Catalytic function of boron to creating interconnected mesoporosity in microporous Y zeolites and its high performance in hydrocarbon cracking

Mi, Shuo; Tao, Wei; Sun, Jianxue; Liu, Peng; Li, Xiaohui; Zheng, Qingqing; Gong, Kecheng; Liu, Xianchun; Gao, Xionghou; Wang, Baojie; Zhao, Hongjuan; Liu, Honghai; Shen, Baojian

doi:10.1016/j.jcat.2017.01.017

Cited by 43 publications

(47 citation statements)

References 71 publications

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“…Owing to tunable porosity and molecule shape selectivity, zeolites can be used as adsorbent, ion-exchange material and catalysts, and so on [7][8][9][10][11]. A large variety of reactions such as cracking, isomerization, dewaxing, dehydration, hydrodeoxygenation and alkylation can be accomplished with microporous zeolites [12][13][14][15][16][17][18]. Moreover, the applications of zeolites in the fields of separation, chemical sensors, anticorrosive coating, low-k materials, and hydrophilic antimicrobial coatings are a research hotspot at present [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Zhang

Liu

et al. 2018

Catalysts

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In this paper, a comparative study of MFI zeolite derived from different silica sources is presented. Dry gel conversion (DGC) method is used to synthesize silicalite-1 and ZSM-5 with MFI structure. Two kinds of silica sources with different particle sizes are used during the synthesis of MFI zeolite. The as-prepared samples were characterized by X-ray diffraction (XRD), N2-sorption, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and X-ray fluorescence spectrometer (XRF). From the characterization results, it could be seen that the high-quality coffin-like silicalite-1 was synthesized using silica sphere with particle size of 300 nm as silica source, with crystallization time being shortened to 2 h. The schematic diagram of silicalite-1 formation using silica sources with different particle sizes is summarized. ZSM-5 was obtained by adding Al atoms to raw materials during the synthesis of MFI zeolite. The performance of aqueous phase eugenol hydrodeoxygenation over Pd/C-ZSM-5 catalyst is evaluated.

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Section: Introductionmentioning

confidence: 99%

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Zhang

Liu

et al. 2018

Catalysts

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“…This hierarchical USY was tested as a cracking catalyst for 2,2,4-trimethylpentane (isooctane) and TIPB wherein it showed a higher catalytic activity, as well as a 2.1% increase in gasoline yield. [316] As was mentioned earlier, dealumination can also be used to create silanol nests wherein Lewis acid ions (e.g., Sn, Hf) can be immobilized. This was done in multiple works from Zhu et al in which Sn was impregnated.…”

Section: Ultrastable Y Zeolite (Usy)mentioning

confidence: 97%

“…This hierarchical USY was tested as a cracking catalyst for 2,2,4‐trimethylpentane (iso‐octane) and TIPB wherein it showed a higher catalytic activity, as well as a 2.1% increase in gasoline yield. [ 316 ]…”

Section: Synthesis Of Hierarchical 12‐mr Zeolitesmentioning

confidence: 99%

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

et al. 2020

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Zeolites are highly crystalline aluminosilicates with welldefined pores that are constructed of SiO 2 and AlO 4 tetrahedra. These tetrahedra can be linked together in different unique ways to form various materials with a specific topology. [1] According to the International Zeolite Association (IZA), more than 250 different topologies, which are all assigned with a three-letter code, have been identified. [2] The micropores in zeolites are typically constructed from 8, 10, or 12 tetrahedral atoms

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“…The 1,3,5-TIPB was selected as a model compound, given its special combination of aromatic and iso-paraffin functionalities [35]. Additionally, the 1,3,5-TIPB used is considered a valuable model species given its 9.4 A • critical molecular diameter, which allows combined diffusional and catalytic effects in Y zeolites [36][37][38][39]. All products from 1,3,5-TIPB conversion were identified and quantified using GC-MS analyses.…”

Section: Feedstock and Catalystsmentioning

confidence: 99%

Catalyst/Feedstock Ratio Effect on FCC Using Different Catalysts Samples

Alkhlel

Lasa

2019

Catalysts

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The present study is a follow-up to a recent authors contribution which describes the effect of the C/O (catalyst/oil) ratio on catalytic cracking activity and catalyst deactivation. This study, while valuable, was limited to one fluidized catalytic cracking (FCC) catalyst. The aim of the present study is to consider the C/O effect using three FCC catalysts with different activities and acidities. Catalysts were characterized in terms of crystallinity, total acidity, specific surface Area (SSA), temperature programmed ammonia desorption (NH3-TPD), and pyridine chemisorption. 1,3,5-TIPB (1,3,5-tri-isopropyl benzene) catalytic cracking runs were carried out in a bench-scale mini-fluidized batch unit CREC (chemical reactor engineering centre) riser simulator. All data were taken at 550 °C with a contact time of 7 s. Every experiment involved 0.2 g of 1,3,5-TIPB with the amount of catalyst changing in the 0.12–1 g range. The resulting 0.6–5 g oil/g cat ratios showed a consistent 1,3,5-TIPB conversion increasing first, then stabilizing, and finally decreasing modestly. On the other hand, coke formation and undesirable benzene selectivity always rose. Thus, the reported results show that catalyst density affects both catalyst coking and deactivation, displaying an optimum C/O ratio, achieving maximum hydrocarbon conversions in FCC units.

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Catalytic function of boron to creating interconnected mesoporosity in microporous Y zeolites and its high performance in hydrocarbon cracking

Cited by 43 publications

References 71 publications

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

Catalyst/Feedstock Ratio Effect on FCC Using Different Catalysts Samples

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