On the application of standard isotherms to hydrogen adsorption in microporous materials

Al-Hajjaj, A. A.; Zamora, B.; Shah, Akeel A.; Reguera, E.; Bavykin, Dmitry V.; Walsh, Frank C.

doi:10.1016/j.ijhydene.2011.07.110

Cited by 10 publications

(3 citation statements)

References 39 publications

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“…The hydrogen storage in different regions of the tank is highly dependent on the distribution of the temperature. Because the pressure variation in the bed is minor, the hydrogen storage distribution in a region is mainly determined by the region's temperature [40].…”

Section: Temperature and Hydrogen Storage Distribution In The Charging Processmentioning

confidence: 99%

Experimental and numerical investigation of the cryogenic hydrogen storage processes over MOF-5

Hou

Sulic

Ortmann

et al. 2016

International Journal of Hydrogen Energy

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Section: Temperature and Hydrogen Storage Distribution In The Charging Processmentioning

confidence: 99%

Experimental and numerical investigation of the cryogenic hydrogen storage processes over MOF-5

Hou

Sulic

Ortmann

et al. 2016

International Journal of Hydrogen Energy

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“…Over the years, a huge amount of adsorption equations have been formulated, e.g., Langmuir, Freundlich, Sips, Redlich‐Peterson, Toth , to describe adsorption equilibria in the gas/solid system. However, the modeling of a high‐pressure adsorption process on activated carbons at supercritical temperature is connected with specific requirements.…”

Section: Introductionmentioning

confidence: 99%

“…However, the modeling of a high‐pressure adsorption process on activated carbons at supercritical temperature is connected with specific requirements. The most important is the ability to predict the high‐pressure maximum typical for both indirect (volumetric) and direct (gravimetric) methods . This study covers all above‐mentioned issues on activated carbons from biowaste agricultural materials.…”

Section: Introductionmentioning

confidence: 99%

Excess Adsorption Isotherms of Hydrogen on Activated Carbons from Agricultural Waste Materials

et al. 2017

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Four activated carbons based on red mombin seeds, cocoa pod husk, the external part of mango pits, and coffee husk were prepared by chemical activation using zinc chloride. Adsorption isotherms of hydrogen measured by a volumetric method under supercritical conditions corresponding to the three temperature levels and the pressure up to ten bars were determined. The dependence of the adsorbed amount of hydrogen on equilibrium pressure was linear for all adsorption isotherms measured at ambient temperatures. The corresponding excess adsorption experimental data were fitted by Henry's adsorption isotherm with an excellent accordance. The Dubinin‐Radushkevich adsorption isotherm was demonstrated to match the excess adsorption data at cryogenic temperatures with high accuracy.

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Modification of natural clinoptilolite zeolite to enhance its hydrogen adsorption capacity

Akyalcin,

Ertugrul

2024

Res Chem Intermed

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In this study, natural clinoptilolite was treated with HCl, HNO3, and C2H2O4 at various concentrations (0.1, 0.5, and 1.0 M) at different temperatures (60, 70, and 80 °C) and treatment times (2, 3, and 4 h). The hydrogen adsorption capacity of natural clinoptilolite increased from 0.446 to 3.255 mmol/g after treating with 0.5 M HNO3 at 80 °C for 2 h. The correlation of the newly produced textural and structural properties with hydrogen adsorption ability is explained by characterizing the modified clinoptilolites using X-ray fluorescence (XRF), X-ray diffraction (XRD), nitrogen adsorption/desorption isotherms, and temperature programmed desorption of ammonia (NH3-TPD) measurements. The results show that the hydrogen adsorption capacity of modified clinoptilolites is associated with both the quantity and strength of the strong acid sites, in addition to the enhanced surface area and micropore volume. The hydrogen adsorption data for natural and acid-treated clinoptilolite samples at 77 K obeyed the Freundlich isotherm model.

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On the application of standard isotherms to hydrogen adsorption in microporous materials

Cited by 10 publications

References 39 publications

Experimental and numerical investigation of the cryogenic hydrogen storage processes over MOF-5

Experimental and numerical investigation of the cryogenic hydrogen storage processes over MOF-5

Excess Adsorption Isotherms of Hydrogen on Activated Carbons from Agricultural Waste Materials

Modification of natural clinoptilolite zeolite to enhance its hydrogen adsorption capacity

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