High performance of catalytic sheet filters of V 2 O 5 -WO 3 /TiO 2 for NO x reduction
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PROCESSES FOR WATER ENERGY AND ENVIRONMENT PLATFORMS
High performance of catalytic sheet filters of V2O5-WO3/TiO2 for NOx reduction Ajit Dattatray Phule 1 & Joo Hong Choi 1 & Jin Hyoung Kim 2 Received: 28 January 2020 / Accepted: 17 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Nitrogen oxide (NOx) emissions in fuel from the stationary as well as from mobile sources primarily from power stations, industrial heaters, cogeneration plants, and diesel engines represent a major worldwide environmental problem. The selective catalytic reduction (SCR) of NOx with NH3 over catalyst based on V2O5-WO3/TiO2 (VWT) is the most effective benchmark technique to efficiently reduce NOx emissions from stationary and mobile sources. Among the different transition metals (Mn, Nb, Co, Cr, Cu, Ce) used in current research work, the manganese could make up the loss of SCR activity caused by the decrease of V2O5 loading (50%) in prepared VWT powder catalyst. The optimal loading of Mn is 3 wt% in case of 3V9WT powder catalyst, which shows the best catalytic performance. 3Mn3V9WT powder catalyst exhibits enhanced NO conversion performance, i.e., ~ 95–98% with NH3 leakage < 20 ppm, for the temperature window of 260–320 °C in comparison with all other metal-doped 3V9WT catalyst powder. Manganese is the best substitute (50%) to vanadium in VWT catalyst without compromising the NO conversion performance even in presence of SO2 (1000 ppm), i.e., > 94% for the temperature of 300–320 °C. The recovery of SCR activity of the 3Mn3V9WT catalyst after SO2 effect was good, i.e., ~ 94% at 320 °C for long interval of time, where NH3 leakage was < 5 ppm. Keywords V2O5-WO3/TiO2 catalyst . Manganese . SCR of NOx . Air pollution control . SO2 . Transition metals
Introduction Nitrogen oxides (NOx), as crucial precursor pollutants inducing the formation of acid rain, photochemical smog, global warming, and haze, are mainly emitted from industrial power plants and mobile diesel vehicle sources, which causes great harm to the environment and mankind (Forzatti 2001; Topsoe 1994; Zhu et al. 2017). Selective catalytic reduction (SCR) of NOx with NH3 is one of the most adopted techniques for the removal of NOx from stationary and mobile sources (Forzatti et al. 2009). In recent decades, a variety of NH3-SCR catalysts have been developed, such as transition metal supported on Responsible editor: Sami Rtimi * Joo Hong Choi [email protected] 1
Department of Chemical Engineering/ERI, Gyeongsang National University, Jinju 52828, Korea
2
Kyungsung Industry Co., LTD, Noksansandan 382 Ro 14 Bungil 41, Busan, Kangsu Gu, Korea
zeolites, e.g., Fe-Cu-ZSM-5 (Zhang et al. 2014), Cu-ssz-13 (Fickel et al. 2011), Cu-SAPO-34 (Martinez-Franco et al. 2012), and transition metal oxide catalyst, e.g., Fe-based (Liu et al. 2008; Yang et al. 2012), Cu-based (Si et al. 2010; Liu et al. 2014), and Mn-based (Song et al. 2015; Putluru et al. 2015). These catalysts have shown excellent catalytic activity. However, their catalytic activity decreases due t
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