Renewable Revolution
Energy => Renewables => Topic started by: AGelbert on August 28, 2015, 09:14:30 pm
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Research Article
High-Pressure Hydrogen Adsorption in the Zeolites: A Grand Canonical Monte Carlo Study
Xiuying Liu, Jie He, and Rui Li
College of Science, Henan University of Technology, Henan, Zhengzhou 450001, China
Received 22 April 2012; Accepted 15 June 2012
Academic Editors: F. E. Little and R. P. Saini
Copyright © 2012 Xiuying Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
SNIPPET 1:
Hydrogen storage is a key enabling technology for the extensive use of hydrogen as an energy carrier. The aim is to develop economically and environmentally attractive solutions for storage options. Therefore, a number of novel storage techniques are being investigated to complement the currently available methods.
SNIPPET 2:
Zeolites are aluminosilicate crystals extensively used in industrial applications involving separation, adsorption, or preferential adsorption of gases [9]. These applications have motivated theoretical and experimental works devoted to the measurement and computation of the adsorption of simple gases or complex molecular fluids on these materials.
Numerical simulations have been realized using a sound model of the interactions between the zeolite crystal and gas molecules, with the aim of evaluating the possibility of computing the amount of gas adsorbed at a given pressure and temperature with acceptable precision.,
The objective of the present work is concerned with the adsorption of H2 on the different zeolites. Here, we have investigated three zeolites with different channel diameters and pore volumes. The physisorption properties of hydrogen molecules on RHO, ZON, and CHA zeolites have been simulated employing GCMC method. Figure 1 shows a schematic drawing of the zeolite pore structure investigated [10].
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SNIPPET 3:
The results show that the physisorption properties of CHA zeolite are superior to those of ZON zeolite at all conditions. The reasonable theoretical explanations are given by calculating the isosteric heats of adsorption at the different temperatures.
http://www.hindawi.com/journals/isrn/2012/491396/
Hydrogen Storage for Energy Application
Rahul Krishna, Elby Titus*, Maryam Salimian, Olena Okhay, Sivakumar Rajendran and Jose Gracio Nanotechnology Research Division (NRD), Centre for Mechanical Technology and Automation (TEMA), Dept. of Mechanical Engineering, University of Aveiro, Portugal
J. M. G. Sousa, A. L. C. Ferreira and Ananth Rajkumar
Department of Physics& I3N, University of Aveiro, Portugal
Joćo Campos Gil
Department of Physics, University of Coimbra, Portugal[/i
SNIPPET 1:
Zeolites contain well defined open-pore structure, with often tunable pore size, and show notable guest-host chemistry, with important applications in catalysis, gas adsorption, purification and separation [33]. Additionally, this material is cheap and has been widely used in industrial processes for many decades.
The extensive experimental survey depicts the hydrogen storage capacity of zeolites to be <2 wt% at cryogenic temperatures and <0.3 wt% at room temperatures and above [34].
SNIPPET 2:
Figure 7 shows that the structure of these minerals is most commonly based on a framework of alternating AlO4 and SiO4 species, with charge balancing (hydroxyl or cationic) entities, forming networks of cavities, channels and openings of varying dimensions [35].
SNIPPET 3:
The hydrogen revolution following the industrial age has just started. Hydrogen
production, storage and conversion have reached a technological level although plenty of improvements and new discoveries are still possible.
http://cdn.intechopen.com/pdfs-wm/38711.pdf