Nanotechnological characterization of allofanite and faujasite (Y-faujasite) catalysts and comparing with a commercial FCC catalyst (X-zeolite)

Jiménez, Edward; Lalangui, Santiago; Guacho, Edison; A, Paucar; Herrera, Paulina; Vaca, David; González, Humberto; Ochoa, Patricia; Stahl, Ullrich; López, Gabriel

doi:10.3934/matersci.2019.6.911

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…Through the above studies, some inherent laws of the structure–activity relationship for heavy-oil catalytic cracking catalysts have been found and three effective strategies of improving acid-site accessibility have been summed up. One is to shorten the diffusion length of the hydrocarbon molecules. − Another is to increase the size of the mass transfer channels to ensure that macromolecules diffuse successfully in the confined space. − The third is to optimize the distribution of zeolite components in the FCC catalysts for improving the zeolite accessibility and the catalytic reaction performance. − …”

Section: Introductionmentioning

confidence: 99%

Optimized Zeolite Distribution of FCC Catalysts for Promoting Heavy-Oil Catalytic Cracking

Zhang

Qin

et al. 2022

Ind. Eng. Chem. Res.

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The accessibility of cracking active components, mainly zeolite Y, to heavy oil molecules is the key factor to determine the performance of FCC catalysts. In this study, a novel FCC catalyst with Y zeolite components synthesized via in situ crystallization on kaolin microspheres has been designed and prepared. The distribution of the zeolite Y in the FCC catalyst microspheres has been characterized by scanning electron microscopy (SEM) and high-resolution field emission scanning electron microscopy (HR-FESEM). Differing from the random distribution of zeolite components in a commercial FCC catalyst prepared via a spray drying technique, the Y zeolite components are concentrated on the surface of the in situ crystallization FCC catalyst microspheres. The unique distribution characteristics lead to the distinctive structural properties, such as texture constructions and acid properties, mass transfer performance, and zeolite accessibility. The catalytic cracking performance of heavy oil macromolecules of the two catalysts has been investigated using a microactivity test (MAT) and advanced catalyst equipment (ACE). Based on the results, we can conclude that the unique distribution of the zeolite Y on the surface of in situ crystallization FCC catalyst microspheres plays an important role for promoting a greater ability for conversion of heavy oil, higher gasoline selectivity, and lower byproduct yield.

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Section: Introductionmentioning

confidence: 99%

Optimized Zeolite Distribution of FCC Catalysts for Promoting Heavy-Oil Catalytic Cracking

Zhang

Qin

et al. 2022

Ind. Eng. Chem. Res.

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Hierarchically porous composites containing mining tailings-based geopolymer and zeolite 13X: application for carbon dioxide sequestration

Schneider,

Rodríguez-Castellón,

Guerrero-Pérez

et al. 2024

Preprint

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One promising approach to addressing global warming involves capturing storing and reusing greenhouse gas emissions. Following separation, usually via adsorption, potential CO2 emissions capture rates can reach up to 90%. Hence, It is crucial to enhance efficiency and reduce costs associated with CO2 capture and utilization processes. This study explores the synthesis of geopolymer/zeolite composites based on phosphate amine tailings for CO2 capture applications. These materials offer benign environmental advantages and demonstrate reversible adsorption and desorption of carbon dioxide. The research compares the adsorption capacities of the synthesized materials with the geopolymer and the commercial Zeolite 13X, assessing their performance for the CO2, H2, and CO adsorption at various temperatures (30, 50, and 100°C). Furthermore, the samples underwent thorough characterization by XRF, XRD, FTIR, SEM, EDS, XPS, NMR, micro-CT, density, BET surface area, and porosity. The high surface area and low porosity of the materials influence directly in the adsorption capacity, which increases with the addition of more zeolite on the composite. The incorporation of 30% (w/w) of zeolite to the composite yielded notable adsorption capacities at 30 ºC and 1 bar (~ 2.6 mmol·g− 1).

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Nanotechnological characterization of allofanite and faujasite (Y-faujasite) catalysts and comparing with a commercial FCC catalyst (X-zeolite)

Cited by 2 publications

References 15 publications

Optimized Zeolite Distribution of FCC Catalysts for Promoting Heavy-Oil Catalytic Cracking

Optimized Zeolite Distribution of FCC Catalysts for Promoting Heavy-Oil Catalytic Cracking

Hierarchically porous composites containing mining tailings-based geopolymer and zeolite 13X: application for carbon dioxide sequestration

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