Synthesis, Structure, and Acidic Properties of MCM‐41 Functionalized with Phosphate and Titanium Phosphate Groups

Ковальчук, Т. В.; Sfihi, H.; Korchev, A. S.; Коваленко, А. С.; Il’in, V. G.; Zaitsev, V. N.; Fraissard, J.

doi:10.1002/chin.200544238

Cited by 3 publications

(5 citation statements)

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“…2 The pyrophosphoric acid is followed by its transformation into metaphosphonic acid (evidenced by the detection of the peak at 392°C of DTG curves). This can be described [36] according to Eq. 3:…”

Section: Resultsmentioning

confidence: 99%

“…For instance, cetyl trimethyl ammonium bromide as a cationic surfactant, was used to synthesize high surface area of TP with mesoporous structure [31], anionic surfactants were used as templates to synthesize mesoporous TPs which were only stable up to 300°C [32], hydrothermal synthesis by using organic molecules in fluorinated media was successful to obtain a TP [33], a long chain alkylamine was reported to be used as a surfactant in synthesize a mesoporous TP [34] while a non-ionic surfactant route applied to synthesize stable and relatively high BET surface area (~250-350 m 2 g −1 ) mesoporous titanium oxo phosphate [35]. Mesoporous Ti-MCM-41 functionalized with phosphate group by treatment with POCl 3 which affected the textural properties of the Ti-MCM-41(P) [36] is another example showing the applicability and significance of mesoporous TP.…”

Section: Introductionmentioning

confidence: 99%

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Titanium phosphates as positive electrode in lithium-ion batteries: composition, phase purity and electrochemical performance

Attia

Wang

Huang

et al. 2011

J Solid State Electrochem

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Titanium phosphate materials were synthesized by evaporation-induced self assembly method by using Ti(OC4H9)(4) and PCl3, in the presence of Pluronic (P123) as a non-ionic surfactant template. The molar ratios of P/Ti and the heat treatment of the materials affected their structures, particle geometries and electrochemical performances as indicated by X-ray powder diffraction, thermal gravimetric analysis, scanning electron and transmission electron microscopy and other electrochemical techniques. As expected, increasing the temperature to 800 A degrees C for 3 h resulted in losing the mesoporosity and generally led to a decrease in capacity of these materials. Cyclic voltammetry showed that TiP2O7 is formed at 500 A degrees C for 10 h at a molar ratio P/Ti = 0.412 as amorphous phase. On the other hand, at molar ratio P/Ti = 2.06 showed sharp peaks indicated TiP2O7 transformed into crystalline material showed lower peak separation potential indicated that kinetic reactions might be favored.Xiamen University; National Natural Science Foundation of China [20873115, 90606015]; National Basic Research Program of China (973 program) [2007CB209702

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Titanium phosphates as positive electrode in lithium-ion batteries: composition, phase purity and electrochemical performance

Attia

Wang

Huang

et al. 2011

J Solid State Electrochem

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“…It has uniform and adjustable mesoporous, high surface area, and large pore volume. However, the acidity and hydrothermal stability lower than conventional zeolites (Kovalchuk et al 2005;Taguchi and Schüth 2005;Bhattacharyya, Lelong, and Saboungi 2006;Chen, Meng, and Xiao 2011). Purely siliceous materials are poor in any catalytic activity.…”

Section: Introductionmentioning

confidence: 97%

“…Purely siliceous materials are poor in any catalytic activity. To obtain acidic sites, tetrahedrally coordinated Al species have been successfully introduced into the walls of MCM-41 (Kovalchuk et al 2005;Chen, Meng, and Xiao 2011).…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of Mesoporous Materials as Catalyst in Fast Pyrolysis of Wheat Straw

Ateş

Tophanecioglu²,

Pütün

2014

International Journal of Green Energy

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In this study, wheat straw was chosen as a biomass sample and the fast pyrolysis of this sample was carried out with or without catalyst at different conditions in a well-swept fixed-bed reactor. Experiments were carried out in a well-swept tubular fixed-bed reactor with a heating rate of 300 • C/min, between pyrolysis temperature ranges 300-800 • C in the nitrogen atmosphere. The results indicated that a maximum oil yield of 31.9% was obtained at a pyrolysis temperature of 500 • C in non-catalytic procedure. Siliceous and Al-MCM-41 materials were evaluated as potential catalysts in the pyrolysis experiments. Mesoporous materials have large pore dimensions with strong acid sites. These acidic sites catalyze some reactions in pyrolysis. The product yields and the quality of bio-oil were influenced with using MCM-41 materials. The bio-oil yield was reduced, whereas the gas yield increased with using a catalyst in the experiments. An increase in the fractions of pure phenol, alkyl phenols, alkenes+alkanes, carbonyls, aromatic, and cyclic compounds and a decrease in the fractions of methoxy phenols, acids+esters, furans, and alcohols were observed in the presence of Al-MCM-41 material. According to all results, the use of Al-MCM-41 materials as catalyst in the pyrolysis can be suggested to obtain both quality fuels and valuable chemicals.

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“…One of the widely implemented nanomaterials in oil field processing is the hydrophilic silica nanoparticles with different geometries and crystal structure (Zargartalebi et al, 2015). Ordered molecular sieved silica-based materials have uniform pores <50 nm, high surface area, abundant hydroxyl groups and narrow pore size distribution (Kovalchuk et al, 2005), so used in many applications involving catalysis, energy storage, and environmental remediation (Wang et al, 2016). Moreover, it displays adsorption criteria at the oil/brine/rock interfaces, which in turn producing shear and wetting action on the crude oil layer (Maghzi et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Assessment of xanthan gum and xanthan-g-silica derivatives as chemical flooding agents and rock wettability modifiers

Soliman

El-hoshoudy

Attia

2020

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Currently, biomolecules flooding in the underground reservoirs acquires sustainable interest owing to their availability and eco-friendly properties. The current study reported chemical displacement by xanthan gum as well as xanthan/SiO2 and xanthan grafted with vinylsilane derivatives. Chemical characterization evaluated by traditional spectroscopic methods. Investigation of fluids response to reservoir environment assessed through rheological performance relative to shearing rate, ionic strength, and thermal stability. A sequence of flooding runs generated on 10 sandstone outcrops with different porosity and permeabilities. Core wetness assessed through relative permeability curves at different water saturation. The flooding tests indicate that grafting of the silica derivative overcome the shortage of xanthan solution in flooding operations relative to the reservoir conditions. The ability of the flooding solutions to alter rock wettability explored through relative permeability curves at different water saturation. The results reveal that the synthesized composite was a promised agent for enhancing oil recovery and profile conformance.

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Synthesis, Structure, and Acidic Properties of MCM‐41 Functionalized with Phosphate and Titanium Phosphate Groups

Cited by 3 publications

References 1 publication

Titanium phosphates as positive electrode in lithium-ion batteries: composition, phase purity and electrochemical performance

Titanium phosphates as positive electrode in lithium-ion batteries: composition, phase purity and electrochemical performance

The Evaluation of Mesoporous Materials as Catalyst in Fast Pyrolysis of Wheat Straw

Assessment of xanthan gum and xanthan-g-silica derivatives as chemical flooding agents and rock wettability modifiers

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