Skeletal isomerization of tetradecane catalyzed by TON-type zeolites with a fragmented core-shell structure

Masaki Okamoto; Lili Huang; Midori Yamano; Sayuri Sawayama; Yohei Nishimura

doi:10.1016/j.apcata.2013.01.030

Skeletal isomerization of tetradecane catalyzed by TON-type zeolites with a fragmented core-shell structure

Masaki Okamoto, Lili Huang, Midori Yamano, Sayuri Sawayama, Yohei Nishimura

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

TON-type zeolites with a core-shell structure were synthesized by crystal overgrowth of an aluminum-free TON-type zeolite on an aluminum-containing TON-type zeolite in the presence of fluoride ion, which was used as a mineralizing reagent to restrain the formation of defects. The core-shell structured zeolite showed greater selectivity for skeletal isomerization in tetradecane hydroisomerization because the acid sites on the external surface of needle-shaped crystals were passivated to inhibit cracking. Breaking the needle-shaped crystals of the core-shell structure to create shorter crystal pieces effectively enhanced the catalytic activity and selectivity for isomerization because new pore entrances were formed.

Original language	English
Pages (from-to)	122-128
Number of pages	7
Journal	Applied Catalysis A: General
Volume	455
DOIs	https://doi.org/10.1016/j.apcata.2013.01.030
Publication status	Published - 2013 Mar 30
Externally published	Yes

Keywords

Core-shell structure
Isomerization
Passivation
TON-type zeolite

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

Access to Document

10.1016/j.apcata.2013.01.030

Cite this

@article{6dc1f474e8fb491c8314268fbdc5171d,

title = "Skeletal isomerization of tetradecane catalyzed by TON-type zeolites with a fragmented core-shell structure",

abstract = "TON-type zeolites with a core-shell structure were synthesized by crystal overgrowth of an aluminum-free TON-type zeolite on an aluminum-containing TON-type zeolite in the presence of fluoride ion, which was used as a mineralizing reagent to restrain the formation of defects. The core-shell structured zeolite showed greater selectivity for skeletal isomerization in tetradecane hydroisomerization because the acid sites on the external surface of needle-shaped crystals were passivated to inhibit cracking. Breaking the needle-shaped crystals of the core-shell structure to create shorter crystal pieces effectively enhanced the catalytic activity and selectivity for isomerization because new pore entrances were formed.",

keywords = "Core-shell structure, Isomerization, Passivation, TON-type zeolite",

author = "Masaki Okamoto and Lili Huang and Midori Yamano and Sayuri Sawayama and Yohei Nishimura",

note = "Funding Information: This work was supported by JSPS KAKENHI Grant Number 21550187 . We thank the Art and Crafts Education and Research Support Center in Tokyo Institute of Technology for help with the SEM images. The SEM observations and WDS analyzes were performed at the Center for Advanced Materials Analysis in Tokyo Institute of Technology. ",

year = "2013",

month = mar,

day = "30",

doi = "10.1016/j.apcata.2013.01.030",

language = "English",

volume = "455",

pages = "122--128",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier",

}

TY - JOUR

T1 - Skeletal isomerization of tetradecane catalyzed by TON-type zeolites with a fragmented core-shell structure

AU - Okamoto, Masaki

AU - Huang, Lili

AU - Yamano, Midori

AU - Sawayama, Sayuri

AU - Nishimura, Yohei

N1 - Funding Information: This work was supported by JSPS KAKENHI Grant Number 21550187 . We thank the Art and Crafts Education and Research Support Center in Tokyo Institute of Technology for help with the SEM images. The SEM observations and WDS analyzes were performed at the Center for Advanced Materials Analysis in Tokyo Institute of Technology.

PY - 2013/3/30

Y1 - 2013/3/30

N2 - TON-type zeolites with a core-shell structure were synthesized by crystal overgrowth of an aluminum-free TON-type zeolite on an aluminum-containing TON-type zeolite in the presence of fluoride ion, which was used as a mineralizing reagent to restrain the formation of defects. The core-shell structured zeolite showed greater selectivity for skeletal isomerization in tetradecane hydroisomerization because the acid sites on the external surface of needle-shaped crystals were passivated to inhibit cracking. Breaking the needle-shaped crystals of the core-shell structure to create shorter crystal pieces effectively enhanced the catalytic activity and selectivity for isomerization because new pore entrances were formed.

AB - TON-type zeolites with a core-shell structure were synthesized by crystal overgrowth of an aluminum-free TON-type zeolite on an aluminum-containing TON-type zeolite in the presence of fluoride ion, which was used as a mineralizing reagent to restrain the formation of defects. The core-shell structured zeolite showed greater selectivity for skeletal isomerization in tetradecane hydroisomerization because the acid sites on the external surface of needle-shaped crystals were passivated to inhibit cracking. Breaking the needle-shaped crystals of the core-shell structure to create shorter crystal pieces effectively enhanced the catalytic activity and selectivity for isomerization because new pore entrances were formed.

KW - Core-shell structure

KW - Isomerization

KW - Passivation

KW - TON-type zeolite

UR - http://www.scopus.com/inward/record.url?scp=84875986022&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875986022&partnerID=8YFLogxK

U2 - 10.1016/j.apcata.2013.01.030

DO - 10.1016/j.apcata.2013.01.030

M3 - Article

AN - SCOPUS:84875986022

SN - 0926-860X

VL - 455

SP - 122

EP - 128

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

ER -

Skeletal isomerization of tetradecane catalyzed by TON-type zeolites with a fragmented core-shell structure

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this