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https://hdl.handle.net/2440/114516
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Type: | Journal article |
Title: | Facile synthesis of tube-shaped Mn-Ni-Ti solid solution and preferable Langmuir-Hinshelwood mechanism for selective catalytic reduction of NOₓ by NH₃ |
Other Titles: | Facile synthesis of tube-shaped Mn-Ni-Ti solid solution and preferable Langmuir-Hinshelwood mechanism for selective catalytic reduction of NO(x) by NH(3) |
Author: | Liu, J. Li, X. Li, R. Zhao, Q. Ke, J. Xiao, H. Wang, L. Liu, S. Tadé, M. Wang, S. |
Citation: | Applied Catalysis A: General, 2018; 549:289-301 |
Publisher: | Elsevier BV |
Issue Date: | 2018 |
ISSN: | 0926-860X 1873-3875 |
Statement of Responsibility: | Jie Liu, Xinyong Li, Ruoyun Li, Qidong Zhao, Jun Ke, Huining Xiao, Lidong Wang, Shaomin Liu, Moses Tadé, Shaobin Wang |
Abstract: | We present a tube-shaped Mn-Ni-Ti solid solution for the selective catalytic reduction of NOx with NH3 (NH3-SCR) through a facile self-templated urea-homogeneous precipitation method, which leads to the fine dispersion of the MnOx and NiOx active species in the TiO2 lattice. The ratio of Mn/Ni/Ti is an important factor to affect the crystallinity of Mn-Ni-Ti solid sulotion, and the catalyst with a Mn/Ni/Ti ratio of 2/3/5 (Mn2-Ni3) exhibits the significant structure distortion. The abundant surface defects induce more generation of Mn4+ species, surface adsorbed oxygen and Lewis acid sites, and acclerate the adsorption and activation of NO molecules. The appropriate Mn/Ni ratio inhibits the competitive adsorption of NH3 with NO, and facilitates the Langmuir-Hinshelwood (L-H) mechanism to form N2, which acts as a much more rapid pathway in comparison to the parallel one following Eley-Rideal (E-R) mechanism. The readily occurence of L-H mechanism significantly improves the SCR performance of catalyst. |
Keywords: | Mn-Ni-Ti solid solution; selective catalytic reudction; NOₓ; competive adsorption; Langmuir-Hinshelwood mechanism |
Description: | Available online 16 October 2017 |
Rights: | © 2017 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.apcata.2017.10.010 |
Grant ID: | 21507029 21501138 21590813 21577012 http://purl.org/au-research/grants/arc/DP150103026 |
Published version: | http://dx.doi.org/10.1016/j.apcata.2017.10.010 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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