CO 2 adsorption–desorption properties of zeolite beta prepared from OSDA-free synthesis

Kamimura, Yoshihiro; Shimomura, Marie; Endo, Akira

doi:10.1016/j.micromeso.2015.07.033

Cited by 29 publications

(10 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pham et al [17] tested microporous SSZ-13 with Si/Al = 12 for CO 2 adsorption and noted that sodium and lithium forms could capture approximately 4 mmol•g −1 , with potassium and proton analogues reaching adsorption capacities of 3.60 and 3.30 mmol•g −1 , respectively. These values are comparable to those obtained in the literature for low-silica zeolite adsorbents [20,21], highlighting the potential of chabazite for this application.…”

Section: Introductionsupporting

confidence: 88%

Hierarchical Mesoporous SSZ-13 Chabazite Zeolites for Carbon Dioxide Capture

Hillen

Degirmenci

2021

Catalysts

View full text Add to dashboard Cite

Artificial carbon dioxide capture is an alternative method to remove the carbon dioxide already accumulated in the atmosphere as well as to stop its release at its large-scale emission points at the source, such as at power plants. However, new adsorbents are needed to make the approach feasible. For this purpose, in this study, hierarchical mesoporous-microporous chabazite-type zeolites were synthesised by applying a dual-templating method. The microporous zeolite structure-directing agent N,N,N-trimethyl-1-adamantanammonium hydroxide was combined with an organosilane mesopore-generating template, 3-(trimethoxysilyl)propyl octadecyl dimethyl ammonium chloride. Materials were characterised for their structural and textural properties and tested for their carbon dioxide capture capacity both in their original sodium form and in their proton-exchanged form by means of breakthrough curve analysis and sorption isotherms. The influence of template ratios on their structure, carbon dioxide capture, and capacity have been identified. All mesoporous materials showed fast adsorption-desorption kinetics due to a reduction in the steric limitations via the introduction of a meso range network of pores. The hierarchical zeolites are recyclable with a negligible loss in crystallinity and carbon dioxide capture capacity, which makes them potential materials for larger-scale application.

show abstract

Section: Introductionsupporting

confidence: 88%

Hierarchical Mesoporous SSZ-13 Chabazite Zeolites for Carbon Dioxide Capture

Hillen

Degirmenci

2021

Catalysts

View full text Add to dashboard Cite

show abstract

“…Previous reports of varying zeolite framework topologies [8,9,13,17,18] adopting as eed-assisted, OSDA-free approach also showed products in the absence or ar elatively small amount of extra-framework Al. In ar elated matter,r ecent works [47][48][49] showedt hat zeolite beta obtained from seed-assisted, OSDAfree synthesis exhibitedadifferent Al distribution compared to that of conventional OSDA-directed beta. [42][43][44][45][46] According to Kennedy et al, [42,43] the 27 Al DD-MASN MR peak attributed to four-coordinated framework Al can be resolved into three overlapped signals around d Al = 61, 56 and 50 ppm, assigned to the T 2 , T 1 + T 3 + T 4 + T 5 + T 8 ,a nd T 6 + T 7 sites, respectively (see Figure S8 in the Supporting Information for as chematic representation).…”

Section: Resultsmentioning

confidence: 99%

“…Although the detailed mechanism for Al siting is still unclear, the above results by 27 Al DD‐MAS NMR spectroscopy suggest that the local distribution of T‐sites such as Al atoms within the MWW framework could be different depending on the synthetic methodology adopted (OSDA‐directed or seed‐assisted with OSDA‐free gel). In a related matter, recent works showed that zeolite beta obtained from seed‐assisted, OSDA‐free synthesis exhibited a different Al distribution compared to that of conventional OSDA‐directed beta.…”

Section: Resultsmentioning

confidence: 99%

Seed‐Assisted Synthesis of MWW‐Type Zeolite with Organic Structure‐Directing Agent‐Free Na‐Aluminosilicate Gel System

Kamimura

Itabashi

Kon

et al. 2017

Chemistry An Asian Journal

Self Cite

View full text Add to dashboard Cite

The seed-assisted synthesis of zeolites without using organic structure-directing agents (OSDAs) has enabled alternative routes to the simple, environmentally friendly and low-cost production of industrially important zeolites. In this study, the successful seed-assisted synthesis of MCM-22 (MWW-type) zeolite with an OSDA-free gel is reported for the first time. MWW-type zeolites are obtained by the addition of as-synthesized MCM-22 seeds prepared with hexamethyleneimine (HMI) into OSDA-free Na-aluminosilicate gels. Based on the results of XRD, ICP-AES, NMR, N physisorption and NH -TPD, the product exhibited different features compared to those of the seeds. The H-form product can serve as a catalyst in Friedel-Crafts alkylation reaction of anisole with 1-phenylethanol, and its catalytic activity is comparable to the seeds. Furthermore, XRD, FE-SEM, TG-DTA, CHN, FT-IR and NMR analyses of products and intermediates provide insights into the role of seeds and occluded HMI, the crystallization process, and key factors for achieving seed-assisted synthesis of MWW-type zeolites with an OSDA-free gel system. The present results provide a new perspective for the economical and environmentally friendly production of MWW-type zeolites.

show abstract

“…Hence, only trace amounts of β zeolite building units can be generated with the presence of template after crystallization for 42 h, leading to the crystals growing slowly and forming large-sized crystals featuring a disorderly stacked morphology. For the Nano-B 600 synthesis, due to the addition of seed crystals, the building units with a long-period structure could be easily formed in the early crystallization stage, especially the 6MR unit, which promotes the nucleation and growth of β zeolite. ,,, In addition, the large number of fragments would act as anchors and a mass of silica species in the gel could show epitaxial growth to form β zeolite. As more and more silica species anchored into the building units, the excessive silica could not be incorporated into the new crystals.…”

Section: Resultsmentioning

confidence: 99%

β Zeolite Nanostructures with a High SiO₂/Al₂O₃ Ratio for the Adsorption of Volatile Organic Compounds

Wang

Cao

Sun

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

β Zeolites with a high SiO2/Al2O3 ratio (SAR) are of great importance in the adsorption of VOCs. However, the higher the SAR of β zeolites, the more difficult they are to synthesize because of kinetic limitations. Herein, adopting a seed-assisted synthesis ensures that β zeolites have a high yield and a wide range of SAR (up to 600, named Nano-B600). Furthermore, a comprehensive insight into the evolution of particle structure in the synthesis system and the influence of seed crystals was gained by a synchrotron radiation small-angle X-ray scattering (SAXS) technology, FT-IR, SEM, and TEM. The results showed that the species dissolved from seed crystals present appropriate fractal structure, promoting the formation of a large number of structural units and leading to the rapid growth of β zeolites. Typically, Nano-B600 possesses a larger surface area and mesopore volume as well as strong hydrophobicity, which shows super toluene adsorption capacity, with an increase of 43% compared to that of the bulk β zeolites with a similar SAR, and can also maintain adsorption performance under moisture. For other organic compounds, Nano-B600 shows a much higher adsorption capacity compared to that of the usual ZSM-5 and Y zeolites. The high-silica nanosized β zeolites demonstrate strong applicability as super adsorption materials for VOCs.

show abstract

CO 2 adsorption–desorption properties of zeolite beta prepared from OSDA-free synthesis

Cited by 29 publications

References 67 publications

Hierarchical Mesoporous SSZ-13 Chabazite Zeolites for Carbon Dioxide Capture

Hierarchical Mesoporous SSZ-13 Chabazite Zeolites for Carbon Dioxide Capture

Seed‐Assisted Synthesis of MWW‐Type Zeolite with Organic Structure‐Directing Agent‐Free Na‐Aluminosilicate Gel System

β Zeolite Nanostructures with a High SiO₂/Al₂O₃ Ratio for the Adsorption of Volatile Organic Compounds

Contact Info

Product

Resources

About

CO 2 adsorption–desorption properties of zeolite beta prepared from OSDA-free synthesis

Cited by 29 publications

References 67 publications

Hierarchical Mesoporous SSZ-13 Chabazite Zeolites for Carbon Dioxide Capture

Hierarchical Mesoporous SSZ-13 Chabazite Zeolites for Carbon Dioxide Capture

Seed‐Assisted Synthesis of MWW‐Type Zeolite with Organic Structure‐Directing Agent‐Free Na‐Aluminosilicate Gel System

β Zeolite Nanostructures with a High SiO2/Al2O3 Ratio for the Adsorption of Volatile Organic Compounds

Contact Info

Product

Resources

About

β Zeolite Nanostructures with a High SiO₂/Al₂O₃ Ratio for the Adsorption of Volatile Organic Compounds