Journal
ACS CATALYSIS
Volume 10, Issue 12, Pages 6822-6830Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.0c01021
Keywords
model zeolite-based catalyst; internal diffusion; catalyst effectiveness factor; hierarchical zeolite; catalytic cracking; gravimetric analysis and IR spectroscopy (AGIR)
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Funding
- Chinese Scholarship Council (CSC)
- K. C. Wong Education Foundation
- Thousand Talents Program for Foreign Experts [WQ20152100284]
- National Natural Science Foundation of China [21975285]
- Key Projects of China National Key RD Plan [2018YFE0118200]
- Key Projects of Shandong Provincial Key RD Plan [2019JZZY010506]
- Major Projects of PetroChina on Catalysts of Oil Processing [2016E-0707]
- SinoFrench International Laboratory (LIA) Zeolites
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The concept of pore hierarchization for enhancing zeolite catalytic performance has been the main focus during the past decade; the main research activities have widely emphasized the preparation of single-component hierarchical zeolite catalysts. Here we report on the critical aspect of interconnectivity of multicomponents in hierarchical zeolite catalysts using a combined gravimetric and infrared spectroscopy (AGIR) analysis. The variances of macroscopic diffusion behaviors between the global multicomponent catalyst (indexed as global diffusion time constant) and its zeolitic moiety (indexed as micropore diffusion time constant) are differentiated via simultaneous gravimetric and infrared analysis, respectively. The effectiveness factors correlated with the diffusion time constants show that the nonideal interconnectivity between the zeolitic and nonzeolitic components weakens the full potential of the multicomponent catalyst.
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