2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 3. Fehrmann Intl. Symp. / Molten Salt and Ionic Liquid
| Editors: | F. Kongoli, M. Haumann, P. Wasserscheid, T. Welton, M. Gaune-Escard, A. Angell, A. Riisager |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2018 |
| Pages: | 154 pages |
| ISBN: | 978-1-987820-86-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Oxidation of NO to NO<sub>2</sub> by SILP materials promoted by trace alcohol
David Nielsen1; Alexander W. Liljegren1; Susanne Mossin1; Rasmus Fehrmann1;1DTU CHEMISTRY, Lyngby, Denmark;
Type of Paper: Regular
Id Paper: 249
Topic: 13
Abstract:
Nitrogen oxides (NO<sub>x</sub>) are formed in combustion processes and are known to cause acid rain and to promote the formation of smog [1]. NO<sub>x</sub> emissions are under increasing legislative control, and improved technologies for preventing NO<sub>x</sub> emissions are needed. In particular, the areas of biomass fired boilers and mobile sources of NO<sub>x</sub> emission have proven challenging for the traditional vanadia-based catalyst, and low-temperature DeNOx technologies are attractive.
Selective Catalytic Reduction of NO<sub>x</sub> by NH<sub>3</sub> (SCR) can be utilized to minimize the emission of NO<sub>x</sub>. The catalysts used for SCR are mainly vanadia, copper, or iron based. The formation of N<sub>2</sub> and H<sub>2</sub>O can be obtained at a much higher rate, when NO<sub>2</sub> is present during the SCR process [2]. This is known as fast SCR and can be an important step in implementing more efficient SCR technologies, including low-temperature processes for tail-end application. During the investigation of Supported Ionic Liquid Phase (SILP) based catalysts to oxidize NO, it was discovered that the addition of alcohol could promote the NO oxidation to NO<sub>2</sub> [3]. A silica-based 1-butyl-3-methylimidazolium nitrate, [BMIM][NO<sub>3</sub>], SILP material was prepared and tested under various conditions, including various temperatures (0-120°C), varying NO concentration and the addition of methanol. Preliminary results show significant conversion of NO to NO<sub>2</sub> can be obtained in continuous flow at ambient temperatures and high water content. The dependence on setup and optimum flow conditions are currently being investigated.
Keywords:
Environment; Ion;References:
[1] R. K. Srivastava, W. Jozewicz, C. Singer, Environ. Prog. 20, (2001), 219-228.[2] A. Kato, S. Matsuda, T. Kamo, F. Nakajima, H. Kuroda, T. Narita, J. Phys. Chem. 85 (1981) 4099.
[3] A.J. Kunov-Kruse, P.L. Thomassen, A. Riisager, S. Mossin, R. Fehrmann. Chem. Eur. J. 22, (2016), 11745.