Surface chemistry and catalytic performance of chromia/alumina catalysts derived from different potassium impregnation sequences

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 热化学转化事业部

	Surface chemistry and catalytic performance of chromia/alumina catalysts derived from different potassium impregnation sequences
	Liu, Daolan 1; Bai, Peng 1; Wu, Pingping 1; Han, Dezhi 2; Chai, Yongming 1; Yan, Zifeng 1
刊名	APPLIED SURFACE SCIENCE
	2015-10-01
卷号	351 页码:250-259
关键词	Impregnation sequences Chromium catalysts Potassium Propane dehydrogenation
英文摘要	Chromia/alumina catalysts prepared with different K impregnation sequences were compared in the dehydrogenation of propane. The materials were characterized by a variety of techniques. The catalyst with K impregnated prior to Cr loading (sample Cr/K/Al2O3) exhibited higher propene selectivity than that prepared with the reverse impregnation sequence (sample K/Cr/Al2O3). Catalyst Cr/K/Al2O3 possesses a higher amount of surface acid sites and more readily reducible chromium species compared with catalyst K/Cr/Al2O3. The majority of chromium species were observed to exist as polymeric species on catalyst Cr/K/Al2O3, while isolated and oligomeric chromium species were mainly found on catalyst K/Cr/Al2O3. A detailed correlation between catalytic performance and characterization results demonstrated that isolated and oligomeric species possessed higher cracking and coking activities than polymeric chromium species, which may account for the difference in the propene selectivity of catalysts. (C) 2015 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
研究领域[WOS]	Chemistry ; Materials Science ; Physics
关键词[WOS]	CHROMIUM-OXIDE CATALYSTS ; DIFFUSE-REFLECTANCE SPECTROSCOPY ; OXIDATIVE DEHYDROGENATION ; PROPANE DEHYDROGENATION ; ISOBUTANE DEHYDROGENATION ; RAMAN-SPECTROSCOPY ; ALUMINA CATALYSTS ; CR ; BUTANE ; DEACTIVATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000359496600033
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/6501]
专题	青岛生物能源与过程研究所_热化学转化事业部
作者单位	1.China Univ Petr, Sch Chem Engn, PetroChina Key Lab Catalysis, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China
推荐引用方式 GB/T 7714	Liu, Daolan,Bai, Peng,Wu, Pingping,et al. Surface chemistry and catalytic performance of chromia/alumina catalysts derived from different potassium impregnation sequences[J]. APPLIED SURFACE SCIENCE,2015,351:250-259.
APA	Liu, Daolan,Bai, Peng,Wu, Pingping,Han, Dezhi,Chai, Yongming,&Yan, Zifeng.(2015).Surface chemistry and catalytic performance of chromia/alumina catalysts derived from different potassium impregnation sequences.APPLIED SURFACE SCIENCE,351,250-259.
MLA	Liu, Daolan,et al."Surface chemistry and catalytic performance of chromia/alumina catalysts derived from different potassium impregnation sequences".APPLIED SURFACE SCIENCE 351(2015):250-259.