Cr⁶⁺ Loaded Lewis Acidic Sn-Beta Zeolites as Reusable Catalysts for Selective Production of Light Olefins via Polyolefin Cracking

Kokuryo, Shinya; Tsubota, Soshi; Miyake, Koji et al.

Advanced Sustainable Systems, 2024, 9(3), 2400625

アクセス数:428件（2025-08-29 01:46 集計）

固定URL: https://hdl.handle.net/11094/98883

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タイトル
Cr⁶⁺ Loaded Lewis Acidic Sn-Beta Zeolites as Reusable Catalysts for Selective Production of Light Olefins via Polyolefin Cracking
著者
著者名
Kokuryo, Shinya
著者名
Tsubota, Soshi
NRID
1000040844717 1000040844717
ORCID
0000-0001-9868-5391 0000-0001-9868-5391
researchmap permalink
7000028816 7000028816
Scopus Author ID
56594314800 56594314800
著者名
Miyake, Koji
NRID
1000060559558 1000060559558
ORCID
0000-0001-5043-9239 0000-0001-5043-9239
researchmap permalink
Yoshiaki_Uchida Yoshiaki_Uchida
Scopus Author ID
8348749200 8348749200
著者名
Uchida, Yoshiaki
著者名
Mizusawa, Atsushi
著者名
Kubo, Tadashi
NRID
1000010283730 1000010283730
researchmap permalink
read0046501 read0046501
Scopus Author ID
7201750198 7201750198
著者名
Nishiyama, Norikazu
キーワード等
catalytic cracking
coking inhibition
lewis acid
light olefin
polyolefin
zeolites
内容
Kokuryo S., Tsubota S., Miyake K., et al. Cr⁶⁺ Loaded Lewis Acidic Sn-Beta Zeolites as Reusable Catalysts for Selective Production of Light Olefins via Polyolefin Cracking. Advanced Sustainable Systems, (2024); https://doi.org/10.1002/adsu.202400625.
抄録
Catalysts for the selective recovery of light olefins from polyolefins should be developed to save limited fossil resources. It is previously revealed that Brønsted acid-free Sn-Beta zeolites selectively produced light olefins from polyolefin cracking. Brønsted acid sites ionize olefins by protonation and the generated carbenium ions are converted into other hydrocarbons via various reactions, thereby the elimination of their effects led to the improvement of light olefin production ability. However, the deactivation of zeolites by coke deposition is a critical problem for industrialization. Inhibition of coking deactivation is previously achieved by doping Cr⁶⁺ species connected to silanol groups in zeolites. This work aimed to inhibit coke deposition and realize selective and continuous production of light olefins through repetitive polyolefin catalytic cracking. Sn-Beta zeolites are prepared with various crystallinity by changing the feed fluoride ions content in their synthesis and found that their activity on low-density polyethylene (LDPE) cracking strongly depended on the feed F/Si ratios, implying the active sites for polyolefin cracking are Lewis acidic open-Sn sites. Moreover, Cr⁶⁺-doped Sn-Beta zeolites showed over 45% light olefin yields even in the third LDPE cracking test, although excess Cr adding led to reduce the catalytic activity of Sn-Beta zeolites.
出版者
John Wiley and Sons Inc
収録物名
Advanced Sustainable Systems
巻(号)
9(3)
ページ
2400625
刊行年月
2024-11-07
言語
英語
ハンドルURL
https://hdl.handle.net/11094/98883
eISSN
23667486
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1002/adsu.202400625
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article