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The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane
Yu, Jiafeng1,3; Wang, Rui2; Ren, Shiyuan2; Sun, Xiaoyan2,3; Chen, Chunlin2; Ge, Qingjie1; Fang, Wen1,3; Zhang, Jian2; Xu, Hengyong1; Su, Dang Sheng2
KeywordCalcium Coke Dehydrogenation Heterogeneous Catalysis Platinum
Source PublicationCHEMCATCHEM
2012-09-01
DOI10.1002/cctc.201200067
Volume4Issue:9Pages:1376-1381
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordTRANSFORM INFRARED-SPECTROSCOPY ; PT/GAMMA-AL2O3 CATALYST ; ALKANE DEHYDROGENATION ; COKE CHARACTERIZATION ; PLATINUM ; XPS ; ADSORPTION ; METAL ; METHYLCYCLOHEXANE ; ISOMERIZATION
AbstractCoke-induced deactivation is one of the major challenges in the field of heterogeneous catalysis. Herein, the performance of the Pt/Al2O3 catalyst for the hydrogen-free dehydrogenation of cyclohexane was improved by doping with a small amount of Ca. The Ca-modified Pt/Al2O3 catalyst exhibited a cyclohexane conversion of 97.0?% and maintained a conversion above 75?% after 48 h, whilst the unmodified catalyst was deactivated from 87.0 to 2.7?% under the same conditions. Characterization techniques, including in situ DRIFT, XPS, thermal analysis, and temperature-programmed techniques, revealed that the presence of Ca effectively suppressed the deep dehydrogenation of H-rich carbonaceous components and promoted coke desorption by increasing the H/C ratio of H-deficient coke. This promotion effect of Ca was also associated with neutralizing the residual Cl ions and promoting immediate dehydrogenation.
Language英语
WOS IDWOS:000308037400022
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/143142
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dept State Key Lab Catalysis Inst, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Yu, Jiafeng,Wang, Rui,Ren, Shiyuan,et al. The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane[J]. CHEMCATCHEM,2012,4(9):1376-1381.
APA Yu, Jiafeng.,Wang, Rui.,Ren, Shiyuan.,Sun, Xiaoyan.,Chen, Chunlin.,...&Su, Dang Sheng.(2012).The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane.CHEMCATCHEM,4(9),1376-1381.
MLA Yu, Jiafeng,et al."The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane".CHEMCATCHEM 4.9(2012):1376-1381.
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