Improved ethylbenzene suppression and coke-resistance on benzene methylation over metals doped fibrous silica-HZSM-5 zeolite

Rahman, A.F.A.; Jalil, Aishah Abdul; Hamid, M.Y.S.; Hussain, I.; Hassan, N.S.; Khoja, Asif Hussain

doi:10.1016/j.mcat.2022.112370

Cited by 4 publications

(2 citation statements)

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“…25 The symmetric stretching vibration of Si-OH is observed at 960 cm −1 . 26 The absorption band at 1640 cm −1 is associated to the -OH absorbed on the silica gel surface, which is supported with the board peak at 3600-3400 cm −1 . 27 Increasing the volume of ethanol led to an increase in the intensity of the Si-O-H vibration at 960 cm −1 , demonstrating that the presence of ethanol promotes the hydrolysis process in the reaction.…”

Section: Resultsmentioning

confidence: 54%

Synthesis and characterization of silica gel from Lapindo volcanic mud with ethanol as a cosolvent for desiccant applications

et al. 2023

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Section: Resultsmentioning

confidence: 54%

Synthesis and characterization of silica gel from Lapindo volcanic mud with ethanol as a cosolvent for desiccant applications

et al. 2023

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“…A higher I G /I D ratio indicates a higher rate of graphitic carbon formation, which is a stable form of carbon deposits compared to very unstable and amorphous carbon. This led to the rapid deactivation of the catalyst and a tougher regeneration process (Rahman et al 2022). The calculated value of the I G /I D ratio for FSAPO-34 and SAPO-34 was found to be 0.68 and 0.82, respectively, which con rmed that the synthesized FSAPO-34 contained less graphitic carbon than SAPO-34 owing to its distinctive brous structure.…”

Section: Analysis Of Spent Catalystsmentioning

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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Brazilian clays as natural cation exchangers for copper sorption in a batch system

Ferreira,

da Costa,

Barbosa

et al. 2024

Adsorption

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Improved ethylbenzene suppression and coke-resistance on benzene methylation over metals doped fibrous silica-HZSM-5 zeolite

Cited by 4 publications

References 53 publications

Synthesis and characterization of silica gel from Lapindo volcanic mud with ethanol as a cosolvent for desiccant applications

Synthesis and characterization of silica gel from Lapindo volcanic mud with ethanol as a cosolvent for desiccant applications

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

Brazilian clays as natural cation exchangers for copper sorption in a batch system

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