Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH3 over commercial coal-based activated coke

Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH3 over commercial coal-based activated coke

Surface chemical properties of typical commercial coal-based activated cokes were characterized by X-ray photoelectron spectroscopy (XPS) and acid-base titration, and then the influence of surface chemical properties on catalytic performance of activated cokes of NO reduction with NH3 was investigat...

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Main Authors: Wei Xie, Zhongchao Sun, Yinwu Xiong, Lanting Li, Tao Wu, Daming Liang
Format: Article
Language:English
Published: Elsevier 2014-07-01
Series:International Journal of Mining Science and Technology
Online Access:http://www.sciencedirect.com/science/article/pii/S2095268614000822
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spelling doaj-8cb57cdd662248358ddaa65d4b6faf062020-11-24T23:38:04ZengElsevierInternational Journal of Mining Science and Technology2095-26862014-07-01244471475Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH3 over commercial coal-based activated cokeWei Xie0Zhongchao Sun1Yinwu Xiong2Lanting Li3Tao Wu4Daming Liang5Corresponding author. Tel.: +86 10 84262964.; Beijing Research Institute of Coal Chemistry, China Coal Research Institute, Beijing 100013, China; State Key Laboratory of Coal Mining and Environment Protection, Beijing 100013, China; Beijing Key Laboratory of Coal Based Carbon Materials, Beijing 100013, ChinaBeijing Research Institute of Coal Chemistry, China Coal Research Institute, Beijing 100013, China; State Key Laboratory of Coal Mining and Environment Protection, Beijing 100013, China; Beijing Key Laboratory of Coal Based Carbon Materials, Beijing 100013, ChinaBeijing Research Institute of Coal Chemistry, China Coal Research Institute, Beijing 100013, China; State Key Laboratory of Coal Mining and Environment Protection, Beijing 100013, China; Beijing Key Laboratory of Coal Based Carbon Materials, Beijing 100013, ChinaBeijing Research Institute of Coal Chemistry, China Coal Research Institute, Beijing 100013, China; State Key Laboratory of Coal Mining and Environment Protection, Beijing 100013, China; Beijing Key Laboratory of Coal Based Carbon Materials, Beijing 100013, ChinaBeijing Research Institute of Coal Chemistry, China Coal Research Institute, Beijing 100013, China; State Key Laboratory of Coal Mining and Environment Protection, Beijing 100013, China; Beijing Key Laboratory of Coal Based Carbon Materials, Beijing 100013, ChinaBeijing Research Institute of Coal Chemistry, China Coal Research Institute, Beijing 100013, China; State Key Laboratory of Coal Mining and Environment Protection, Beijing 100013, China; Beijing Key Laboratory of Coal Based Carbon Materials, Beijing 100013, ChinaSurface chemical properties of typical commercial coal-based activated cokes were characterized by X-ray photoelectron spectroscopy (XPS) and acid-base titration, and then the influence of surface chemical properties on catalytic performance of activated cokes of NO reduction with NH3 was investigated in a fixed-bed quartz micro reactor at 150 °C. The results indicate that the selective catalytic reduction (SCR) activity of activated cokes with the increase of its surface acidic sites and oxygen content, obviously, a correlation between catalytic activity and surface acidic sites content by titration has higher linearity than catalytic activity and surface oxygen content by XPS. While basic sites content by acid-base titration have not correlation with SCR activity. It has been proposed that surface basic sites content measured by titration may not be on adjacent of acidic surface oxides and then cannot form of NO2-like species, thus the reaction of reduction of NO with NH3 have been retarded. Keywords: Activated coke, SCR, Surface chemical properties, Catalytic reductionhttp://www.sciencedirect.com/science/article/pii/S2095268614000822
collection DOAJ
language English
format Article
sources DOAJ
author Wei Xie
Zhongchao Sun
Yinwu Xiong
Lanting Li
Tao Wu
Daming Liang
spellingShingle Wei Xie
Zhongchao Sun
Yinwu Xiong
Lanting Li
Tao Wu
Daming Liang
Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH3 over commercial coal-based activated coke
International Journal of Mining Science and Technology
author_facet Wei Xie
Zhongchao Sun
Yinwu Xiong
Lanting Li
Tao Wu
Daming Liang
author_sort Wei Xie
title Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH3 over commercial coal-based activated coke
title_short Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH3 over commercial coal-based activated coke
title_full Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH3 over commercial coal-based activated coke
title_fullStr Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH3 over commercial coal-based activated coke
title_full_unstemmed Effects of surface chemical properties of activated coke on selective catalytic reduction of NO with NH3 over commercial coal-based activated coke
title_sort effects of surface chemical properties of activated coke on selective catalytic reduction of no with nh3 over commercial coal-based activated coke
publisher Elsevier
series International Journal of Mining Science and Technology
issn 2095-2686
publishDate 2014-07-01
description Surface chemical properties of typical commercial coal-based activated cokes were characterized by X-ray photoelectron spectroscopy (XPS) and acid-base titration, and then the influence of surface chemical properties on catalytic performance of activated cokes of NO reduction with NH3 was investigated in a fixed-bed quartz micro reactor at 150 °C. The results indicate that the selective catalytic reduction (SCR) activity of activated cokes with the increase of its surface acidic sites and oxygen content, obviously, a correlation between catalytic activity and surface acidic sites content by titration has higher linearity than catalytic activity and surface oxygen content by XPS. While basic sites content by acid-base titration have not correlation with SCR activity. It has been proposed that surface basic sites content measured by titration may not be on adjacent of acidic surface oxides and then cannot form of NO2-like species, thus the reaction of reduction of NO with NH3 have been retarded. Keywords: Activated coke, SCR, Surface chemical properties, Catalytic reduction
url http://www.sciencedirect.com/science/article/pii/S2095268614000822
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