Effects of cation size on infiltration and defiltration pressures of a MCM-41

Han, Aijie; Punyamurtula, Venkata K.; Qiao, Yu

doi:10.1063/1.2913010

Cited by 19 publications

(17 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculated liquid-solid contact angle values are 127° and 131° for water and 20 M LiCl solutions, respectively. Comparing to the literature on intrusion-extrusion of electrolyte solutions in mesoporous silica [38][39][40][41], the increase of intrusion pressure obtained in our case is found among the highest ones that is probably related to the use of highly concentrated solutions. However, for hydrophobic microporous materials such as pure silica zeolites and Metal-Organic Frameworks, the intrusion pressure rises much more drastically when using 20 M LiCl solution, in 2.1 -7.4 times in comparison with pure water [35][36][37]42].…”

Section: Intrusion-extrusion Experimentssupporting

confidence: 59%

“…It has been found that the use of electrolyte aqueous solution (LiCl, NaCl, KCl, MgCl2…) is an effective way to improve the energetic performance of HLS due to a considerable increase of the 4 intrusion pressure. A particularly high increase of intrusion pressure is observed for microporous materials such as hydrophobic zeolites [33][34][35][36] and metal-organic frameworks [37], where the pressure can rise in several times, whereas the increase is considerably lower for mesoporous silicas [38][39][40][41]. In some cases, highly concentrated electrolyte solutions (ones with H2O/M + molar ratio close or higher than ions coordination number) can also change the behavior of HLS [36,42,43].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High pressure intrusion of water and LiCl aqueous solutions in hydrophobic KIT-6 mesoporous silica: Influence of the grafted group nature

Pillot

Lebeau

Nouali

et al. 2019

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

High pressure intrusion-extrusion of water and LiCl aqueous solutions in KIT-6 mesoporous silica grafted with alkyl or perfluoroalkyl groups have been studied for absorption of mechanical energy. The "grafted KIT-6 -LiCl solution" systems demonstrate a shock absorber behavior with a large hysteresis between intrusion and extrusion curves and partially irreversible intrusion in the first intrusion-extrusion cycle. The samples of KIT-6 with perfluroalkyl grafting demonstrate higher values of intrusion pressure in comparison with ones grafted with alkyl groups, but lower intruded volume. It has been found that the intrusion of LiCl solutions leads to a considerable increase of intrusion pressure, particularly pronounced in the case of the samples

show abstract

Section: Intrusion-extrusion Experimentssupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

High pressure intrusion of water and LiCl aqueous solutions in hydrophobic KIT-6 mesoporous silica: Influence of the grafted group nature

Pillot

Lebeau

Nouali

et al. 2019

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

show abstract

“…Although a larger nanopore size implies less specific surface area, the energy absorption efficiency is not likely to be hampered too much due to the fact that, for a given porosity, the specific inner surface of nanoporous materials, which is proportional to D -1 , varies in the same pace as D; however, the simple several-fold increases in D can lead to orders of elevation in the magnitude of the effective viscosityη . Thus, high performance of NEASs is expected, which is consistent with the experimental observation, where when silica gel of larger nanopore size was used, the energy absorption density was higher [21,24,41]. On the other hand, the transport rate does affect the flowing properties inside nanotubes, but its significance is less pronounced than the size effect, although higher rate could dissipate more energy which agrees with experiment observations [42].…”

Section: Implication For Energy Absorptionsupporting

confidence: 89%

Confined Liquid Flow in Nanotube: A Numerical Study and Implications for Energy Absorption

Zhao¹,

Qiao²,

Culligan³

et al. 2010

Jnl of Comp & Theo Nano

Self Cite

View full text Add to dashboard Cite

Understanding nanofluidic behavior is of fundamental value to the development of many potential nano-technology applications, including high-performance energy absorption. We carry out non-equilibrium molecular dynamics (NEMD) simulations to study the transport characteristics of liquids in a confined nano-environment. It is shown that the distributed electric field arising from either an electrolyte water solution (due to the dissolved ions) or a polar solid surface, could lead to nanofluidic properties that are significantly different to those associated with pure water or a neutral nanotube. In addition, the nanopore size and the transport rate are shown to be important factors that strongly influence the flow process. The nominal viscosity and the shearing stress between the nanofluid and tube wall, which characterize the ease for nanofluid transport under an external driving force, are found to be dependent on the liquid phase and solid phase properties, as well as liquid flow rate and nanotube size. By varying properties of liquid phase and solid phase, liquid flow rate and nanotube size, the energy absorption characteristics of nanofluidic devices might be adjusted.

show abstract

“…As a part of an important number of studies of the water infiltration-defiltration process in nanoporous materials, 10,[76][77][78][79][80][81][82] Qiao and coworkers 83,84 demonstrated that water could no longer infiltrate (i.e. ''be soaked up spontaneously'') in a hydrophilic zeolite Y when an electrolyte was added.…”

Section: Intrusion Of Electrolyte Solutionsmentioning

confidence: 99%

Forced intrusion of water and aqueous solutions in microporous materials: from fundamental thermodynamics to energy storage devices

et al. 2017

View full text Add to dashboard Cite

We review the high pressure forced intrusion studies of water in hydrophobic microporous materials such as zeolites and MOFs, a field of research that has emerged some 15 years ago and is now very active. Many of these studies are aimed at investigating the possibility of using these systems as energy storage devices. A series of all-silica zeolites (zeosil) frameworks were found suitable for reversible energy storage because of their stability with respect to hydrolysis after several water intrusion-extrusion cycles. Several microporous hydrophobic zeolite imidazolate frameworks (ZIFs) also happen to be quite stable and resistant towards hydrolysis and thus seem very promising for energy storage applications. Replacing pure water by electrolyte aqueous solutions enables to increase the stored energy by a factor close to 3, on account of the high pressure shift of the intrusion transition. In addition to the fact that aqueous solutions and microporous silica materials are environmental friendly, these systems are thus becoming increasingly interesting for the design of new energy storage devices. This review also addresses the theoretical approaches and molecular simulations performed in order to better understand the experimental behavior of nano-confined water. Molecular simulation studies showed that water condensation takes place through a genuine first-order phase transition, provided that the interconnected pores structure is 3-dimensional and sufficiently open. In an extreme confinement situations such as in ferrierite zeosil, condensation seem to take place through a continuous supercritical crossing from a diluted to a dense fluid, on account of the fact that the first-order transition line is shifted to higher pressure, and the confined water critical point is correlatively shifted to lower temperature. These molecular simulation studies suggest that the most important features of the intrusion/extrusion process can be understood in terms of equilibrium thermodynamics considerations.

show abstract

Effects of cation size on infiltration and defiltration pressures of a MCM-41

Cited by 19 publications

References 37 publications

High pressure intrusion of water and LiCl aqueous solutions in hydrophobic KIT-6 mesoporous silica: Influence of the grafted group nature

High pressure intrusion of water and LiCl aqueous solutions in hydrophobic KIT-6 mesoporous silica: Influence of the grafted group nature

Confined Liquid Flow in Nanotube: A Numerical Study and Implications for Energy Absorption

Forced intrusion of water and aqueous solutions in microporous materials: from fundamental thermodynamics to energy storage devices

Contact Info

Product

Resources

About