The universal zeolite ZSM-5: Structure and synthesis strategies. A review

Bensafi, Boumediéne; Chouat, Nadjat; Djafri, Fatiha

doi:10.1016/j.ccr.2023.215397

Cited by 26 publications

(10 citation statements)

References 193 publications

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“…The adsorption method in the case of ZSM-5 involved a similar mechanism to that of SiO 2 , with SO 2 being adsorbed both through physisorption and chemisorption by hydrogen bonding to hydroxyl groups [67]. Physical adsorption was possible due to the ZSM-5 structure, featuring straight linked channels, in which the active centers adsorb one or more gas molecules per situ, the adsorption position being non-parallel [68].…”

Section: Validation Of Nitric Oxide Absorption Capacity Through Compo...mentioning

confidence: 99%

A Study on the Ability of Nanomaterials to Adsorb NO and SO2 from Combustion Gases and the Effectiveness of Their Separation

Constantinescu,

Bucura,

Roman

et al. 2024

Nanomaterials

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Climate neutrality for the year 2050 is the goal assumed at the level of the EU27+UK. As Romania is no exception, it has assumed the gradual mitigation of pollution generated by the energy sector, and by 2030, according to ‘Fit for 55’, the share of energy from renewable sources must reach 42.5% from total energy consumption. For the rest of the energy produced from traditional sources, natural gas and/or coal, modern technologies will be used to retain the gaseous noxes. Even if they are not greenhouse gases, NO and SO2, generated from fossil fuel combustion, cause negative effects on the environment and biodiversity. The adsorption capacity of different materials, three nanomaterials developed in-house and three commercial adsorbents, both for NO and SO2, was tackled through gas chromatography, elemental analysis, and Fourier-transform infrared spectroscopy. Fe-BTC has proven to be an excellent material for separation efficiency and adsorption capacity under studied conditions, and is shown to be versatile both in the case of NO (80.00 cm3/g) and SO2 (63.07 cm3/g). All the developed nanomaterials generated superior results in comparison to the commercial adsorbents. The increase in pressure enhanced the performance of the absorption process, while temperature showed an opposite influence, by blocking the active centers on the surface.

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Section: Validation Of Nitric Oxide Absorption Capacity Through Compo...mentioning

confidence: 99%

A Study on the Ability of Nanomaterials to Adsorb NO and SO2 from Combustion Gases and the Effectiveness of Their Separation

Constantinescu,

Bucura,

Roman

et al. 2024

Nanomaterials

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“…Natural zeolite is negatively charged, which is due to isomorphic substitution. The replacement of one atom by another of the same size in the crystal lattice without disturbing or changing the structure of the mineral crystals [33]. In this way, the negative charges neutralize the cations in a solution, which eventually deposit on the surface of the adsorbent.…”

Section: Effect Of Adsorbent Dosesmentioning

confidence: 99%

Heat-Treated Zeolite as Effective Adsorbent for Final Treatment of Palm Oil Mill Effluent

Norhafiza Ilyana Yatim,

Nur Aini Ishak,

Nurul Aqilah Mohamad

et al. 2023

ARFMTS

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Malaysia is known for its high oil palm production, which results in a significant amount of palm oil mill effluent (POME). Improper treatment or direct discharge of untreated POME can have significant impacts on water pollution. The objective of this study was to investigate the potential of zeolite as an adsorbent for the efficient treatment of POME. The initial physical and chemical properties of POME, sourced from the aerobic pond of a local palm oil mill in Terengganu, were determined before conducting two series of experiments using adsorption methods. In the first series of experiments, natural zeolite was used under different conditions, including treated zeolite thermally treated at 150°C for two hours and untreated natural zeolite. The results showed that heat-treated natural zeolite was more efficient in removing suspended solids, colour, and turbidity, with removal efficiencies and adsorption capacity of 66.2% (2.39 mg/g), 80.5% (21.50 mg/g), and 86.8% (0.77 mg/g), respectively. In the second series of experiments, the effects of various parameters affecting the adsorption process, such as adsorbent dosage and pH, were investigated. The optimum conditions for adsorbent dosage and pH were found to be 4 g/L and pH 4, respectively. The percent removal of all parameters reached over 70% with a peak time of 240 min. The adsorption isotherm was also studied, and it was found that the adsorption process was in good agreement with the Langmuir adsorption isotherm model. The study showed that adsorption treatment with natural zeolite was effective in removing turbidity, color, and TSS in POME wastewater. In addition, zeolite is a readily available and inexpensive adsorbent.

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“…Zeolites are an indispensable class of heterogeneous catalysts for energy and chemical production processes due to their unique pore structure, the catalytic activity provided by acidic sites, and their outstanding stability under severe environmental conditions. 1,2 The acidity and porosity of the ZSM-5 zeolites sieve exhibited excellent activity in the reaction to obtain aromatic compounds. 3–5 However, the inherent microporous structure of conventional zeolite catalysts such as ZSM-5 is a major obstacle to mass diffusion.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, it is highly susceptible to the formation of coke on the catalyst surface, resulting in pore clogging and active site deactivation. 2,6–8 To solve the problem that conventional microporous zeolites are prone to carbon buildup and thus lead to catalyst deactivation, researchers have proposed various solutions. 9,10 Wang et al 9 synthesized a ZSM-5@S1 core–shell molecular sieve by design.…”

Section: Introductionmentioning

confidence: 99%

“…Ideally, the multistage pore structure is a crystalline open frame with a stable aluminosilicate like zeolite and ordered multistage pores, micropores, and mesoporous pores composed to form a zeolite crystal frame structure. 2,12,13 However, disordered and unconnected multistage pore structures are often formed by the soft template method or acid–base treatment. 14 In these micro-mesoporous structures, zeolite materials with different pore sizes arranged on the core and shell have also received increasing attention due to their catalytic and separation advantages.…”

Section: Introductionmentioning

confidence: 99%

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Design and synthesis of core shells HZSM-5@MCM-41 with variable acidity and mesoporosity for lignin-catalyzed fast pyrolysis to prepare aromatics

Dai,

Guan,

Wang

et al. 2024

New J. Chem.

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The universal zeolite ZSM-5: Structure and synthesis strategies. A review

Cited by 26 publications

References 193 publications

A Study on the Ability of Nanomaterials to Adsorb NO and SO2 from Combustion Gases and the Effectiveness of Their Separation

A Study on the Ability of Nanomaterials to Adsorb NO and SO2 from Combustion Gases and the Effectiveness of Their Separation

Heat-Treated Zeolite as Effective Adsorbent for Final Treatment of Palm Oil Mill Effluent

Design and synthesis of core shells HZSM-5@MCM-41 with variable acidity and mesoporosity for lignin-catalyzed fast pyrolysis to prepare aromatics

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