Propylene aromatization on Ga-MFI Zeolites

Park, Jinu; Lee, Jun Young; Hahm, Hyun-Sik

doi:10.1007/bf02697148

Cited by 9 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 which demonstrated their lattice structures. From our previous studies, there were slight decreases in the intensities of characteristic diffraction peaks as metal dosage on ZSM-5 increased because of metal deposition on zeolite pores and surface [32][33][34][35]. The surface metal modification did not affect catalysts' crystallinity as there was no collapse or alteration of structure [8,[32][33][34][35].…”

Section: Resultsmentioning

confidence: 98%

See 1 more Smart Citation

Improved aromatic yield and toluene selectivity in propane aromatization over Zn–Co/ZSM-5: effect of metal composition and process conditions

et al. 2022

View full text Add to dashboard Cite

In this report, a catalytic enhanced-conventional process production background was employed to determine the most cost-effective and environmentally friendly techniques to improve the catalytic production of toluene and other aromatic compounds from propane aromatization. 2 wt% of zinc was co-impregnated with 1-3 wt% of cobalt on HZSM-5. Characterizations and analysis showed that catalysts are crystalline and microporous. Propane conversion was carried out at 540 °C, 1200 ml/g-h gas hourly space velocity and atmospheric pressure over Zn-Co/ZSM-5 bimetallic catalysts. Toluene selectivity in the aromatic products was greatly improved and sustained significantly together with other aromatic products. Catalytic conversion of propane and aromatic yield over Zn-Co/ZSM-5 was improved and stabilized due to metallic collaboration on HZSM-5. Aromatic yield averaged 46, 32, and 36%, respectively, for 1-3 wt% Co in Zn-Co/ ZSM-5 bimetallic catalyst. Average toluene selectivity in the aromatic products for 12 h time on stream from 60, 50 and 51% for 1-3 wt% Co loading. The threshold loading of cobalt with zinc was 2% above which the general aromatic selectivity declined. A decrease in conversion from 73 to 15% was observed for flowrate increase from 6 to 35 ml min −1 and an increase in aromatic selectivity from 80 to 87%. An increase in temperature of 500-560 °C increased catalytic performance, 32-47% for propane conver-sion, and 79-86% aromatic selectivity. KeywordsPropane conversion • Aromatic yield • Toluene selectivity • Zn-Co/ZSM-5 Abbreviations BET Brunauer-Emmett-Teller BTEX Benzene toluene ethylbenzene xylene FTIR Fourier transform infra-red H 2 -TPR Hydrogen-temperature programming reduction SEM Scanning slmctron microscopy TEM Transmission electron microscopy XPS X-ray photoelectron spectroscopy XRD X-ray diffraction XRF X-ray fluorescence * G. G. Oseke

show abstract

Section: Resultsmentioning

confidence: 98%

“…[1,2] Styrene, linear alkyl benzene, and cumene are serves as the foremost consumer of benzene. These are largely in demand, making aromatic compound production to have and still attracting attention both in academic and industrial research [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Improved aromatic yield and toluene selectivity in propane aromatization over Zn–Co/ZSM-5: effect of metal composition and process conditions

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The PR aromatization reactions with various catalysts are explained in some literature. 25,26 They have stated that PR can be converted to aromatic compounds such as BZ and TL during a catalytic aromatization reaction. Considering the operating conditions and information published in the literature, the reactions occurring in this process are listed in Table 1.…”

Section: Experimental and Methodsmentioning

confidence: 99%

“…Oligomer formation by cyclotrimerization reactions, cocyclotrimerization of alkynes and alkaldienes, has been extensively discussed. , In the given reports, a large number of cyclic and aromatic compounds such as BZ and TL can be formed during consecutive complex oligomerization reactions from BD, MA, and PD. The PR aromatization reactions with various catalysts are explained in some literature. , They have stated that PR can be converted to aromatic compounds such as BZ and TL during a catalytic aromatization reaction. Considering the operating conditions and information published in the literature, the reactions occurring in this process are listed in Table .…”

Section: Experimental and Methodsmentioning

confidence: 99%

Estimation of Kinetic Parameters and Simulation of Methylacetylene and Propadiene Liquid-Phase Selective Hydrogenation Reactor Considering the Catalyst Deactivation

Ghasemigoudarzi

Hojjati

Omidkhah

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

This paper presents a kinetic study of methylacetylene (MA) and propadiene (PD) liquid-phase selective hydrogenation considering catalyst deactivation. For this purpose, more than 20 000 plant operational data points were collected from two different fixed-bed reactors in an olefin plant during a 14-month run-step. Four different kinetic models were used parametrically in a dynamic reactor simulation. The genetic algorithm (GA) technique was used to estimate the kinetic constant by minimization of the mean relative error (MRE) between the simulation results and plant data. The effects of T inlet , WHSV, H 2 / MAPD, and catalyst deactivation on the reactor performance, propylene (PR) selectivity, PR yield, and other undesired products such as benzene (BZ) and toluene (TL) have been investigated. The average MRE of the reactor temperature, species molar flow, and reactor pressure drop is 3.46, 5.9, and 4.86%, respectively, indicating that the Langmuir−Hinshelwood−Hougen−Watson (LH-HW) type model with hydrogen dissociation fit the experimental data with acceptable accuracy.

show abstract

“…At 773 K, 1 bar, 10 vol % ethene, 3.75 h −1 , Ga addition to ZSM‐5 improved aromatic selectivity from 12 to 80 %, with a simultaneous decrease in catalytic stability 35. Under similar temperature and pressure conditions, Ga‐promoted catalyst improved the aromatic selectivity from 44 % to 65 % at 773 K and 4.5 h −1 when using non‐diluted propene 40.…”

Section: Introductionmentioning

confidence: 94%

Advantages of Producing Aromatics from Propene over Ethene Using Zeolite‐Based Catalysts

Butolia

Winkelman

et al. 2022

Chemie Ingenieur Technik

View full text Add to dashboard Cite

Sustainable production of aromatics, especially benzene, toluene and xylenes (BTX), is essential considering their broad applications and the current global transition away from crude oil utilization. Aromatization of lower olefins, particularly ethene and propene, offers great potential if they are derived from more circular alternative carbon feedstocks such as biomass and waste plastics. This work aims to identify the preferred olefin feed, ethene or propene, for BTX production in a fixed-bed reactor. A commercial H-ZSM-5 (Si/Al = 23) catalyst was used as a reference catalyst, as well as a Ga-ZSM-5 catalyst, prepared by Ga ion-exchange of the H-ZSM-5 catalyst. At 773 K, 1 bar, 45 vol % olefin, 6.75 h -1 , propene aromatization over the Ga-ZSM-5 catalyst exhibited higher BTX selectivity of 55 % and resulted in slower catalyst deactivation compared to ethene aromatization.

show abstract

Propylene aromatization on Ga-MFI Zeolites

Cited by 9 publications

References 12 publications

Improved aromatic yield and toluene selectivity in propane aromatization over Zn–Co/ZSM-5: effect of metal composition and process conditions

Improved aromatic yield and toluene selectivity in propane aromatization over Zn–Co/ZSM-5: effect of metal composition and process conditions

Estimation of Kinetic Parameters and Simulation of Methylacetylene and Propadiene Liquid-Phase Selective Hydrogenation Reactor Considering the Catalyst Deactivation

Advantages of Producing Aromatics from Propene over Ethene Using Zeolite‐Based Catalysts

Contact Info

Product

Resources

About