Ferrierite zeolite passivation and its catalytic application in toluene disproportionation

Mesa, Sandra Lucía Restrepo; Arboleda, Johana; Echavarrı́a, Adriana; López-Suárez, F. E.

doi:10.1016/j.ces.2019.08.005

Cited by 7 publications

(2 citation statements)

References 31 publications

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“…Furthermore, Liu (Liu et al, 2015) proposed a new double flash process and heat integration for improved energy utilization. Studies on various catalysts have also been conducted for the hydrodealkylation of toluene, resulting in different side products (varying composition of the resulting products) (Mesa et al, 2019) (Albahar et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Hydrodealkylation of Toluene Using Conversion Reactor

Agustriyanto,

Setyopratomo,

Mochni

et al. 2024

saintek

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Abstract—The hydrodealkylation of toluene is frequently used to produce the more valuable compound benzene. This process is widely employed in the petrochemical industry. Through hydrodealkylation, toluene undergoes a transformation, resulting in the production of valuable chemicals such as benzene and diphenyl. The objective of this study is to present the results obtained from simulating the process of toluene dealkylation using Aspen HYSYS. The feed to the reactor must contain toluene and hydrogen, while the recommended operating conditions are at 500 oC to 650 oC and 20 to 40 atm pressure to achieve 90% conversion. For this purpose, a conversion reactor has been selected as the preferred type. The simulation outcomes are particularly valuable during the initial stages of designing a production facility for benzene. The mass and energy balance calculations can be easily performed using Aspen HYSYS. Future research may focus on investigating different reactor types while considering the kinetics of the reaction. Keywords: aspen HYSYS, hydrodealkylation, simulation, toluene Abstrak—Hidrodealkilasi toluena sering digunakan untuk menghasilkan senyawa yang lebih bernilai yaitu benzene. Proses ini banyak digunakan dalam industri petrokimia. Melalui hidrodealkilasi, toluena mengalami transformasi, menghasilkan bahan kimia berharga seperti benzene dan diphenyl. Tujuan dari penelitian ini adalah untuk menyajikan hasil yang diperoleh dari mensimulasikan proses dealkilasi toluena menggunakan Aspen HYSYS. Umpan ke reaktor harus mengandung toluena dan hidrogen, sedangkan kondisi operasi yang direkomendasikan adalah pada suhu 500 oC hingga 650 oC dan tekanan 20 hingga 40 atm untuk mencapai konversi 90%. Untuk tujuan ini, reaktor konversi telah dipilih sebagai tipe yang disukai. Hasil simulasi sangat berharga selama tahap awal perancangan fasilitas produksi benzene. Perhitungan neraca massa dan energi dapat dengan mudah dilakukan menggunakan Aspen HYSYS. Penelitian masa depan dapat fokus pada penyelidikan berbagai jenis reaktor sambil mempertimbangkan kinetika reaksi. Kata kunci: aspen HYSYS, hidrodealkilasi, simulasi, toluene

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Section: Introductionmentioning

confidence: 99%

Simulation of the Hydrodealkylation of Toluene Using Conversion Reactor

Agustriyanto,

Setyopratomo,

Mochni

et al. 2024

saintek

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“…Recently, it was also showed that reversing the external surface of ZSM-5 zeolite by positively charged hexadecyltrimethylammonium allowed for a selective deposition of phosphorus on the external surface and pore entrance, thus leading to improved paraselectivity in the alkylation of toluene with methanol . Additionally, chemical liquid deposition and chemical vapor deposition of tetraethyl orthosilicate (TEOS) have been successfully employed with the purpose of passivating surface acidity of zeolites. − …”

Section: Introductionmentioning

confidence: 99%

Passivated Surface of High Aluminum Containing ZSM-5 by Silicalite-1: Synthesis and Application in Dehydration Reaction

Giordano

Migliori

Ferrarelli

et al. 2022

ACS Sustainable Chem. Eng.

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Methanol dehydration reaction is an essential process to bridge the biomass conversion and chemicals. However, the undesired distribution of zeolite acidity hinders its excellent catalytic performance. In this work, the technique of passivating surface acidity of a high aluminum containing ZSM-5 zeolite by the growth of the silicalite-1 layer under hydrothermal conditions is presented. The samples passivated with a single-step or double-step silicalite-1 deposition were tested for the dehydration of methanol to dimethyl ether and compared to the parent ZSM-5 zeolite using a bench-scale packed bed reactor operated at 160−240 °C under atmospheric pressure. The formation of an amorphous silica layer determines the decrease of the accessible micropore surface determining the drop in conversion and selectivity of the catalyst with the passivating single-step silicalite-1 deposition with respect to the parent zeolite. In contrast, the catalyst with a double-step silicalite-1 deposition showed a conversion close to the parent ZSM-5 zeolite one but with an improved selectivity at high temperature, due to the low coke formation and retention in the highly porous structure.

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Unlocking Enhanced Butadiene Selectivity: The Crucial Role of Zeolite Channel Confinement in the Selective Decarbonylation of γ‐Valerolactone

Qiao,

Xiao,

Zhang

et al. 2024

ChemSusChem

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Herein, we report a highly selective production route for butadiene from γ‐valerolactone over zeolite catalysts. The catalytic performance of eight zeolites with different framework topologies were compared, revealing that zeolites with narrower 10‐membered ring channels exhibit enhanced selectivity of butadiene. Specifically, ZSM‐35 and ZSM‐22, featuring the narrowest 10‐membered ring channels, demonstrate the highest butadiene selectivity to 61% and 59%, respectively. Notably, surface passivation of ZSM‐35 leads to a remarkable increase in butadiene selectivity to 82%, maintaining a 99% conversion. Additionally, we propose a reaction network and identify cyclopentenone as a key intermediate in the transformation of γ‐valerolactone to butadiene. Both experimental and theoretical results conclude that confinement effect of 10‐membered ring channels improves the selectivity of butadiene.

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Ferrierite zeolite passivation and its catalytic application in toluene disproportionation

Cited by 7 publications

References 31 publications

Simulation of the Hydrodealkylation of Toluene Using Conversion Reactor

Simulation of the Hydrodealkylation of Toluene Using Conversion Reactor

Passivated Surface of High Aluminum Containing ZSM-5 by Silicalite-1: Synthesis and Application in Dehydration Reaction

Unlocking Enhanced Butadiene Selectivity: The Crucial Role of Zeolite Channel Confinement in the Selective Decarbonylation of γ‐Valerolactone

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