/TIO2 SCR TiO2 NO conversion NH3-SCR Pore size Acidity