n-Hexane hydroisomerization over Zr-modified bicontinuous lamellar silica mordenite supported Pt as highly selective catalyst: Molecular hydrogen generated protonic acid sites and optimization

Ibrahim, Mastura; Jalil, Aishah Abdul; Zakaria, W.; Fatah, N.A.A.; Hamid, M.Y.S.; Izan, S.M.; Setiabudi, Herma Dina

doi:10.1016/j.ijhydene.2020.11.006

Cited by 12 publications

(4 citation statements)

References 62 publications

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“…These signals are more intense in the composite obtained under optimal conditions, confirming a higher amount of BiOI over this composite sample. In addition, typical bands associated with mordenite zeolite are located at 808, 960 cm −1 and in the range between 1206 and 1869 cm −1 , corresponding to the fundamental vibrations of the tetrahedral bonds of (Al, Si) O 4 [ 58 , 59 , 60 ]. Furthermore, stretching signal vibrations associated with silanol groups (Si-O-H) are registered around 3668 cm −1 [ 61 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater

et al. 2022

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Recently, bismuth oxyiodide (BiOI) is an attractive semiconductor to use in heterogeneous photocatalysis processes. Unfortunately, BiOI individually shows limited photocatalytic efficiency, instability, and a quick recombination of electron/holes. Considering the practical application of this semiconductor, some studies show that synthetic zeolites provide good support for this photocatalyst. This support material permits a better photocatalytic efficiency because it prevents the quick recombination of photogenerated pairs. However, the optimal conditions (time and temperature) to obtain composites (BiOI/ synthetic zeolite) with high photocatalytic efficiency using a coprecipitation-solvothermal growth method have not yet been reported. In this study, a response surface methodology (RSM) based on a central composite design (CCD) was applied to optimize the synthesis conditions of BiOI/mordenite composites. For this purpose, eleven BiOI/mordenite composites were synthesized using a combined coprecipitation-solvothermal method under different time and temperature conditions. The photocatalytic activities of the synthesized composites were evaluated after 20 min of photocatalytic oxidation of caffeic acid, a typical organic pollutant found in agro-industrial wastewater. Moreover, BiOI/mordenite composites with the highest and lowest photocatalytic activity were physically and chemically characterized using nitrogen adsorption isotherms, scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and diffuse reflectance spectroscopy (DRS). The optimal synthesis conditions prove to be 187 °C and 9 h. In addition, the changes applied to the experimental conditions led to surface property modifications that influenced the photocatalytic degradation efficiency of the BiOI/mordenite composite toward caffeic acid photodegradation.

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Section: Resultsmentioning

confidence: 99%

Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater

et al. 2022

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“…[2] So far, numerous studies on different types of zeolites such as MFI zeolites, SBA-15, MCM-41, SAPO and MCM-48, H-β, faujasite, offretite, and mordenite zeolites have been conducted. [1,2,10,13] Among the zeolite family, the HZSM5 catalyst has shown superior performance due to its excellent shape selectivity, tunable acidity (Brönsted and Lewis), and pore size (0.55 nm). [5,10] However, the major challenges faced by the HZSM5 are selectivity and catalyst deactivation.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…There is a small class of catalysts for which the spillover phenomena have been reported, namely zeolite on metal, [10] zeolite doped with metal‐silica, [11] and zirconia‐based acid catalysts, [12] [13] . Previously, we reported the hydrogen spillover phenomenon on modified ZrO 2 ‐supported Pt, [13] Pt−Pd/C coupled catalyst, [14] Pt and MoO 3 , [15] and Zr‐loaded silica [16] catalysts. In general, the proposed mechanism for the active protonic acid site formation by the hydrogen spillover is essentially the same for all catalysts, nonetheless, there are variances among the catalysts.…”

Section: Introductionmentioning

confidence: 99%

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Role of Iridium in n‐Pentane Isomerization, Cyclohexane Ring Opening, and Cumene Cracking Over Ir/Pt‐HZSM5

Setiabudi,

Abdulkadir,

Jalil

2024

ChemistrySelect

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Producing aromatic compounds sustainably from renewable sources is essential to reduce reliance on fossil fuels. This study aims to elucidate the multifunctional behavior of Ir on Pt‐HZSM5, and their influence on the catalytic activity of n‐pentane isomerization, cyclohexane ring opening, and cumene cracking. The results showed that Ir created another active and Lewis's acid site, which increased the acid sites (H+), thus enhancing the catalytic performance of Pt‐HZSM5. Moreover, Ir inhibited the atomic hydrogen bonding interaction and hence improved the main reaction and suppressed the side reaction. Therefore, the mechanism of the main reaction over Ir/Pt‐HZSM5 can be described as the following steps: (i) Interaction of reactant with H+; (ii) Reaction of carbenium ion intermediate; and (iii) Interaction of a carbenium ion intermediate with H−, followed by desorption. This study provides a comprehensive understanding of the intricate catalytic pathways, offering insights into the design of efficient multifunctional catalysts for various petrochemical applications.

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Fe-Ni bimetallic supported on mordenite catalyst for selective oxidation of veratryl alcohol in a continuous reactor

Gayathri,

Tamizhdurai,

Kavitha

et al. 2024

Arabian Journal of Chemistry

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n-Hexane hydroisomerization over Zr-modified bicontinuous lamellar silica mordenite supported Pt as highly selective catalyst: Molecular hydrogen generated protonic acid sites and optimization

Cited by 12 publications

References 62 publications

Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater

Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater

Role of Iridium in n‐Pentane Isomerization, Cyclohexane Ring Opening, and Cumene Cracking Over Ir/Pt‐HZSM5

Fe-Ni bimetallic supported on mordenite catalyst for selective oxidation of veratryl alcohol in a continuous reactor

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