Influence of salt on nanozeolite-Y particles size synthesized under organic template-free condition

Radman, Hanin M.; Dabbawala, Aasif A.; Ismail, Issam; Wahedi, Yasser Al; Polychronopoulou, Kyriaki; Vaithilingam, Balasubramanian V.; Singaravel, Gnana; Morin, S.; Berthod, Mikaël; Alhassan, Saeed M.

doi:10.1016/j.micromeso.2019.03.015

Cited by 20 publications

(15 citation statements)

References 42 publications

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“…According to Fig. 4, the maximum amount adsorbed at saturation varies between 100 and 150 mg g -1 and it is obviously lower than the experimentally measured capacities of adsorption reported for zeolites or zeolite-like materials tested under harsher degassing conditions; e.g., 230 mg g -1 for synthetic nano-sized zeolites as a function of NaCl concentration after a thermal treatment at 200 °C [37], 400-600 mg g -1 at a p/p0 of 32% for mesoporous modified MIL-101 materials in presence of CaCl2 after a complete removal of water [8], as well as 240-600 mg g -1 in the case a series of different MOF structures after a desorption under vacuum [38]. Nevertheless, when the activation conditions are kept mild, the sorption performance of the present ionosilicas becomes comparable to those of 13X, LTA, mordenite or AlPO/SAPO frameworks [35,39,40].…”

Section: Adsorption Properties Of Ionosilica Samples Towards Water Vamentioning

confidence: 61%

Ionosilica-based anion exchangers for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation

Wu¹,

Hesemann²,

Trens³

et al. 2020

Chemical Engineering Journal

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Three ionosilica materials have been tested for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation. The previous synthesis procedures were adapted to prepare materials possessing an organosilica framework with silylated cationic blocs and Cl-, HSO4-, SO4 2anions in various proportions as extra-framework compensating counter-ions. Transmission and Scanning Electron Microscopy, Wavelength Dispersive X-Ray Fluorescence, Energy Dispersive X-ray Spectroscopy, Thermogravimetric analysis, adsorption of gaseous nitrogen at 77 K, 29 Si Solid-State Nuclear Magnetic Resonance spectroscopy were employed to establish the key characteristics of the three ionosilica samples in terms of elemental composition, particle morphology and textural properties, thermal stability and regenerability, or variability of surface activity during repeated hydrationdehydration cycles. Their capacity to adsorb water vapor at cool and moderate ambient temperatures after incomplete surface drying was demonstrated by means of the scanning microscopy operating in low-vacuum mode at 275 K, or more precisely by measuring the water adsorption isotherms at 313 K and the related differential heats under static conditions. Finally, flow calorimetry operating in the moist-gas flow mode was used to measure the integral heat accompanying the adsorption of water vapor at its partial pressure of 2.8 kPa and 296 K as well as the kinetics of heat release in three drying-saturation cycles. After a drying procedure carried out under helium flow at 353 K, the thermal performance of two ionosilica samples containing both HSO4and SO4 2counter-ions was sufficient enough to consider them as potential adsorbents for auxiliary space heating in homes, small businesses, or public buildings.

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Section: Adsorption Properties Of Ionosilica Samples Towards Water Vamentioning

confidence: 61%

Ionosilica-based anion exchangers for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation

Wu¹,

Hesemann²,

Trens³

et al. 2020

Chemical Engineering Journal

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“…24 Alhassan et al found that nanosized zeolite Y can be synthesized in the presence of alkali metal chloride salt. 25 Reinoso et al reported that nanocrystalline NaY zeolite was synthesized at low temperature via applying ultra-assisted aging. 26 Cardoso et al synthesized nanosized faujasite crystals with the SiO 2 /Al 2 O 3 ratio of 3.0 through a simple synthesis procedure.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and catalytic performance of a small crystal NaY zeolite with high SiO₂/Al₂O₃ ratio

Feng

Zhang

et al. 2019

RSC Adv.

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“…The Y zeolite has different applications in the petrochemical industry because of its characteristics . According to the literature, the activity of the nanocrystalline zeolites in the n ‐alkane isomerization is significantly higher when compared with a zeolite with micro‐sized crystals.…”

Section: Introductionmentioning

confidence: 99%

“…However, this synthesis method requires a calcination step to remove the template and a longer duration of time. By considering the industrial applications of Y zeolite catalysts, it seems that the synthesis of this zeolite without organic template can be economically important …”

Section: Introductionmentioning

confidence: 99%

Effect of phosphomolybdic acid on the catalytic behavior of bifunctional Pt‐Cr/nanocrystalline Y zeolite in hydroisomerization of n‐octane

Afzali

Vaezi

Aghabarari

et al. 2019

J Chinese Chemical Soc

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In this study, Y zeolite nanocrystals were synthesized without an organic template and were used as a support for bifunctional nanocatalysts in the hydroisomerization of n‐octane. Different types of catalysts were synthesized by loading Pt, Cr, and phosphomolybdic acid (HPMo) on Y zeolite nanocrystal supports and were characterized by X‐ray diffraction (XRD), Brunauer–Emmett–Teller (BET), field emission scanning electron microscope (FE‐SEM), and transmission electron microscope (TEM) analysis. The Cr‐Pt/HPMo‐Y nanocatalyst with a surface area of approx. 600 m2/g showed the best performance in the hydroisomerization of n‐octane. The optimization of n‐octane hydroisomerization over bifunctional nanocatalysts supported on nanocrystalline Y zeolite, in the presence of H2 gas, was applied based on the response surface methodology (RSM) and Box–Behnken design (BBD) template. The effect of three different process variables on the yield of iso‐alkanes as the purpose process was determined. Experiments were carried out using a fixed‐bed microreactor under different ranges of weight hourly space velocity (WHSV) (A = 0.5–1.5 hr−1), H2 to n‐C8 molar ratio (B = 1:1–3:1), and reaction temperature (C = 200–300°C). The RSM proved that the temperature variable had the greatest impact on the hydroisomerization reaction yield.

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Influence of salt on nanozeolite-Y particles size synthesized under organic template-free condition

Cited by 20 publications

References 42 publications

Ionosilica-based anion exchangers for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation

Ionosilica-based anion exchangers for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation

Synthesis and catalytic performance of a small crystal NaY zeolite with high SiO₂/Al₂O₃ ratio

Effect of phosphomolybdic acid on the catalytic behavior of bifunctional Pt‐Cr/nanocrystalline Y zeolite in hydroisomerization of n‐octane

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Influence of salt on nanozeolite-Y particles size synthesized under organic template-free condition

Cited by 20 publications

References 42 publications

Ionosilica-based anion exchangers for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation

Ionosilica-based anion exchangers for low-temperature thermochemical storage of energy under mild conditions of adsorbent regeneration and saturation

Synthesis and catalytic performance of a small crystal NaY zeolite with high SiO2/Al2O3 ratio

Effect of phosphomolybdic acid on the catalytic behavior of bifunctional Pt‐Cr/nanocrystalline Y zeolite in hydroisomerization of n‐octane

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Synthesis and catalytic performance of a small crystal NaY zeolite with high SiO₂/Al₂O₃ ratio