Modeling of Adsorption Isotherms for Hydrogen on Zeolite ZSM-5

2011 ◽  
Vol 391-392 ◽  
pp. 732-736
Author(s):  
Xiao Ming Du
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Adsorption Isotherms ◽  
Lattice Theory ◽  
Analytic Solution ◽  
Hydrogen Adsorption ◽  
Experimental Results ◽  
Slit Pores ◽  
Modeling Of Adsorption ◽  
Pressure Hydrogen

We give the analytic solution of Ono-Kondo equation based on lattice theory to describe the supercritical high-pressure hydrogen adsorption inside slit pores of adsorbents, and predict adsorption isotherms for hydrogen on microporous ZSM-5 zeolite at 77K,195K and 293K. The results from prediction are compared with the experimental data. It shows that the model can elucidate the peculiar features in adsorption isotherms of supercritical hydrogen which are fundamentally different from those of standard (IUPAC) classification, and the results from the equation also qualitatively reflect the experimental results.

Modeling of Adsorption Isotherms for Supercritical Hydrogen on A and X Zeolite

2012 ◽  
Vol 487 ◽  
pp. 719-723
Author(s):  
Xiao Ming Du
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Adsorption Isotherms ◽  
Lattice Theory ◽  
Analytic Solution ◽  
Hydrogen Adsorption ◽  
X Zeolite ◽  
Type Zeolite ◽  
Modeling Of Adsorption ◽  
Pressure Hydrogen

we give the analytic solution of Ono-Kondo equation based on lattice theory to describe the supercritical high-pressure hydrogen adsorption inside cylindric pores of adsorbents, and predict adsorption isotherms for hydrogen on A and X type zeolite at 77K. It is shown that the model reflects the peculiar features in adsorption isotherms of supercritical hydrogen in particular, a maximum in the adsorption with increasing pressure) .The results from prediction are compared with the experimental data. It shows that the model can elucidate the peculiar features in adsorption isotherms of supercritical hydrogen which are fundamentally different from those of standard (IUPAC) classification, and the results from the equation also qualitatively reflect the experimental results.

Peculiarities of high-pressure hydrogen adsorption on Pt catalyzed Cu-BTC metal–organic framework

2021 ◽  
Vol 23 (7) ◽  
pp. 4277-4286
Author(s):  
S. V. Chuvikov ◽  
E. A. Berdonosova ◽  
A. Krautsou ◽  
J. V. Kostina ◽  
V. V. Minin ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressures ◽  
Hydrogen Adsorption ◽  
Metal Organic Framework ◽  
Pt Catalyst ◽  
Metal Organic ◽  
Pt Catalyzed ◽  
Pressure Hydrogen ◽  
Organic Framework

Pt-Catalyst plays a key role in hydrogen adsorption by Cu-BTC at high pressures.

scholarly journals High-Pressure Hydrogen Adsorption on a Porous Electron-Rich Covalent Organonitridic Framework

ACS Omega ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 444-448 ◽  
Author(s):  
Maxwell Murialdo ◽  
Nicholas J. Weadock ◽  
Yiqun Liu ◽  
Channing C. Ahn ◽  
Sarah E. Baker ◽  
...  
Keyword(s):  
High Pressure ◽  
Hydrogen Adsorption ◽  
Pressure Hydrogen

scholarly journals Hydrogen Adsorption Isotherms: Modelling of Experimental Data

2006 ◽  
Vol 142 (1-2) ◽  
pp. 83-89 ◽  
Author(s):  
Stefan Tibus ◽  
Jürgen Klier ◽  
Paul Leiderer
Keyword(s):  
Experimental Data ◽  
Adsorption Isotherms ◽  
Hydrogen Adsorption

Simulation of Structural Parameters and Superconducting Transition Temperature of MgB2 under Pressure

2005 ◽  
Vol 475-479 ◽  
pp. 3319-3322
Author(s):  
Yang Shao ◽  
X. Zhang ◽  
Fu Ling Tang
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
Pressure Effect ◽  
Structural Parameters ◽  
Experimental Results ◽  
Bcs Theory ◽  
Superconducting Transition ◽  
Potential Parameters

We successfully developed the potential parameters for simulation of MgB2. With these potential parameters, we calculate the lattice parameters and volume variations with pressure up to 240GPa. All these results agree well with experimental data under 40GPa and provide reasonable tendencies from 40GPa to 240GPa. By employing the McMillan expression, it is found that the lattice stiffening dominants the behavior of Tc under pressure in the scope of BCS theory. Using our calculated Grüneisen parameter G g , the simulated pressure effect on Tc accords well with experimental results. Our result shows that the Tc of MgB2 can be destroyed by high pressure.

UNCONFINED HYDROGEN DETONATIONS: EXPERIMENTS, MODELING, AND SCALING

2020 ◽  
Author(s):  
M. KUZNETSOV ◽  
◽  
A. LELYAKIN ◽  
J. XIAO ◽  
W. BREITUNG ◽  
...  
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Ambient Air ◽  
Wide Distribution ◽  
Safety Measures ◽  
The World ◽  
Accident Scenarios ◽  
Existing Data ◽  
High Technologies ◽  
Pressure Hydrogen

Hydrogen use as an energy carrier and wide distribution of hydrogen in high technologies over the world, especially taking into account the explosivity of hydrogen being mixed with ambient air, leads to strong demand of safety measures and safety distances evaluation. Unconfined explosion of hydrogen-air mixture or high-pressure hydrogen tank rupture are the worst accident scenarios to be well predicted and mitigated or avoided, if possible. Thus, the analysis of existing data and the new experimental data on hydrogen-air and high-pressure hydrogen explosions are required to develop the safety recommendations and user guidelines for industry and technologies.

scholarly journals Adsorption between Quercetin Derivatives and β-Glucan Studied with a Novel Approach to Modeling Adsorption Isotherms

2020 ◽  
Vol 10 (5) ◽  
pp. 1637 ◽  
Author(s):  
Lidija Jakobek ◽  
Petra Matić ◽  
Šima Kraljević ◽  
Šime Ukić ◽  
Mirta Benšić ◽  
...  
Keyword(s):  
Linear Regression ◽  
Adsorption Isotherms ◽  
Spatial Arrangement ◽  
Experimental Results ◽  
Oh Groups ◽  
Quercetin Derivatives ◽  
Novel Approach ◽  
Non Linear ◽  
Modeling Of Adsorption

Interactions between polyphenols and fibers are important for polyphenol bioactivities, and have been studied in vitro with adsorption process and isotherms. However, the theoretical interpretations of adsorption potentially can be affected by the method of isotherm modeling. The aim was to study the interactions between β-glucan and quercetin derivatives (quercetin-3-glucoside, quercetin-3-galactoside, quercetin-3-rhamnoside) by studying adsorption, and to potentially improve the modeling of adsorption isotherms. Quercetin derivatives were determined by using spectrophotometric method. Experimental results were modeled with Langmuir, Dubinin-Radushkevich, and Hill isotherms using non-linear regression, linear regression, and improved non-linear regression. For improved non-linear regression, code in the R programming language was developed. All quercetin derivatives adsorbed onto the surface of β-glucan. Improved non-linear regression gave somewhat lower errors and may be the most appropriate for adsorption interpretation. According to isotherms obtained with improved regression, it may be suggested that adsorption is higher for rhamnoside and glucoside of quercetin than for quercetin-3-galactoside which agrees with experimental results. Adsorption could be a physical process. The spatial arrangement of hydroxyl (OH) groups on the glycoside part of quercetin could affect the adsorption. In conclusion, a novel approach using improved non-linear regression has been shown to be a useful, novel tool for adsorption interpretation.

High pressure hydrogen adsorption apparatus: Design and error analysis

2012 ◽  
Vol 37 (11) ◽  
pp. 9123-9136 ◽  
Author(s):  
Ali Qajar ◽  
Maryam Peer ◽  
Ramakrishnan Rajagopalan ◽  
Henry C. Foley
Keyword(s):  
High Pressure ◽  
Error Analysis ◽  
Hydrogen Adsorption ◽  
Apparatus Design ◽  
Pressure Hydrogen
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