Methane gas, as one of the major biogases, is a potential source of renewable energy for power production. Biochar can be readily used to purify biogas contaminants such as H2S and CO2. This study assessed the adsorption of CH4, H2S, and CO2 onto four different types of biochars. The adsorption dynamics of biochars were investigated in a fixed-bed column, by determining the breakthrough curves ...

One of the strategic goals of the modern automobile manufacturing industry is to replace gasoline and diesel with alternative fuels such as natural gas. In this report, we elucidate the desired characteristics of an optimal adsorbent for gas storage. The U.S. Department of Energy has outlined several requirements that adsorbents must fulfill for natural gas to become economically viable, with a...

The knowledge gap on adsorption of complex mixtures in the literature relative to single component data represents a persistent obstacle developing accurate process models for separations. collection mixed gas is an imminent need improved understanding behavior adsorbent systems these diverse applications. Current approaches mixture using predictive theories based pure experiments often fail ca...

The oxygen/silver system exhibits unique catalytic behavior for several large-scale oxidation ~and partial oxidation! industrial processes. In spite of its importance, very little is known on the microscopic level concerning the atomic geometry and chemical nature of the various O species that form. Using densityfunctional theory within the generalized gradient approximation, the interaction be...

Please cite this article in press as: J. Moellmer e In order to explore the potential of novel open metal organic frameworks (MOFs) with soc topology for gas storage applications, we performed a systematic physical adsorption study with Hydrogen, Methane and Carbon dioxide as adsorptives over a wide range of temperatures (77–323 K) and pressures (0– 5 MPa) by using a volumetric low pressure ads...

The typical result of gas phase chemical investigations on a one-atom-at-a-time level are standard adsorption enthalpies (∆Hads) of chemical species on stationary chromatographic surfaces. The standard adsorption enthalpies are deduced from experimental results using either the model of linear gas chromatography assuming mobile adsorption [1] or Monte-Carlo based models [2]. The obtained enthal...

There are many existing and prospective applications for gas adsorption by nanoporous materials. Activated carbons and zeolites, for example, are widely used to purify and separate industrial gases, while newer materials, such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs) and microporous organic polymers, have the potential to store hydrogen and methane for use as alter...

In this work, molecular dynamics (MD) was performed to simulate the dynamic processes of 1:4 acetone/nitrogen permeating through different Al2O3 membranes by Materials Studio 2.2 software package. Three modeling systems were constructed applying different modeling box lengths as well as different hollow size and texture of Al2O3 membranes to compare different permeation behaviors. In each syste...

A procedure for determining the structure of vapour and gas adsorbates that is based on the Zeta adsorption isotherm is reported. For vapours and for gases, this isotherm supposes that an adsorbate consists of particle clusters with the number of particles in a cluster denoted ζ, where ζ can be 1, 2, 3… up to a maximum of ζm, and predicts the isotherm constants are independent of pressure. For ...

The electron shell structure of superheavy elements, i.e., elements with atomic number Z ≥ 104, is influenced by strong relativistic effects caused by the high Z. Early atomic calculations on element 112 (copernicium, Cn) and element 114 (flerovium, Fl) having closed and quasi-closed electron shell configurations of 6d(10)7s(2) and 6d(10)7s(2)7p1/2(2), respectively, predicted them to be noble-g...