Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts

Abstract Potassium (K) ion-exchanged ZSM-5 zeolites were investigated for catalytic soot combustion. X-ray absorption fine-structure (XAFS), Raman, in situ IR and NH3-temperature programmed desorption (NH3-TPD) confirmed the location of K+ at the ion-exchanged sites. Temperature-programmed oxidation...

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Autores principales:	Chenxi Lu, Taizheng Liu, Qiaolan Shi, Qian Li, Ying Xin, Lei Zheng, Zhaoliang Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d31cfb039f884fa0ad116493abafc236
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spelling	oai:doaj.org-article:d31cfb039f884fa0ad116493abafc2362021-12-02T11:41:20ZPlausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts10.1038/s41598-017-03504-32045-2322https://doaj.org/article/d31cfb039f884fa0ad116493abafc2362017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03504-3https://doaj.org/toc/2045-2322Abstract Potassium (K) ion-exchanged ZSM-5 zeolites were investigated for catalytic soot combustion. X-ray absorption fine-structure (XAFS), Raman, in situ IR and NH3-temperature programmed desorption (NH3-TPD) confirmed the location of K+ at the ion-exchanged sites. Temperature-programmed oxidation (TPO) reactions showed that K-ZSM-5 decreased ignition tempeatures of soot combustion and increased selectivity to CO2. The improved activity for soot combustion by increasing K+-exchanged amounts via decreasing the Si/Al ratio reinforced the K+ ions participating in soot combustion. 18O2 isotopic isothermal reactions suggested the activation of gaseous oxygen by the K+ ions. This demonstrated a new appliction of alkali metal exchanged zeolites and the strategy for enhancement of catalytic soot combustion activity.Chenxi LuTaizheng LiuQiaolan ShiQian LiYing XinLei ZhengZhaoliang ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chenxi Lu Taizheng Liu Qiaolan Shi Qian Li Ying Xin Lei Zheng Zhaoliang Zhang Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
description	Abstract Potassium (K) ion-exchanged ZSM-5 zeolites were investigated for catalytic soot combustion. X-ray absorption fine-structure (XAFS), Raman, in situ IR and NH3-temperature programmed desorption (NH3-TPD) confirmed the location of K+ at the ion-exchanged sites. Temperature-programmed oxidation (TPO) reactions showed that K-ZSM-5 decreased ignition tempeatures of soot combustion and increased selectivity to CO2. The improved activity for soot combustion by increasing K+-exchanged amounts via decreasing the Si/Al ratio reinforced the K+ ions participating in soot combustion. 18O2 isotopic isothermal reactions suggested the activation of gaseous oxygen by the K+ ions. This demonstrated a new appliction of alkali metal exchanged zeolites and the strategy for enhancement of catalytic soot combustion activity.
format	article
author	Chenxi Lu Taizheng Liu Qiaolan Shi Qian Li Ying Xin Lei Zheng Zhaoliang Zhang
author_facet	Chenxi Lu Taizheng Liu Qiaolan Shi Qian Li Ying Xin Lei Zheng Zhaoliang Zhang
author_sort	Chenxi Lu
title	Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_short	Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_full	Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_fullStr	Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_full_unstemmed	Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_sort	plausibility of potassium ion-exchanged zsm-5 as soot combustion catalysts
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d31cfb039f884fa0ad116493abafc236
work_keys_str_mv	AT chenxilu plausibilityofpotassiumionexchangedzsm5assootcombustioncatalysts AT taizhengliu plausibilityofpotassiumionexchangedzsm5assootcombustioncatalysts AT qiaolanshi plausibilityofpotassiumionexchangedzsm5assootcombustioncatalysts AT qianli plausibilityofpotassiumionexchangedzsm5assootcombustioncatalysts AT yingxin plausibilityofpotassiumionexchangedzsm5assootcombustioncatalysts AT leizheng plausibilityofpotassiumionexchangedzsm5assootcombustioncatalysts AT zhaoliangzhang plausibilityofpotassiumionexchangedzsm5assootcombustioncatalysts
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Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts

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