Light cracked naphtha processing: Controlling chemistry for maximum propylene production

Corma, Avelino; Melo, Francisco Vicente Sales; Sauvanaud, Laurent; Ortega, Francisco

doi:10.1016/j.cattod.2005.07.109

Cited by 225 publications

(161 citation statements)

References 11 publications

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“…The naphtha stream can be reprocessed either in the same riser or in a parallel, dedicated riser, taking advantage of customized operating conditions. Studies in Riser Simulator [48], Microriser [37] and Microdowner [40][41] have been realized, giving similar results. As expected, olefins, especially longer olefins (7 or more carbons) are considerably reduced in the remaining gasoline.…”

Section: Naphtha Cracking and High Severity Crackingmentioning

confidence: 62%

“…On these items, MicroDowner unit was able to fit DCR data, working at same temperature, a similar (somewhat higher) catalyst to oil ratio and similar residence time in reactor. Other studies including naphtha cracking [40][41], use of coked catalyst [42] and cracking of oxygenated feeds [43] also have been carried out and will be further discussed below.…”

Section: Fixed Fluid Bed Solid Well Mixed Gas: Berty Type Reactors Rmentioning

confidence: 99%

“…Note that under FCC riser conditions, straight run naphtha, composed mainly of parrafins, will not crack significantly [41]. Higher temperature (above600ºC), much longer residence time (as in old fluid bed catalytic crackers) or large amounts of dedicated catalyst such as ZSM-5 will be necessary to achieve high LSR naphtha conversion.…”

Section: Naphtha Cracking and High Severity Crackingmentioning

confidence: 99%

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FCC testing at bench scale: New units, new processes, new feeds

Corma

Sauvanaud

2013

Catalysis Today

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As the FCC process has evolved over decades, several laboratory scale equipment have appeared to maintain a proper assessment of catalysts activity. Several laboratory equipments are available for simulating the FCC process, from the well known fixed bed, MicroActivity Test to newer, fluid bed or transported bed units. As well, a number of units have been created to simulate other parts of the process such as regenerator or stripper, The increased pressure for treating non-conventional feeds, from reprocessing gasoline to extra-heavy feeds or oils produced from biomass containing large amounts of heteroatoms, increase the needs to have a laboratory test which is as close as possible to the process so that data extraction from the laboratory test are simplified, thus less prone to errors or misunderstanding. KeywordsLaboratory testing, catalytic cracking, naphtha cracking, coked catalyst, biooil cracking Highlights• FCC process is adapting to new feeds and new processes• Heavy resid feeds and biomass-derived feeds are being extensively tested • Significant operation and process changes are contemplated to squeeze maximum value from feeds: naphtha reprocessing, use of partially coked catalysts, several independent risers. 3

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Section: Naphtha Cracking and High Severity Crackingmentioning

confidence: 62%

Section: Fixed Fluid Bed Solid Well Mixed Gas: Berty Type Reactors Rmentioning

confidence: 99%

Section: Naphtha Cracking and High Severity Crackingmentioning

confidence: 99%

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FCC testing at bench scale: New units, new processes, new feeds

Corma

Sauvanaud

2013

Catalysis Today

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“…They are namely bimolecular (classical) cracking which involves hydride transfer reactions [73] and monomolecular cracking which occur by formation of carbonium ions [74]. The monomolecular (non-classical) cracking proposed by Haag and Dessau [74] extensively occurs in medium pore shape selective zeolites (ZSM-5) [75][76][77] since bimolecular reaction intermediates cannot be formed in the narrow pores. However, both monomolecular and bimolecular cracking reactions occur in the Y-zeolite of the FCC catalyst due to its relatively large pore size [78].…”

Section: B432 Gas Analysismentioning

confidence: 99%

“…However, both monomolecular and bimolecular cracking reactions occur in the Y-zeolite of the FCC catalyst due to its relatively large pore size [78]. In short, the FCC catalyst catalyzes mainly cracking and hydrogen transfer reactions [40,77,[79][80][81][82] and the ZSM-5 additive promotes isomerization and shape selective cracking reactions [81].…”

Section: B432 Gas Analysismentioning

confidence: 99%