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题名: The effect of Fe on Pt particle states in Pt/KL catalysts
作者: Song, Jie1, 2;  Ma, Huaijun1;  Tian, Zhijian1, 3;  Yan, Lijun4;  Xu, Zhusheng1;  Liu, Qianhe1;  Qu, Wei1
关键词: Fe-containing ;  Pt/KL ;  Pt states
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2015-02-25
DOI: 10.1016/j.apcata.2014.12.017
卷: 492, 页:31-37
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: Two types of Fe-containing Pt/KL catalysts were prepared, characterized and examined using an n-hexane aromatization reaction. Pt/FeKL contained framework Fe, which was incorporated through hydrothermal synthesis, while Pt-Fe/KL contained non-framework Fe, which was introduced through impregnation. The differences between the framework and non-framework Fe were examined using XRD, FT-IR and Mossbauer spectroscopy. Pt dispersion and reducibility as well as the electronic states of the Fe and Pt particles were detected using H-2-chemisorption, H-2-TPR and XPS, respectively. With the non-framework Fe, an electron-rich platinum species (Pt delta-) formed after reduction. With the framework Fe, an electron-deficient platinum species (Pt delta+) was detected. The n-hexane aromatization results from adding 0.3 wt% non-framework Fe include conversion after 3.5 h on stream at 450 degrees C, H-2/n-hexane =3.0 (mole ratio) and 3 h(-1) WHSV over the Pt-Fe/KL, which was maintained at 77%; these values are greater than the 41% Pt/KL and 25% Pt/FeKL. The Pt-Fe/KL benzene selectivity was 89%, which is also greater than the 83% Pt/KL and 53% Pt/FeKL. We discuss the effect of Fe on the Pt particle states and the relationship between the Pt states and catalyst activity. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: N-HEXANE AROMATIZATION ;  KL ZEOLITE ;  DEHYDROCYCLIZATION ACTIVITY ;  ISOMORPHOUS SUBSTITUTION ;  SUPPORTED PLATINUM ;  REFORMING CATALYST ;  SULFUR-TOLERANCE ;  LTL FRAMEWORK ;  VAPOR-PHASE ;  IRON
语种: 英语
WOS记录号: WOS:000350185600004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145983
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
4.PetroChina, Petrochem Res Inst, Beijing 100195, Peoples R China

Recommended Citation:
Song, Jie,Ma, Huaijun,Tian, Zhijian,et al. The effect of Fe on Pt particle states in Pt/KL catalysts[J]. APPLIED CATALYSIS A-GENERAL,2015,492:31-37.
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