CuO supported on COK-12 and SBA-15 ordered mesoporous materials for temperature swing SOx adsorption

Schobing, Julie; Cesário, Moisés R.; Dorge, Sophie; Nouali, Habiba; Patarin, Joël; Martens, Johan A.; Brilhac, Jean-François

doi:10.1016/j.fuproc.2020.106586

Cited by 8 publications

(2 citation statements)

References 41 publications

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“…The low-angle XRD patterns of RH-GO/SBA-15 powders for various gelation pH values are displayed in Figure 1 a. At pH 2, the spectrum of the sample exhibited three peaks at the (100), (110), and (200) planes, which corresponded to the typical characteristics of the hexagonal symmetrical SBA-15 structure [ 33 ]. The (110) and (200) peaks at pH 3–6 were considerably weaker, which indicated degradation of the SBA-15 mesostructure.…”

Section: Resultsmentioning

confidence: 99%

Utilization of Rice Husk Ash in the Preparation of Graphene-Oxide-Based Mesoporous Nanocomposites with Excellent Adsorption Performance

Liou

2021

Materials

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Rice husk is an agricultural biomass waste. Burning rice husks in an oxygenic atmosphere releases thermal energy and produces ash that is rich in silica. Rice husk ash (RHA) can be used as a sustainable source of silica for producing high-value-added products. In this study, mesostructural graphene oxide (GO)/SBA-15, a graphene-based hybrid material, was synthesized from RHA. The materials are inspected by Fourier transform infrared spectrometer, Raman spectrometer, field-emission scanning electron microscopy, transmission electron microscopy, surface area analyzer, and X-ray diffraction analyzer. Studies have revealed that GO/SBA-15 possesses various oxygen functional groups that are helpful for dye adsorption. The material consisted of high pore volume of 0.901 cm3/g, wide pores of diameter 11.67 nm, and high surface area of 499 m2/g. Analysis of the methylene blue (MB) adsorption behavior of GO/SBA-15 composites revealed that their adsorption capacity depended on the gelation pH, GO content, adsorbent dosage, and initial dye (MB) concentration. The highest adsorption capacity of GO/SBA-15 was 632.9 mg/g. Furthermore, the adsorption isotherms and kinetics of GO/SBA-15 were investigated. This study demonstrated the great advantage of treated RHA and the potential of this material for use in organic dye adsorption.

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Section: Resultsmentioning

confidence: 99%

Utilization of Rice Husk Ash in the Preparation of Graphene-Oxide-Based Mesoporous Nanocomposites with Excellent Adsorption Performance

Liou

2021

Materials

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“…Additionally, a number of other groups have utilized COK-12 for different purposes. [47][48][49][50][51][52] COK-12 is an excellent candidate for incorporation into a functional AM monolith. Previous work has studied the influence of sintering methods, and found that compaction followed by conventional sintering preserves some mesoporosity and that spark plasma sintering achieved higher mechanical strength.…”

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confidence: 99%

Robocasting of ordered mesoporous silica‐based monoliths: Rheological, textural, and mechanical characterization

Dal Molin,

Henning,

Müller

et al. 2023

Nano Select

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Hierarchically porous, high‐surface‐area silica materials are excellent candidates for multiple applications like catalysis and environmental remediation. Shaping these materials with additive manufacturing (AM) techniques, like robocasting, could enable their use with the benefit of on‐demand, customized shaping and maximizing performance. Herein, ordered mesoporous silica COK‐12 slurries were robocasted into monoliths, containing different ratios of uncalcined COK‐12 and sodium bentonite (0–25 wt.%). The rheology of the mixed slurries is characterized by lower flow indexes (0.69 vs. 0.32) and higher yield stresses (96 vs. 259 Pa) compared to pure COK‐12 ones. Monoliths were printed in woodpile structures and calcined at 600°C. Micro‐CT measurements showed a linear shrinkage of 25% after calcination. Mechanical characterization showed increased uniaxial strength (0.20 ± 0.07 to 1.0 ± 0.3 MPa) with increasing binder/solids ratio from 13 to 25%. The amorphous, mesoporous structure of COK‐12 was retained. The structures exhibited open porosities of 52 ± 4% and showed higher specific mesopore volumes, and increased average mesopore size (6 vs. 8 nm) compared to COK‐12. Small‐angle x‐ray scattering analysis revealed an increased lattice parameter (10.3 vs. 11.0 nm) and reduced wall thickness (3.1 nm vs. 4.1 nm) of the COK‐12 in the monoliths. These properties indicate suitability for their application as porous supports and adsorbents.

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Understanding heterogeneous catalysis: A brief study on performance parameters

Cesário

Barros

Aouad

et al. 2022

Heterogeneous Catalysis

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CuO supported on COK-12 and SBA-15 ordered mesoporous materials for temperature swing SOx adsorption

Cited by 8 publications

References 41 publications

Utilization of Rice Husk Ash in the Preparation of Graphene-Oxide-Based Mesoporous Nanocomposites with Excellent Adsorption Performance

Utilization of Rice Husk Ash in the Preparation of Graphene-Oxide-Based Mesoporous Nanocomposites with Excellent Adsorption Performance

Robocasting of ordered mesoporous silica‐based monoliths: Rheological, textural, and mechanical characterization

Understanding heterogeneous catalysis: A brief study on performance parameters

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