Catalytic cracking of oleic acid to generate aviation kerosene using platinum–modified ZSM–5 nanosheets

BACKGROUND A series of Pt@NZSM–5 and Pt/NZSM–5 nanosheets having different Si/Al ratios were prepared via an in situ synthesis and impregnation method, respectively, using C22H45–N+(CH3)2–C6H12–N+(CH3)2–C6H13 (C22–6–6) as the template agent. The oleic acid decarboxylation reaction was carried out us...

Full description

Saved in:
Bibliographic Details
Published in:Journal of chemical technology and biotechnology (1986) 2024-11, Vol.99 (11), p.2259-2269
Main Authors: Liu, Haoyu, Ma, Jingye, Yuan, Hong, Shi, Xiang
Format: Article
Language:English
Subjects:
Acids
Alkanes
Aluminum
Atmosphere
C8–C17 alkanes
Carbon dioxide
Catalytic activity
Catalytic cracking
Decarboxylation
in situ synthesis
Nanosheets
Oleic acid
oleic acid cracking
Platinum
Silicon substrates
Thickness
ZSM–5 nanosheets
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:BACKGROUND A series of Pt@NZSM–5 and Pt/NZSM–5 nanosheets having different Si/Al ratios were prepared via an in situ synthesis and impregnation method, respectively, using C22H45–N+(CH3)2–C6H12–N+(CH3)2–C6H13 (C22–6–6) as the template agent. The oleic acid decarboxylation reaction was carried out using these materials under CO2 atmosphere and the oleic acid cracking mechanism was inferred from the product distribution of the C8‐C17 alkanes. RESULTS The Pt@NZSM–5 and Pt/NZSM–5 was found to comprise thinner nanosheets and exhibited strong metal–substrate interactions. Pt@NZSM–5 nanosheets with a Si/Al molar ratio of 100 had thicknesses of only 8–9 nm along with a mesopore/micropore capacity ratio of 2.7, an acid content of 11 cm3/g STP and a high Pt0/PtOx ratio. CONCLUSION The Pt@NZSM‐5 and Pt/NZSM‐5 nanosheets had an interconnected hierarchical system and a large number of metal active sites that facilitated the decarboxylation of oleic acid. The Pt@NZSM–5 nanosheets demonstrated excellent catalytic activity during the cracking of oleic acid under a CO2 atmosphere, giving a yield of C8–C17 alkanes as high as 83.8% after 5 h at 320 °C. These Pt@NZSM–5 nanosheets also showed greater stability than the Pt/NZSM–5 specimens. © 2024 Society of Chemical Industry (SCI).
ISSN:0268-2575
1097-4660
DOI:10.1002/jctb.7714