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Fe–Ce Mixed Oxides Supported on Carbon Nanotubes for Simultaneous Removal of NO and Hg0 in Flue Gas
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-02-23 00:00:00 , DOI: 10.1021/acs.iecr.8b00015
Yaguang Ma 1 , Dingyuan Zhang 1 , Huamin Sun 1 , Jiafeng Wu 1 , Peng Liang 1 , Huawei Zhang 1
Affiliation  

Developing simultaneous removal technology of NOx and Hg0 in flue gas is highly desirable but remains challenging. Multiwalled carbon nanotube supported Fe–Ce mixed oxide nanoparticles (Fe(2)Ce(0.5)Ox/MWCNTs) were prepared using the ethanol impregnation method for DeNOx and Hg0 removal. The NO and Hg0 removal efficiencies over catalyst reached to 99.1% and 88.9% at 240 °C and a space velocity of 30 000 h–1. The Fe–Ce mixed oxides supported both inside and outside of MWCNTs in highly dispersed form with particle size of 3–5 nm. The Ce4+ existed on MWCNTs in two forms, some of which are the fluorite-like crystal CeO2; the other portion of Ce4+ entered the spinel structure of γ-Fe2O3 and led to the distortion of the γ-Fe2O3 lattice. Furthermore, it is evident that the chemisorbed oxygen content and oxidation activity of catalysts increased dramatically after Ce doping, which could be attributed to the excellent NH3-SCR and Hg0 removal performance.

中文翻译:

碳纳米管上负载的Fe–Ce混合氧化物用于同时去除烟道气中的NO和Hg 0

迫切需要开发烟气中的NO x和Hg 0的同时去除技术,但仍具有挑战性。多壁碳纳米管支撑的Fe–Ce混合氧化物纳米颗粒(Fe (2) Ce (0.5) O x / MWCNTs)是使用乙醇浸渍法制备的,用于去除DeNO x和Hg 0。在240°C和30 000 h –1的空速下,催化剂上的NO和Hg 0去除效率分别达到99.1%和88.9%。Fe-Ce混合氧化物以高度分散的形式负载在MWCNT的内部和外部,粒径为3-5 nm。铈4+以两种形式存在于多壁碳纳米管上,其中一些为萤石状晶体CeO 2。Ce的其它部分4+输入的γ -铁尖晶石结构2 ö 3和导致了γ-Fe的失真2 Ó 3晶格。此外,显而易见的是,Ce掺杂后催化剂的化学吸附氧含量和氧化活性急剧增加,这可能归因于出色的NH 3 -SCR和Hg 0去除性能。
更新日期:2018-02-24
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