Facile Fabrication of ZSM-5 Zeolite Catalyst with High Durability to Coke Formation during Catalytic Cracking of Paraffins

Inagaki, Shigenori; Shinoda, Shoma; Kaneko, Y.; Takechi, Kazuyoshi; Komatsu, Raita; Tsuboi, Yasuyuki; Yamazaki, Hiroshi; Kondo, Junko N.; Kubota, Yoshihiro

doi:10.1021/cs300426k

Cited by 105 publications

(81 citation statements)

References 51 publications

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“…For this purpose, we evaluated the effect of acid concentration and the crystallite size of zeolites on the coke formation from BTX. Modifications in terms of acid concentration and crystallite size have been reported as key factors determining the catalytic performance of zeolites in hydrocarbon cracking [29][30][31]. We carried out catalytic cracking of n-C6 at 948 K on H-ZSM-5 with Si/Al ratios of 23, 51, 62 and 107.…”

Section: Effect Of Acid Concentration and Crystallite Size Of Zeolitementioning

confidence: 99%

Factors affecting coke formation on H-ZSM-5 in naphtha cracking

Javaid

Urata

Furukawa

et al. 2015

Applied Catalysis A: General

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Section: Effect Of Acid Concentration and Crystallite Size Of Zeolitementioning

confidence: 99%

Factors affecting coke formation on H-ZSM-5 in naphtha cracking

Javaid

Urata

Furukawa

et al. 2015

Applied Catalysis A: General

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“…A post-synthetic HNO 3 treatment method was developed to selectively remove the acid sites on the external surface [124]. As a result, the treated ZSM-5 zeolite maintained high catalytic activity (about 96%) with little carbon deposition (49.7 mg·g −1 ) even after reaction for 455 min, while, for the parent ZSM-5 zeolite, the conversion decreased to about 67% with large carbon deposition (120 mg·g −1 ) (Figure 20).…”

Section: Surface Acid Sitesmentioning

confidence: 99%

Strategies to Enhance the Catalytic Performance of ZSM-5 Zeolite in Hydrocarbon Cracking: A Review

2017

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ZSM-5 zeolite is widely used in catalytic cracking of hydrocarbon, but the conventional ZSM-5 zeolite deactivates quickly due to its simple microporous and long diffusion pathway. Many studies have been done to overcome these disadvantages recently. In this review, four main approaches for enhancing the catalytic performance, namely synthesis of ZSM-5 zeolite with special morphology, hierarchical ZSM-5 zeolite, nano-sized ZSM-5 zeolite and optimization of acid properties, are discussed. ZSM-5 with special morphology such as hollow, composite and nanosheet structure can effectively increase the diffusion efficiency and accessibility of acid sites, giving high catalytic activity. The accessibility of acid sites and diffusion efficiency can also be enhanced by introducing additional mesopores or macropores. By decreasing the crystal size to nanoscale, the diffusion length can be shortened. The catalytic activity increases and the amount of carbon deposition decreases with the decrease of crystal size. By regulating the acid properties of ZSM-5 with element or compound modification, the overreaction of reactants and formation of carbon deposition could be suppressed, thus enhancing the catalytic activity and light alkene selectivity. Besides, some future needs and perspectives of ZSM-5 with excellent cracking activity are addressed for researchers' consideration.

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“…In order to evaluate regioselective deactivation of acid sites, the catalytic cracking of isopropyl benzene (cumene) and 1,3,5-triisopropyl benzene (TIPB) was carried out using a fixed-bed reactor under at a reaction temperature of 573 K N 2 flow at atmospheric pressure [34,35]. The W/F ratio (W: amount of catalyst /g, F: feed rate /g h -1 ) and the feed rate of cumene and TIPB was 0.13 h and 0.18 h, 1.0 ml/h and 1.33 ml/h, respectively.…”

Section: Cumene and Tipb Crackingmentioning

confidence: 99%

Characterization and catalytic performance of modified nano-scale ZSM-5 for the acetone-to-olefins reaction

Konno

Tago

Nakasaka

et al. 2014

Applied Catalysis A: General

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Acidity modification of ZSM-5 zeolite was examined. Phenyl silane and Tri-phenyl silane were newly used as deactivators. Catalytic properties of ZSM-5 zeolites can be controlled. 10 Modified ZSM-5 was effective in acetone-to-olefins reaction.3 AbstractIn acetone to olefins (ATO) reaction using ZSM-5 zeolite, isobutylene is initially produced from decomposition of an acetone dimer, followed by dimerization of isobutylene and its cracking to form ethylene and propylene formation. Nano-scale ZSM-5 zeolite exhibited a stable activity in ATO reaction as compared with macro-scale ZSM-5. In order to improve the 5 catalytic stability of the nano-scale ZSM-5, acidity control in the nano-scale ZSM-5 zeolite by SiO 2 unit formation was examined. Phenyl silane and tri-phenyl silane were newly used as deactivators. This modification allows the increase in the olefins yield as well as improvement of catalyst lifetime. In particular, the regioselective deactivation of acid sites located on the external surface of zeolite inhibits the aromatics formation. Moreover, the acidity control within 10 the pore extremely improves the catalyst lifetime. The acidity-controlled nano-scale ZSM-5 zeolite exhibited stable olefins yield above 55 C-mol% for 180h.

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Facile Fabrication of ZSM-5 Zeolite Catalyst with High Durability to Coke Formation during Catalytic Cracking of Paraffins

Cited by 105 publications

References 51 publications

Factors affecting coke formation on H-ZSM-5 in naphtha cracking

Factors affecting coke formation on H-ZSM-5 in naphtha cracking

Strategies to Enhance the Catalytic Performance of ZSM-5 Zeolite in Hydrocarbon Cracking: A Review

Characterization and catalytic performance of modified nano-scale ZSM-5 for the acetone-to-olefins reaction

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