Chemistry

1803 Submissions

[12] viXra:1803.0745 [pdf] submitted on 2018-03-31 08:11:42

Dozens of Adsorption Kinetic Models

Authors: Yong-Son Hong, Min-U Peak, Yong-Uk Ryu, Il-Hyoyk Kim, Hyok-Man Rim
Comments: 5 Pages.

The adsorption kinetics has been investigated for 120 years and the development of kinetic model has been proceeded in order to obtain the particular kinetic model which better agreed with the experimental data. As a result, dozens of adsorption kinetic models were established. The adsorption kinetic models are shown in a table.
Category: Chemistry

[11] viXra:1803.0666 [pdf] submitted on 2018-03-27 01:55:25

Kinetic Reevaluation on Uranium(vi) Adsorption[ind. Eng. Chem. Res. 2017, 56, 3251−3258 and 12745−12754] Using Deactivation Kinetics Model

Authors: Kwang-Il Paek, Hong-Chol Jin, Yong-Son Hong
Comments: 5 Pages.

In this work, the adsorption of uranium (VI) on alkali-activated leather waste and mesoporous carbon were reevaluated using deactivation kinetics model (DKM). As the result, the reaction order were newly calculated and the rate constants quantitatively compared on both adsorbates and adsorbent
Category: Chemistry

[10] viXra:1803.0400 [pdf] submitted on 2018-03-21 21:22:50

Evaluation of Activation Energies for Adsorption of Dyes by Modified Activated Carbons [J. Environ. Manage. 206 (2018) 170-177 and 383-397] Using Deactivation Kinetics Model

Authors: Yong-Son Hong, Wei-dong Chen
Comments: 6 Pages.

In this work, the acridine orange (AO) adsorption onto ZnO/almond shell activated carbon (ZnO-AC) and the rhodamine B (RB) onto magnetic CeO2 – activated carbon (CeO2 -AC) were reevaluated using deactivation kinetics model (DKM). As the result, the reaction order and the activation energies were newly calculated. Keywords: Adsorption, Kinetics, Modeling, Deactivation Kinetics Model
Category: Chemistry

[9] viXra:1803.0398 [pdf] submitted on 2018-03-21 23:21:41

Kinetic Reevaluation on Adsorption of Cu(ii), Cd(ii) and Pb(ii) Metal I Ons Over Functionalization of Polyacrylonitrile/na-Y-Zeolite[chem. Eng. J. 332 (2018) 727–736] Using Deactivation Kinetics Model

Authors: Yong-Son Hong
Comments: 4 Pages.

In this work, the adsorption of of Cu(II), Cd(II) and Pb(II) metal ions over functionalization of polyacrylonitrile/Na-Y-zeolite [Chem. Eng. J. 332 (2018) 727–736] was reevaluated using deactivation kinetics model (DKM). As the result, the reaction orders were newly calculated and rate constants were quantitatively compared on both adsorbates and adsorbent. Keywords: Adsorption Kinetic, Heterogeneous Reaction, Deactivation Kinetics Model
Category: Chemistry

[8] viXra:1803.0383 [pdf] submitted on 2018-03-21 04:03:18

Evaluation of Activation Energies on F Adsorption by Hydrous Zro2 Decorated Polyaniline Nanofibres [J. Colloid Interf. Sci. 508 (2017) 342– 358]

Authors: Yong-Son Hong
Comments: 4 Pages.

In this work, the F- adsorption on hydrous ZrO2 decorated polyaniline nanofibres (HZrO2@PANI NFs) published by Parashar et al. [J. Colloid Interf. Sci. 508 (2017) 342– 358] was reevaluated using deactivation kinetics model (DKM). As the result, the reaction order and the activation energies were newly calculated. Keywords: Adsorption, Kinetics, Modeling, Deactivation Kinetics Model
Category: Chemistry

[7] viXra:1803.0382 [pdf] replaced on 2018-03-21 21:28:29

Kinetic Reevaluation on Dyes Adsorption by Zeolite Imidazolate Framework-9 [ New J. Chem. 2018, 42, 717-724] Using Deactivation Kinetics Model

Authors: Yong-Son Hong
Comments: 6 Pages.

ABSTRACT The dyes adsorption on zeolitic imidazolate framework-9 (ZIF-9) published at New J. Chem. [2018, 42, 717-724 by Han et al. was reevaluated using deactivation kinetics model (DK M). As the result, the reaction orders, the activation energies were newly evaluated and the adsorption rate constants of each component were calculated and compared. Keywords: Adsorption Kinetics, Heterogeneous Reaction, Deactivation Kinetics Model
Category: Chemistry

[6] viXra:1803.0381 [pdf] replaced on 2018-04-13 08:35:12

Kinetic Reevaluation of the Competitive Adsorption [J. Hazard. Mater. 326 (2017) 211–220] Using Deactivation Kinetics Model

Authors: Yong-Son Hong
Comments: 6 Pages.

In this discussion, the competitive adsorption published by Fan et al. were reevaluated kineti cally using deactivation kinetics model. As the result, kinetic conclusions could be obtained as following. First, single component adsorption and binary component adsorption occur in different mechanisms. Second, the adsorption rate of one component can be calculated how times faster than the other in competitive system. Keywords: Adsorption Kinetic, Heterogeneous Reaction, Deactivation Kinetics Model
Category: Chemistry

[5] viXra:1803.0316 [pdf] submitted on 2018-03-20 03:44:05

Interpretation of the Longest C-C Bond Reported by Ishigaki et al

Authors: Raji Heyrovska
Comments: 2 pages, one Figure 1

The recently observed longest C-C bond of length 1.806 Å has been interpreted in this short article in terms of the Bohr radii of C and O, just when the hydroxyl groups break away from C by reduction with Zn. A figure drawn to scale has been presented.
Category: Chemistry

[4] viXra:1803.0278 [pdf] submitted on 2018-03-19 12:55:35

Charge Density Analysis Attending Bond Torsion: A Bond Bundle Case Study

Authors: Jordan Goss, Tim Wilson, Amanda Morgenstern, Mark Eberhart
Comments: 19 Pages.

For nearly a century chemical understanding has been tied to the properties of bonds, though more often than not, these bond properties are rooted in molecular orbital or valence bond representations of the electronic structure. Technological advances, however, are allowing for experimental measurements of the density via high resolution x-ray diffraction, while theoretical insights are opening the door to its direct calculation using fast and potentially versatile orbital free DFT methods. Capitalizing on these emerging tools without sacrificing hard won orbital derived understanding has spurred a search for density based representations that deliver the same information available from the orbital perspective. We show that recent extensions of the QTAIM formalism are useful as a means of recovering some of the bond properties that have become an intrinsic part of our chemical understanding. Specifically, we compute from the density the changing bond order accompanying the rotation about a double bond using the well-studied fulvene molecule as a test case. We compare the picture that emerges from this density based perspective with that stemming from molecular orbital approaches and argue that the two viewpoints are compatible.
Category: Chemistry

[3] viXra:1803.0096 [pdf] submitted on 2018-03-07 10:03:27

Numerical Recipe for Molecular Orbitals: Antisymmetric Polynomials, Infinitesimal Cubes and Monte Carlo Method.

Authors: Domenico Oricchio
Comments: 1 Page.

I try to obtain the ground state of complex molecules
Category: Chemistry

[2] viXra:1803.0055 [pdf] submitted on 2018-03-05 04:24:38

Some Basic Computational Aspects of Chemistry.

Authors: Johan Noldus
Comments: 5 Pages.

an alternative basis for atomic physics is presented allowing for semiclassical representations.
Category: Chemistry

[1] viXra:1803.0054 [pdf] submitted on 2018-03-05 04:33:59

Preparation of Hydrogen Peroxide by Electrochemical Method

Authors: Ri Kwang Il, Kim Dok Sung, Pak Chol Min, YongSon Hong
Comments: 6 Pages.

Nowadays all of the world most of hydroxide peroxide producing at industrial scale has been using as bleaching agent of light industry product such as paper, fibre et all, and the demand on it continuously has increased. Specially, in paper industry hydroxide peroxide not only bring about a substantial improvement of the quality of paper but also has no influence upon the human body and environment, and so is widely using as bleaching agent of hypochlorite. But for serious reasons on the use such as storage and transport of hydroxide peroxide in work shop is the main trend at present. We studied the preparation of hydrogen peroxide by a new and facile method based on cathodic reduction of oxygen with the gas diffusion type-oxygen electrode.
Category: Chemistry