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The effect of Fe on Pt particle states in Pt/KL catalysts
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
2015-02-25
DOI10.1016/j.apcata.2014.12.017
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
关键词[WOS]N-HEXANE AROMATIZATION ; KL ZEOLITE ; DEHYDROCYCLIZATION ACTIVITY ; ISOMORPHOUS SUBSTITUTION ; SUPPORTED PLATINUM ; REFORMING CATALYST ; SULFUR-TOLERANCE ; LTL FRAMEWORK ; VAPOR-PHASE ; IRON
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.
语种英语
WOS记录号WOS:000350185600004
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/145983
专题中国科学院大连化学物理研究所
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
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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.
APA Song, Jie.,Ma, Huaijun.,Tian, Zhijian.,Yan, Lijun.,Xu, Zhusheng.,...&Qu, Wei.(2015).The effect of Fe on Pt particle states in Pt/KL catalysts.APPLIED CATALYSIS A-GENERAL,492,31-37.
MLA Song, Jie,et al."The effect of Fe on Pt particle states in Pt/KL catalysts".APPLIED CATALYSIS A-GENERAL 492(2015):31-37.
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