Mesoporous Silica: A Suitable Adsorbent for Amines

Zamani, Cyrus; Illa, Xavi; Abdollahzadeh-Ghom, Sara; Morante, J.R.; Rodríguez, Albert

doi:10.1007/s11671-009-9396-5

Cited by 22 publications

(8 citation statements)

References 22 publications

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“…Chemisorption and physisorption of NH 3 on oxide material have been studied [12]. In the past literatures, it is reported that NH 3 was chemisorbed on silica surface forming the NH 3 -O-Si [19] or NH 2 -Si [20] with a siloxane bond (Si-O-Si).…”

Section: Adsorption Equilibrium Studymentioning

confidence: 99%

“…The highly regular pore structure and internal surface area of ordered MS make these particles attractive substrates that can be tailored for NH 3 adsorption [8]. For example, MS particles showed very high uptake capacities and selectivities for CH 4 [9], CO 2 [10], H 2 S [11], NH 3 [12], and volatile organic vapors [13]. Few studies on the removal of hazardous gases by adsorption using MA are reported, even though MA and MS share similar pore properties and high thermal stabilities, as seen in comparison to reports about MS in the literature [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of ammonia using mesoporous alumina prepared by a templating method

Yeom

Kim

2017

Environmental Engineering Research

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Ammonia, NH3, is a key chemical widely used in chemical industries and a toxic pollutant that impacts human health. Thus, there is a need for the development of effective adsorbents with high uptake capacities to adsorb NH3. An adsorbent with a high surface area and a small pore size is generally preferred in order to have a high capacity for the removal of NH3. The use inorganic nanoporous materials as gas adsorbents has increased substantially and emerged as an alternative to zeolite and activated carbon. Herein, mesoporous alumina (MA) was prepared and used as an NH3 adsorbent. MA showed good pore properties such as a uniform pore size and interlinked pore system, when compared to commercial adsorbents (activated carbon, zeolite, and silica powder). MA has free hydroxyl groups, serving as useful adsorption sites for NH3. In an adsorption isotherm test, MA exhibited 4.7-6.5 times higher uptake capacities for NH3 than commercial adsorbents. Although the larger surface areas of adsorbents are important features of ideal adsorbents, a regular and interlinked adsorbent pore system was found to be a more crucial factor to adsorb NH3.

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Section: Adsorption Equilibrium Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of ammonia using mesoporous alumina prepared by a templating method

Yeom

Kim

2017

Environmental Engineering Research

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“…However, several prerequisites need to be fulfilled for any practical use, including safe and efficient storage media with high volumetric uptakes, a facile cracking process, and an effective capture and removal system since even 1 ppm of NH 3 can poison proton exchange membrane fuel cells . A variety of materials have been investigated as storage and capture media for NH 3 , such as activated carbons, zeolites, , mesoporous silica, , and organic polymers. , Although porous materials as regenerable NH 3 capture systems have been demonstrated, many are limited by factors such as low storage capacity, irreversible uptake, and/or low packing density of stored NH 3 , which restrict their on-board applications due to the additional volume required for the storage system.…”

Section: Introductionmentioning

confidence: 99%

Exceptional Packing Density of Ammonia in a Dual-Functionalized Metal–Organic Framework

Marsh

Han

et al. 2021

J. Am. Chem. Soc.

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We report the reversible adsorption of ammonia (NH 3 ) up to 9.9 mmol g –1 in a robust Al-based metal–organic framework, MFM-303(Al), which is functionalized with free carboxylic acid and hydroxyl groups. The unique pore environment decorated with these acidic sites results in an exceptional packing density of NH 3 at 293 K (0.801 g cm –3 ) comparable to that of solid NH 3 at 193 K (0.817 g cm –3 ). In situ synchrotron X-ray diffraction and inelastic neutron scattering reveal the critical role of free −COOH and −OH groups in immobilizing NH 3 molecules. Breakthrough experiments confirm the excellent performance of MFM-303(Al) for the capture of NH 3 at low concentrations under both dry and wet conditions.

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“…KIT-6 mesoporous silica is produced according to the procedures reported previously by Zamani et al [11] with some modifications. KIT-6 was synthesized in acidic conditions using a mixture of Pluronic P123 triblock copolymer (EO 20 PO 70 EO 20 ) and butanol.…”

Section: Preparation Of Kit-6 Silicamentioning

confidence: 99%

Preparation of mixed matrix membrane using cellulose acetate incorporated with synthesized KIT-6 silica

Ding¹,

Chew²,

Oh³

et al. 2018

J. MECH. ENG. SCI.

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There is increasing interest among researchers to develop Mixed Matrix Membranes (MMMs), by incorporating fillers in polymer membranes. However, these membranes always suffer from a trade-off between permeability and selectivity as proven by Robeson in upper bound curves developed in gas separation applications. In current project, mesoporous silica, KIT-6 was synthesized and followed by incorporation of KIT-6 as filler into cellulose acetate (CA) matrix to form MMMs. The fabrications of MMMs were done by using dry phase inversion method. The KIT-6 loadings in the MMMs were varied from 2 to 10 wt%. The properties of KIT-6 and membranes were characterized with Scanning electron microscopy (SEM), Fourier transform infrared (FTIR), X-ray diffraction (XRD) and thermal gravimetric analysis (TGA). The effect of KIT-6 loadings on the properties of the formed MMMs was investigated. XRD and FTIR results suggested that KIT-6 mesoporous silica is successfully synthesized. The TGA curve indicate the overall weight loss of 3.02 % for KIT-6 and 72.29-86.77 % for all the membranes. The successful incorporation of silica particles into CA polymer matrix is confirmed by FTIR spectrum while MMMs images from SEM suggested that KIT-6 silica powder could embed well with CA polymer matrix. Defect-free MMMs could be fabricated and potential to be use in future especially in gas separation.

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Mesoporous Silica: A Suitable Adsorbent for Amines

Cited by 22 publications

References 22 publications

Adsorption of ammonia using mesoporous alumina prepared by a templating method

Adsorption of ammonia using mesoporous alumina prepared by a templating method

Exceptional Packing Density of Ammonia in a Dual-Functionalized Metal–Organic Framework

Preparation of mixed matrix membrane using cellulose acetate incorporated with synthesized KIT-6 silica

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