Effect of Formic Acid Treatment on the Structure and Catalytic Activity of Co 3 O 4 for N 2 O Decomposition
- PDF / 2,296,501 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 72 Downloads / 160 Views
Effect of Formic Acid Treatment on the Structure and Catalytic Activity of Co3O4 for N2O Decomposition Yongzhao Wang1 · Xuhui Wei1,2 · Xiaobo Hu1,2 · Wei Zhou1,2 · Yongxiang Zhao1 Received: 5 August 2018 / Accepted: 30 December 2018 © Springer Science+Business Media, LLC, part of Springer Nature 2019
Abstract Co3O4 catalyst was prepared by means of precipitation method and its precursor was treated with formic acid to prepare H-Co3O4 catalyst. Their catalytic activities for N2O catalytic decomposition were studied. The results show that H-Co3O4 catalyst exhibits much higher catalytic activity than Co3O4, which may result from the larger BET surface area, especially the more amount of surface Co3+, enhanced reducibility and promoted desorption ability of oxygen species. Graphical Abstract
Keywords Co3O4 · N2O catalytic decomposition · Formic acid treatment · Precipitation method
1 Introduction
* Yongzhao Wang [email protected] * Yongxiang Zhao [email protected] 1
Engineering Research Center of Ministry of Education for Fine Chemicals, Taiyuan, China
School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
2
Nitrous oxide ( N2O) is one of the most harmful greenhouse gases, and its global warming potential (GWP) is approximately 300 times higher than that of C O2 [1]. Concurrently, N2O has long lifetime of about 150 years in the atmosphere, causing persistent stratospheric ozone depletion [2, 3]. Industry (e.g., nitric acid and adipic acid production process), energy, and transportation (combustion of fossil fuel) should be the most important sources for N2O emissions [4, 5]. Now, the concentration of N2O in the atmosphere is still rapidly rising.
13
Vol.:(0123456789)
Taking into account these serious threats of N 2O, diverse methods are being investigated to curb the increasing concentration of N 2O. Among various methods, the direct catalytic decomposition has drawn much attention due to its simpler facilities and less energy consumption [6, 7]. Up to now, different types of catalysts, such as noble metals [8, 9], metal oxides [10–12] and ion-exchanged zeolites [13, 14], have been reported for the catalytic decomposition of N 2O. Although noble-metal catalysts exhibit excellent catalytic performance, their sensitivity to higher temperature and high cost have limited the application. The ion-exchanged zeolites catalysts also have many restrictions as they can be largely deactivated in the presence of water vapor due to the collapse of the structure [13]. In contrast, metal oxides are of great potential for the industrial decomposition of N2O due to the superior catalytic activity, excellent thermal stability and economically favorable price. Konsolakis et al. [15] reviewed various metal oxides catalysts for N 2O decomposition in detail. C o3O4 was considered as one of the most active catalysts among the various metal oxides owing to the relatively high redox properties. In order to further improve the catalytic performance of single metal oxide
Data Loading...
