Studies on acidity and activity of kaolin-supported Ag-doped HZSM–5 in methanol to olefins process

Lal, B.; Pal, Dan Bahadur; Rathoure, Amit Kumar; Singh, Arvind

doi:10.1007/s13399-021-01666-9

Cited by 3 publications

(3 citation statements)

References 54 publications

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“…Conventionally, light ole ns are primarily generated through the thermal cracking of crude oil and naphtha as a feedstock (Chen et al, 2023). This thermal cracking process typically involves high operating temperatures, necessitating a substantial amount of energy, leading to signi cant emissions of CO 2 and CO (Ren et al 2006;Sadrameli 2016;Lal et al 2021). In addition, the depleting availability of reserves and the increasing costs of crude oil reduce the viability of this process (Liu et al 2017;Sun et al 2020;Lal et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Enhanced coke resistance in methanol to olefins reaction via surplus mesoporosity of fibrous silica-wrapped SAPO-34

Sofi,

Hamid,

Jalil

et al. 2024

Preprint

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Growing concerns regarding the depletion of petroleum reserves and energy demand necessitate the exploration of alternative methods, such as methanol-to-olefin (MTO), to generate light olefins from non-crude oil sources. However, the industrial application of this method is limited due to the rapid deactivation of the catalyst, which is caused by the microporosity of the commercial catalyst. Here, we synthesized the fibrous silica-wrapped silico-alumino-phosphate (FSAPO-34) using a microemulsion technique with a seed-assisted synthesis method and applied it for the first time in the MTO reaction. The physicochemical properties of the fresh and spent catalysts were characterized by X-ray diffractometer, Fourier transform infrared spectroscopy-potassium bromide, N2 physisorption, field emission scanning electron microscopy, transmission electron microscopy, NH3 temperature-programmed desorption, thermal gravimetric analysis, O2 temperature-programmed oxidation, and Raman spectroscopy. The findings indicated that the formation of fibrous silica on the surface of SAPO-34 exhibited a unique spherical morphology with dendrimeric silica fiber, significantly enhancing the mesoporosity from 0.098 to 1.749 cm³/g compared to commercial microporous SAPO-34. FSAPO-34 demonstrates a significant improvement in catalytic lifetime, with a 54% increase, from 19.2 hours to 29.5 hours, compared to commercial SAPO-34. This enhanced stability is attributed to the introduction of mesoporosity in FSAPO-34, which, in turn, provides high accessibility and reduced diffusion resistance of products and ultimately retarded the formation of coke.

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Section: Introductionmentioning

confidence: 99%

Enhanced coke resistance in methanol to olefins reaction via surplus mesoporosity of fibrous silica-wrapped SAPO-34

Sofi,

Hamid,

Jalil

et al. 2024

Preprint

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“…As we all know, the evolution of light olefin industry is one of the key indicators to assess a country‘s economic power, and also plays an important role in national economic development [1,2] . Light olefins are primarily produced by hot steam cracking of light naphtha above 1073 K, which is a pyrolysis process and high energy consumption, leading to an increase in carbon dioxide emissions eventually [3–5] . The methanol to olefin (MTO) catalytic reaction, which offers an alternative platform for the production of basic petrochemicals from nonoil resources under atmospheric pressure, and is believed to be a more green and environmentally friendly method, making it an interesting and important reaction in both industry and academic area [6,7] …”

Section: Introductionmentioning

confidence: 99%

“…[1,2] Light olefins are primarily produced by hot steam cracking of light naphtha above 1073 K, which is a pyrolysis process and high energy consumption, leading to an increase in carbon dioxide emissions eventually. [3][4][5] The methanol to olefin (MTO) catalytic reaction, which offers an alternative platform for the production of basic petrochemicals from nonoil resources under atmospheric pressure, and is believed to be a more green and environmentally friendly method, making it an interesting and important reaction in both industry and academic area. [6,7] At present, acidic zeolite has been extensively used in petrochemical and oil refining processes, as well as in the production of light olefins.…”

Section: Introductionmentioning

confidence: 99%

One‐pot Synthesis of Phosphorus‐modified ZSM‐5 Zeolite by Solid‐state Method and its MTO Catalytic Performance

Zhou

Wang

et al. 2023

Chemistry A European J

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The traditional hydrothermal synthesis strategy of ZSM-5 zeolite is energy-consumption accompanying by pollution issues. Herein, phosphorus-modified layered ZSM-5 zeolites (PZ) were obtained by one-pot synthesis under solvent-free conditions. The synthesized samples were fully characterized by XRD, SEM, BET, NH 3 -TPD and FTIR. The effect of phosphorus addition on the morphology and catalytic activity of ZSM-5 was investigated. The results showed that phosphorus-modified ZSM-5 zeolites exhibited higher light olefin (ethylene and propylene) selectivity (above 50 %) and longer catalytic lifetime (33 h) in methanol to olefin (MTO) reaction when the weight hourly space velocity was 4 h À 1 . Phosphorus-modified ZSM-5 zeolite synthesized by in situ solvent-free method, which not only reduced the discharge of sewage but also showed a simple method to realize the introduction of phosphorous species, which provided a new idea for phosphorus modification of ZSM-5 zeolite.

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Recent Advancements of SAPO-34 and ZSM-5 Zeolite in Converting Methanol to Olefin: A Review

Sofi,

Hamid,

Jalil

et al. 2024

Arab J Sci Eng

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Studies on acidity and activity of kaolin-supported Ag-doped HZSM–5 in methanol to olefins process

Cited by 3 publications

References 54 publications

Enhanced coke resistance in methanol to olefins reaction via surplus mesoporosity of fibrous silica-wrapped SAPO-34

Enhanced coke resistance in methanol to olefins reaction via surplus mesoporosity of fibrous silica-wrapped SAPO-34

One‐pot Synthesis of Phosphorus‐modified ZSM‐5 Zeolite by Solid‐state Method and its MTO Catalytic Performance

Recent Advancements of SAPO-34 and ZSM-5 Zeolite in Converting Methanol to Olefin: A Review

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