A Novel FCC Catalyst Based on a Porous Composite Material Synthesized via an In Situ Technique

Zheng, Shu-Qin; He, Lijun; Shao, Ren; Yu, Hang; Zhu, Wei

doi:10.15255/kui.2015.035

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…5, the catalysts prepared by the in-situ method and steaming-treated exhibited a type IV argon adsorption-desorption isotherms, where the presence of mesopores were attributed to the hysteresis loop with p/p 0 between 0.4 and 1.0. These type of isotherms have been previously reported in studies of zeolites embedded in matrix particles (Patrylak et al 2001;Zheng et al 2017Zheng et al , 2015. In contrast, the commercial FCC catalyst used here that is manufactured by an incorporation methodology showed a different isotherm with no defined steps (Fig.…”

Section: Properties Of the Samples In The Acid Formsupporting

confidence: 79%

Synthesis and catalytic behavior of FCC catalysts obtained from kaolin by the in-situ method

Padilla

Guzmán

Poveda-Jaramillo

2022

Braz. J. Chem. Eng.

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In-situ zeolites NaY and Na[B]Y were synthesized on microspherical matrices of kaolin to obtain FCC catalysts. An alkaline pretreatment of the matrix was investigated in order to evaluate its effect on matrix properties and crystallization of the in-situ synthetized zeolites. Catalysts were characterized by SEM, TEM, Ar adsorption, XRD and NH3-TPD. It was observed an increase in the surface area and mesoporosity of the alkaline treated catalysts either synthetized with the presence of boron or with no boron in the hydrothermal reaction mixture. Ammonia TPD analyses have shown an increase in the amount and strength of the acidity of the catalysis with the zeolites crystallized on the pretreated matrices and exchanged with lanthanum ions. Thus, a combination between higher concentration of stronger acid sites and higher proportion of mesoporous generated in the matrices treated with alkaline solution had resulted in more active catalyst as shown by the triisopropylbenzene cracking experiments conducted here. Graphical abstract

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Section: Properties Of the Samples In The Acid Formsupporting

confidence: 79%

Synthesis and catalytic behavior of FCC catalysts obtained from kaolin by the in-situ method

Padilla

Guzmán

Poveda-Jaramillo

2022

Braz. J. Chem. Eng.

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“…The in situ synthesis of zeolite Y from kaolin has been reported using a mixture of metakaolin microspheres calcined at 700°C and/or kaolin microspheres calcined at 1000°C (Xu et al, 2000;Patrylak et al, 2001;Wei et al, 2010;Zhang & Xiong, 2012a;Zheng et al, 2015). In this work, instead of making a mixture of calcined microspheres, homogeneous particles were prepared using proportions based on the analysis of thermally and chemically treated kaolin.…”

Section: In Situ Crystallization Of Naymentioning

confidence: 99%

Structural transformation of kaolin as an active matrix for the in situ synthesis of zeolite Y

et al. 2020

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To produce an optimized matrix for the in situ crystallization of zeolite Y, a commercial kaolin chemically treated with NaOH solution at 97°C for 24 h and thermally transformed from 750 to 1100°C was studied. The kaolin calcined at 750°C has 20% more reactive tetrahedral aluminium species for the synthesis of zeolite Y than kaolin calcined at 865°C. The kaolin calcined at 1000°C has amorphous silica zones that may be extracted using caustic solution; this increases the surface area by a factor of 16 and generates mesopores ~5 nm in diameter. These structural changes in the calcined and treated kaolins were combined to prepare microspheres of the mesoporous matrix, upon which well-dispersed crystals of zeolite Y crystallized.

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“…11 The catalyst was initially steam-deactivated at 800 °C for 17 h with 100 % steam. The reaction conditions: reactor temperature of 520 °C, WHSV of 19 h −1 and catalyst-to-oil mass ratio of 7.0.…”

Section: Catalytic Properties Evaluationmentioning

confidence: 99%

An FCC Catalyst for Maximizing Gasoline Yield

He¹,

Zheng²,

Dai³

2017

Kem. Ind.

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A Y zeolite-containing wide-pore composite was synthesized by in situ technique using polyvinyl alcohol and silica sol material. A fluid catalytic cracking (FCC) catalyst for maximizing gasoline yield was successfully developed with the modified composition. The as-made zeolite Y in its sodium form had a relative crystallinity of 52.9 % with a high silica/alumina amount of substance ratio of 5.7. The FTIR analysis showed that the acid distribution of the catalyst modified with rare earth, phosphorus and steaming stabilization process was more concentrated on the range of intermediate and strong acidity. This kind of modification can direct more hydrocarbons to enter into the pores to be converted, as well as remarkably increases the possibility of gasoline formation through a cracking reaction. The nitrogen adsorption-desorption analysis showed that the catalyst had more meso-and macro-pores distribution, which can effectively reduce the mass-transfer resistance in the reaction process and accelerate the diffusion of the product molecules. The evaluated results indicated that the prepared catalyst could decrease the excessive cracking of middle distillate and improve the gasoline yield effectively. The gasoline yield by mass had increased by 2.69 %, while the coke yield and dry gas yield had decreased by 0.91 % and 0.19 %, respectively, and then the olefin content by volume in the cracked gasoline reduced by 4.6 %, the research octane number (RON) and motor octane number (MON) increased by 0.6 and 0.5, respectively. The good product selectivity and higher gasoline yields of the prepared catalyst were obviously related to its wide pore structure and its optimized acidity distribution.

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A Novel FCC Catalyst Based on a Porous Composite Material Synthesized via an In Situ Technique

Abstract: Ključne riječi

Cited by 5 publications

References 18 publications

Synthesis and catalytic behavior of FCC catalysts obtained from kaolin by the in-situ method

Synthesis and catalytic behavior of FCC catalysts obtained from kaolin by the in-situ method

Structural transformation of kaolin as an active matrix for the in situ synthesis of zeolite Y

An FCC Catalyst for Maximizing Gasoline Yield

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