Studies on B sites in Fe-doped LaNiO3 perovskite for SCR of NOx with H2 |
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| Authors: | Yongjin Luo Xiuyun Wang Qingrong Qian Qinghua Chen |
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| Affiliation: | 1. College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China;2. Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou 350007, China;3. National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, 350002 Fuzhou, PR China |
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| Abstract: | A series of LaNi1−xFexO3 (x = 0.0, 0.2, 0.4, 0.7, and 1.0) perovskites were synthesized and characterized by X-ray diffraction (XRD), N2 physisorption, scanning electron microscopy (SEM), H2-temperature-programmed reduction (H2-TPR), and X-ray photoelectron spectroscopy (XPS). The perovskites were investigated for selective catalytic reduction of NOx by hydrogen (H2-SCR). It is shown that Fe addition into LaNiO3 leads to a promoted efficiency of NOx removal, as well as a high stability of perovskite structure. Moreover, easy reduction of Ni3+ to Ni2+ with the aid of appropriate Fe component mainly accounts for the enhanced activity. Meanwhile, deactivation of the sulfated catalysts is due to that sulfates mainly deposit on active Ni component while doping of Fe can protect Ni to some extent at the expense of partial sulfation. |
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| Keywords: | LaNi1&minus xFexO3 H2-SCR Sulfur poisoning and regeneration Redox properties Functional sites |
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