Enhancing the Precipitant and Calcination Process of Manganese-Iron Oxide Catalyst for Low-Temperature NH3-SCR

Author:

Pei Zhenzhao1ORCID,Fu Zhuyue1,Zhao Yi2,Liu Yan3,Zhao Haiyang1,Xu Jiaqi1,Ni Haoran1,He Chengye1,Guo Tao1,Han Siqi1

Affiliation:

1. College of Materials Science and Engineering, Hebei University of Engineering, Handan 056000, Hebei, P. R. China

2. Hebei Weida Lanhai Environmental Production Technology, Co. LTD, Handan 056000, Hebei, P. R. China

3. College of Chemical Engineering and Materials, Handan University, Handan 056000, Hebei, P. R. China

Abstract

Catalysts containing manganese as the primary active component have emerged as promising candidates for ultra-low temperature NH3-SCR applications. To enhance the catalytic activity of these catalysts, a series of Mn-FeOX catalysts were prepared using the co-precipitation method. This study focuses on investigating the appropriate calcination process for catalyst preparation using different precipitants, namely NaOH, NH3-H2O and Na2CO3. The results revealed that catalysts prepared with Na2CO3 as the preferred precipitant and calcined at 330∘C exhibited exceptional NOx removal efficiency, exceeding 90% at a temperature of 60∘C and GHSV [Formula: see text] 30,000[Formula: see text]h[Formula: see text], which demonstrated this catalyst’s remarkable low-temperature reduction capability. Detailed characterization demonstrated that the MnOX catalysts synthesized through this process possessed an amorphous structure, superior pore structure and the highest Fe[Formula: see text] content. These findings offer valuable insights for optimizing the preparation conditions of Mn-FeOX catalysts in ultra-low temperature denitrification applications.

Funder

Hebei Weida Lanhai Environmental Production Technology Co. LTD

Publisher

World Scientific Pub Co Pte Ltd

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