The chemistry of olefins production by ZSM-5 addition to catalytic cracking units

Buchanan, J. Scott

doi:10.1016/s0920-5861(99)00248-5

Cited by 113 publications

(91 citation statements)

References 5 publications

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“…The optimum catalyst system will maximize both propylene selectivity and gasoline olefinicity, while minimizing hydrogen transfer, isomerization, oligomerization and aromatization reactions. For the purpose of producing more propylene and olefins, more ZSM-5 is being used as the main active component of the catalyst in the FCC unit [2,11,19,33,108].…”

Section: Zsm-5 Additive For Olefin Production a Effect Of Zsm-5 Amountmentioning

confidence: 99%

Maximizing propylene production via FCC technology

2015

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This review looks at the main processes available for the production of light olefins with a focus on maximizing the production of propylene. Maximization of propylene production has become the focus of most refineries because it is in high demand and there is a supply shortage from modern steam crackers, which now produce relatively less propylene. The flexibility of the fluid catalytic cracking (FCC) to various reaction conditions makes it possible as one of the means to close the gap between supply and demand. The appropriate modification of the FCC process is accomplished by the synergistic integration of the catalyst, temperature, reaction-residence time, coke make, and hydrocarbon partial pressure. The main constraints for maximum propylene yield are based on having a suitable catalyst, suitable reactor configuration and reaction conditions.

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Section: Zsm-5 Additive For Olefin Production a Effect Of Zsm-5 Amountmentioning

confidence: 99%

Maximizing propylene production via FCC technology

2015

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“…The pristine MFI zeolite pattern, prepared without biomass-derivate compounds (Refs. [1,2]) were included. Firstly, it is important to highlight that all materials exhibited all the characteristic diffraction lines of a unique MFI structure ( Figure 1).…”

Section: Resultsmentioning

confidence: 99%

“…For instance, its use can lead to improved gasoline quality in fluid catalytic cracking processes [1]. Ethylene and propylene selectivity can also be improved based on ZSM-5 additives [2]. Likewise this zeolite has been successfully tested in NO x reduction [3], glycerol conversion [3,4] and in the Methanol-To-Olefins process [5].…”

Section: Introductionmentioning

confidence: 99%

Insights to Achieve a Better Control of Silicon-Aluminum Ratio and ZSM-5 Zeolite Crystal Morphology through the Assistance of Biomass

et al. 2016

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Abstract:The present study attempts to provide insights for both the chemical composition (Si/Al) and the crystal morphology of ZSM-5 zeolites while using biomass template compounds in the synthesis. The solution containing biomass-derivative compounds was obtained after treating biomass in a sodium hydroxide aqueous solution under reflux. The latter alkaline solution was used as a solvent for zeolite nuclei ingredients to form the gel phase under hydrothermal conditions (170˝C during 24, 48 or 72 h). This approach allowed for preparing MFI zeolites having a broad range of Si/Al ratio, i.e., from 25 to 150. Likewise, MFI crystals with different morphologies could be obtained, being different from the pristine zeolite formed in the absence of biomass.

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“…More than 30 % of the worldwide propylene production is from FCC units and this figure will continue to increase [8]. To enhance the propylene yield of FCC units, ZSM-5 zeolite has been used as an additive in industrial practice since its first commercial use in 1983 [9][10][11][12][13][14][15]. Because of its unique pore structure, ZSM-5 zeolite can crack selectively gasolinerange linear or mono-branched hydrocarbons to C3-C4 olefins.…”

Section: Introductionmentioning

confidence: 99%

“…Because of its unique pore structure, ZSM-5 zeolite can crack selectively gasolinerange linear or mono-branched hydrocarbons to C3-C4 olefins. And its moderate acidity can largely suppress hydrogen-transfer reactions [10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZSM-5 zeolite from diatomite for fluid catalytic cracking (FCC) application

et al. 2015

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In this study, ZSM-5 zeolite was successfully synthesized hydrothermally from cheap and easily accessible natural mineral diatomite in the presence of tetrapropyl ammonium bromide. The pore structure, acidic sites and surface features of as-synthesized ZSM-5 zeolite were well characterized by X-ray diffraction, scanning electron microscopy, pyridine-adsorbed Fourier transform infrared spectroscopy, and N 2 adsorption. The analysis results revealed that the as-synthesized ZSM-5 zeolite exhibited excellent hydrothermal stability, high specific surface area (223 m 2 g -1 ) and more acidic cites than diatomite. After mixing ZSM-5 zeolite with a FCC base catalyst, the catalytic performance was evaluated in a micro-fixed bed reactor using vacuum gas oil (VGO) as feedstock. The high surface area and more acidic sites of as-synthesized ZSM-5 zeolite played an important role in the production of light olefins (propylene and butylene) during catalytic cracking of VGO.

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The chemistry of olefins production by ZSM-5 addition to catalytic cracking units

Cited by 113 publications

References 5 publications

Maximizing propylene production via FCC technology

Maximizing propylene production via FCC technology

Insights to Achieve a Better Control of Silicon-Aluminum Ratio and ZSM-5 Zeolite Crystal Morphology through the Assistance of Biomass

Synthesis of ZSM-5 zeolite from diatomite for fluid catalytic cracking (FCC) application

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