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Design of Pt/SAPO-11 bifunctional catalyst with superior metal-acid balance constructedviaa novel one-step pre-loading strategy for enhancingn-dodecane hydroisomerization performance
Du, YY; Yao, HL; Hu, WJ; Tan, YC; Xu, YH; Fu, WJ; Yuan, L; Li, JS
2020-09-07
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Issue17Pages:5953
SubtypeArticle
AbstractA novel metal preloading route is proposed to prepare Pt/SAPO-11 bifunctional catalysts. The addition of platinum brings about an increase in catalyst product yield with a growth rate of 87% attributed to chemical adsorption between Pt and the lone pair of electrons in the nitrogen atom of the structure-directing agent. More interestingly, it can be concluded from the HAADF-STEM, SE-STEM images and DRIFTS data on CO adsorption, there are small Pt nanoparticles confined inside the SAPO-11 molecular sieve, while the big Pt nanoparticles are dispersed on the surface. The synergistic effect between the metal sites and acid sites can be improved by the enhancement of metal-acid balance, by adjusting then(Pt)/n(A)ratio. A better metal-acid balance property is achieved and the carbenium ion can quickly go through the hydrogenating reaction on Pt nanoparticles, hence shortening the time it is trapped in the acid sites uponn-dodecane hydroisomerization. Consequently, the cracking reaction can be effectively avoided and liquid yield as high as 99% and isomer yield up to 84% is produced, much superior than the Pt/SAPO-11 catalyst synthesizedviathe traditional impregnation method of Pt with the maximum isomer yield of 52%. Moreover, more multi-branched isomers are produced and can further help improve the low-temperature rheology when used as lubricant base oil.
DOI10.1039/d0cy01113d
WOS KeywordN-OCTANE HYDROISOMERIZATION ; SELECTIVE ISOMERIZATION ; ZEOLITE ; SAPO-11 ; HYDROCONVERSION ; ALKANES ; SITES ; HYDROCRACKING ; METHYLAMINE ; ADSORPTION
Language英语
WOS Research AreaChemistry
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27767
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Du, YY,Yao, HL,Hu, WJ,et al. Design of Pt/SAPO-11 bifunctional catalyst with superior metal-acid balance constructedviaa novel one-step pre-loading strategy for enhancingn-dodecane hydroisomerization performance[J]. CATALYSIS SCIENCE & TECHNOLOGY,2020(17):5953.
APA Du, YY.,Yao, HL.,Hu, WJ.,Tan, YC.,Xu, YH.,...&Li, JS.(2020).Design of Pt/SAPO-11 bifunctional catalyst with superior metal-acid balance constructedviaa novel one-step pre-loading strategy for enhancingn-dodecane hydroisomerization performance.CATALYSIS SCIENCE & TECHNOLOGY(17),5953.
MLA Du, YY,et al."Design of Pt/SAPO-11 bifunctional catalyst with superior metal-acid balance constructedviaa novel one-step pre-loading strategy for enhancingn-dodecane hydroisomerization performance".CATALYSIS SCIENCE & TECHNOLOGY .17(2020):5953.
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