Adsorption Potential Distributions for Silicas and Organosilicas

Choma, J.; Jaroniec, Mietek

doi:10.1260/0263-6174.25.8.573

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…The obtained isotherms were also converted into APDs curves [59][60][61]. The APDs curve is the first derivative of the so called characteristic curve, which presents adsorption as a function of the adsorption potential (A pot ) defined as:…”

Section: Analysing Adsorption Isothermsmentioning

confidence: 99%

New Virtual Porous Carbons Based on Carbon EDIP Potential and Monte Carlo Simulations

Furmaniak¹

2013

CMST

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Using simple Metropolis Monte Carlo simulations, the series of virtual porous carbons (VPCs) is generated. During the computations, the carbon EDIP potential is employed. Structures in the series have systematically changing porosity due to the differences in the carbon density. The obtained VPCs are similar to the model proposed by Harris et al., but they do not show its main drawback, because they contain curved fullerene-like sheets, which are interconnected and form one three-dimensional structure. The porosity of VPCs is characterised using a simple geometrical method proposed by Bhattacharya and Gubbins. In order to confirm the reality of the obtained new model carbons and their usefulness for modelling of adsorption phenomena, Monte Carlo simulations of argon adsorption on them are performed. The obtained isotherms are analysed using standard adsorption methods like αs-plots, adsorption potential distributions curves and Dubinin-Astakhov model. The results reveal a close relationship between the systematic changes in the porosity and the adsorption properties. The observed regularities correspond with experimental observations and theoretical studies.

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Section: Analysing Adsorption Isothermsmentioning

confidence: 99%

New Virtual Porous Carbons Based on Carbon EDIP Potential and Monte Carlo Simulations

Furmaniak¹

2013

CMST

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“…Moreover, it is mechanically, physically and thermally stable, non-toxic and non-corrosive [7]. Its surface can be easily modified [8]; [9]. Silica gel is a material of a significant importance in process engineering.…”

Section: Adsorption-desorption On Desiccantsmentioning

confidence: 99%

Theoretical and Experimental Analysis of Atmospheric Water Harvesting Device

Adeyanju¹

2020

Progress in Canadian Mechanical Engineering. Volume 3

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A semi-open atmospheric water harvesting device using atmospheric water vapor processing technology was designed and built. The processor is a device which extract water molecules from the atmosphere, ultimately causing a phase change from vapor to liquid. This is done by concentrating air, containing water vapor through a solid desiccant. Then heating the desiccant to remove the air and allow it to condense and then collect the condensate.The research focuses on the development of a relationship for the amount of silica gel to the amount of water produced to determine the sufficient amount required for the specific application. This relationship was found to be = 1.0776 − 0.4752, with a solar panel efficiency of 10.7%.The recorded values collected were then used to calculate the amount of water produced and were compared to the actual amount of water collected.The study concentrates on the extracting potable water from air especially with respect to the remote/rural arid places with deficit of natural fresh water and electricity supply. Solar energy as a power supply were focused on with discussing their strengths and limitations.

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“…We also determined the values of Henry's constant (K H ) from the slope of the linear part of adsorption isotherms in the low-pressure range [83]. Finally, adsorption potential distribution (APD) curves [93][94][95] were calculated. The APD curve is the first derivative of the so-called characteristic curve, presenting adsorption amount as a function of the adsorption potential (A pot ) defined as:…”

Section: Simulation Detailsmentioning

confidence: 99%

Gyroidal nanoporous carbons - Adsorption and separation properties explored using computer simulations

Furmaniak¹,

Gauden²,

Terzyk³

et al. 2016

Condens. Matter Phys.

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Adsorption and separation properties of gyroidal nanoporous carbons (GNCs) -a new class of exotic nanocarbon materials are studied for the first time using hyper parallel tempering Monte Carlo Simulation technique. Porous structure of GNC models is evaluated by the method proposed by Bhattacharya and Gubbins. All the studied structures are strictly microporous. Next, mechanisms of Ar adsorption are described basing on the analysis of adsorption isotherms, enthalpy plots, the values of Henry's constants, α s and adsorption potential distribution plots. It is concluded that below pore diameters ca. 0.8 nm, primary micropore filling process dominates. For structures possessing larger micropores, primary and secondary micropore filling mechanism is observed. Finally, the separation properties of GNC toward CO 2 /CH 4 , CO 2 /N 2 , and CH 4 /N 2 mixtures are discussed and compared with separation properties of Virtual Porous Carbon models. GNCs may be considered as potential adsorbents for gas mixture separation, having separation efficiency similar or even higher than activated carbons with similar diameters of pores.

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Adsorption Potential Distributions for Silicas and Organosilicas

Cited by 4 publications

References 23 publications

New Virtual Porous Carbons Based on Carbon EDIP Potential and Monte Carlo Simulations

New Virtual Porous Carbons Based on Carbon EDIP Potential and Monte Carlo Simulations

Theoretical and Experimental Analysis of Atmospheric Water Harvesting Device

Gyroidal nanoporous carbons - Adsorption and separation properties explored using computer simulations

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