Effect of zeolite structure and addition of steam on naphtha catalytic cracking to improve olefin production

Al-Shafei, Emad N.; Albahar, Mohammed Z.; Aljishi, Mohammad F.; Aljishi, Ali N.; Nasser, Galal A.; Muraza, Oki; Alnasir, Ali S.; Alasseel, Ahmed

doi:10.1016/j.fuel.2022.124089

Cited by 22 publications

(10 citation statements)

References 31 publications

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“…The introduction of zeolite in steam cracking obviously reduced the reaction temperature, and SCC over zeolite also showed an advantage of coke reduction with a steam/naphtha in the range of 0.5−1. 96 But under this condition, the combined effect of steam and high temperature would cause irreversible dealuminization and deactivation of zeolite. 97 It is also worth noting that similar deactivation of zeolite occurs not only during cracking but also in catalyst regeneration.…”

Section: ■ Optimized Conditions Of Operationmentioning

confidence: 99%

“…Researchers have also put great effort into applying zeolite in the SCC of naphtha. The introduction of zeolite in steam cracking obviously reduced the reaction temperature, and SCC over zeolite also showed an advantage of coke reduction with a steam/naphtha in the range of 0.5–1 . But under this condition, the combined effect of steam and high temperature would cause irreversible dealuminization and deactivation of zeolite .…”

Section: Processes and Technologies Of Catalytic Cracking Over Basic ...mentioning

confidence: 99%

“…Also, P-modification could decrease the catalytic activity of zeolite . Furthermore, the formation of LPGs and BTXs is enhanced during SCC over P-modified zeolite and zeolite with different porous structure. , Therefore, it is difficult to apply zeolite in the steam cracking of naphtha for light olefin production effectively and commercially.…”

Section: Processes and Technologies Of Catalytic Cracking Over Basic ...mentioning

confidence: 99%

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Research Progress of Basic Catalyst Used in Catalytic Cracking for Olefin Production and Heavy Oil Utilization

Gao

Zhang

Zhao

et al. 2023

Ind. Eng. Chem. Res.

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As the demand for light olefins increases and the oil becomes heavier, higher requirements for catalytic activity, anticoking performance, and stability of catalyst have been brought forward. Basic catalyst has attracted much more attention in recent years due to its excellent performance in heavy oil utilization. This review highlights the research progress of catalytic cracking over basic catalyst for olefin production and heavy oil utilization. The catalytic mechanism along with attractive functions of basic catalyst are summarized. The optimized condition of operation is discussed as well. Several processes and technologies of catalytic cracking over basic catalyst are introduced to advance future development. This review attempts to benefit new researchers in this field by helping them to understand basic-catalyzed cracking characteristics for preparing a suitable catalyst.

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Section: ■ Optimized Conditions Of Operationmentioning

confidence: 99%

Section: Processes and Technologies Of Catalytic Cracking Over Basic ...mentioning

confidence: 99%

Section: Processes and Technologies Of Catalytic Cracking Over Basic ...mentioning

confidence: 99%

See 1 more Smart Citation

Research Progress of Basic Catalyst Used in Catalytic Cracking for Olefin Production and Heavy Oil Utilization

Gao

Zhang

Zhao

et al. 2023

Ind. Eng. Chem. Res.

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“…6 Several zeolite catalysts, with well-dened microporous channel structures consisting of Si-Al oxides, are applied in different major hydrocarbon conversion processes in the petrochemical and rening industry. 7 Their unique properties, such as hydrothermal stability and strong acidity, allow them to be used in many shape selective reactions. 8,9 However, the main challenge with the application of zeolites in rening and petrochemical processes is the formation of coke due to the blockage of pores by bulky molecules, which increases the deactivation rate of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Catalytic conversion of heavy naphtha to reformate over the phosphorus-ZSM-5 catalyst at a lower reforming temperature

et al. 2022

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“…highlighted the importance of zeolite catalysts to the development of catalytic cracking technology. Detailed information about hydrocarbon behavior over zeolite catalysts is crucial to the precise design and optimization of the cracking process [12–15] …”

Section: Introductionmentioning

confidence: 99%

Roles of Molecular Structure in the Catalytic Cracking of n‐Heptane, Methylcyclohexane and Cyclopentene over HZSM‐5 Zeolites

Qiao

Hou

et al. 2022

ChemistrySelect

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Catalytic cracking technology is an important candidate for the crude‐to‐chemicals, which is promising to convert oil into chemicals by a clean and efficient way. n‐Heptane, methylcyclohexane and cyclopentene catalytic cracking over HZSM‐5 zeolites were studied at 320–550 °C under atmosphere, and a particular attention was paid to the effects of reaction temperature and time on stream. The cracked gas was analyzed by an online gas chromatograph, and the spent HZSM‐5 zeolites were characterized by TG, N2 physisorption and NH3‐TPD. It provided detailed information about the conversion, product distribution, coke formation and catalyst deactivation. Furthermore, the roles of molecular structure in the reaction network were discussed based on the carbenium ion mechanism. It was found that the protolytic cracking and hydride transfer was favored by n‐heptane due to the linear structure; the demethylation, protolytic ring‐opening and protolytic dehydrogenation was favored by methylcyclohexane due to the methyl group and cyclic structure; the protonation and oligomerization was favored by cyclopentene due to the cyclic and C=C structure. This made a significant difference on the catalytic performance: The activity was in a descending order of n‐heptane≈cyclopentene>methylcyclohexane. Alkane formation was in a descending order of n‐heptane>methylcyclohexane>cyclopentene. Aromatic and coke formation were in a descending order of cyclopentene>methylcyclohexane>n‐heptane.

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Effect of zeolite structure and addition of steam on naphtha catalytic cracking to improve olefin production

Cited by 22 publications

References 31 publications

Research Progress of Basic Catalyst Used in Catalytic Cracking for Olefin Production and Heavy Oil Utilization

Research Progress of Basic Catalyst Used in Catalytic Cracking for Olefin Production and Heavy Oil Utilization

Catalytic conversion of heavy naphtha to reformate over the phosphorus-ZSM-5 catalyst at a lower reforming temperature

Roles of Molecular Structure in the Catalytic Cracking of n‐Heptane, Methylcyclohexane and Cyclopentene over HZSM‐5 Zeolites

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