Efficient Direct Decomposition of NO over La0.8A0.2NiO3 (A=K, Ba, Y) Catalysts under Microwave Irradiation

La 0.8 A 0.2 NiO 3 (A=K, Ba, Y) catalysts supported on the microwave-absorbing ceramic heating carrier were prepared by the sol-gel method. The crystalline phase and the catalytic activity of the La 0.8 A 0.2 NiO 3 catalysts were characterized by XRD and H 2 temperature-programmed reduction (TPR). T...

Full description

Saved in:
Bibliographic Details
Published inJournal of Wuhan University of Technology. Materials science edition Vol. 39; no. 1; pp. 17 - 23
Main Authors Wang, Hao, Zhao, Zijian, Duan, Xinghui, Zhou, Shijia
Format Journal Article
LanguageEnglish
Published Wuhan Wuhan University of Technology 01.02.2024
Springer Nature B.V
Subjects
Advanced Materials
Catalysts
Catalytic activity
Chemical synthesis
Chemistry and Materials Science
Decomposition
Flow velocity
Gas flow
Irradiation
Materials Science
Microwave absorption
Nitric oxide
Oxygen
Perovskite structure
Perovskites
Sol-gel processes
microwave-absorbing heating ceramics
microwave catalysis
direct decomposition of NO
perovskite catalystL
Online AccessGet full text

Cover

More Information
Summary:La 0.8 A 0.2 NiO 3 (A=K, Ba, Y) catalysts supported on the microwave-absorbing ceramic heating carrier were prepared by the sol-gel method. The crystalline phase and the catalytic activity of the La 0.8 A 0.2 NiO 3 catalysts were characterized by XRD and H 2 temperature-programmed reduction (TPR). The effects of reaction temperature, oxygen concentration, and gas flow rate on the direct decomposition of nitric oxide over the synthesized catalysts were studied under microwave irradiation (2.45 GHz). The XRD results indicated that the La 0.8 A 0.2 NiO 3 catalysts formed an ABO 3 perovskite structure, and the H 2 -TPR results revealed that the relative reducibility of the catalysts increased in the order of La 0.8 K 0.2 NiO 3 > La 0.8 Ba 0.2 NiO 3 > La 0.8 Y 0.2 NiO 3 . Under microwave irradiation, the highest NO conversion amounted to 98.9%, which was obtained with the La 0.8 K 0.2 NiO 3 catalyst at 400 °C. The oxygen concentration did not inhibit the NO decomposition on the La 0.8 A 0.2 NiO 3 catalysts, thus the N 2 selectivity exceeded 99.8% under excess oxygen at 550 °C. The NO conversion of the La 0.8 A 0.2 NiO 3 catalysts decreased linearly with the increase in the gas flow rate.
ISSN:1000-2413
1993-0437
DOI:10.1007/s11595-024-2849-y