scholarly journals CO2 Utilization For Mechanochemical Carbonation Of Celestine

2015 ◽  
Vol 61 (3) ◽  
pp. 20-23 ◽  
Author(s):  
Erika Turianicova
Keyword(s):  
Infrared Spectroscopy ◽  
Ball Mill ◽  
High Energy ◽  
Planetary Ball Mill ◽  
Co2 Utilization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Characterization Techniques ◽  
One Step ◽  
Ft Ir

Abstract Natural celestine (SrSO4) has been succesfully transformed into strontianite (SrCO3) via fast one-step mechanochemical carbonation utilizing gaseous CO2. The process was realized in the environment enriched with LiOH or NaOH additives. The mixtures were milled in a high-energy planetary ball mill for 40 min. The phases formed during the milling were characterized by different characterization techniques, such as X-ray diffraction (XRD) and infrared spectroscopy (FT-IR). The presence or absence of carbon or sulphur in the products was confirmed by a CHNS analysis.

One Step Synthesis and Characterization of Zirconia-Graphene Composites

2012 ◽  
Vol 600 ◽  
pp. 174-177 ◽  
Author(s):  
Jian Fei Xia ◽  
Zong Hua Wang ◽  
Yan Zhi Xia ◽  
Fei Fei Zhang ◽  
Fu Qiang Zhu ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Graphene Composite ◽  
Transmission Electron ◽  
One Step ◽  
Ft Ir ◽  
Xrd Techniques

Zirconia-graphene composite (ZrO2-G) has been successfully synthesized via decomposition of ZrOCl2•6H2O in a water-isopropanol system with dispersed graphene oxide (GO) utilizing Na2S as a precursor could enable the occurrence of the deposition of Zr4+ and the deoxygenation of GO at the same time. Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) techniques were used to characterize the samples. It was found that graphene were fully coated with ZrO2, and the ZrO2 existing in tetragonal phase, which resulted in the formation of two-dimensional composite.

Ball-Milling Stimulated Mechanochemical Processes in the System “Titanium-Toluene”

2019 ◽  
Vol 946 ◽  
pp. 351-356 ◽  
Author(s):  
Olga M. Kanunnikova ◽  
V.V. Aksenova ◽  
G.A. Dorofeev
Keyword(s):  
Ball Milling ◽  
Mechanical Energy ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Liquid Phases ◽  
Ft Ir ◽  
Titanium Powders ◽  
Solid Phases ◽  
Ft Ir Spectroscopy

The present work deals with the investigation of the transformations of the solid and liquid phases at high energy planetary ball milling of toluene together with titanium powder. The sequence of structural toluene transformations using FT-IR spectroscopy was investigated. Phase constitutions and morphology of ball milled titanium powders were studied by X-ray diffraction and scanning electron microscopy. It is shown that mechanically induced destruction of toluene occurs by the mechanism of catalytic cracking. During ball milling, concentration of aromatic hydrocarbons in the liquid phase decreases, at the same time the content of alkenes, cycloalkanes, and isoalkanes increases. The main solid products of the mechanosynthesis were cubic and hexagonal titanium carbo-hydrides.Evolution of lattice parameters, crystallites sizes, and micro-stresses of the solid phases during ball milling as a function of the mechanical energy dose have been discussed.

Dissolution and Regeneration of Reed Leaf Fibers in Imidazole-Based Ionic Liquids

2013 ◽  
Vol 652-654 ◽  
pp. 1539-1542
Author(s):  
Hou Jie Zhao ◽  
Chun Yan Wei ◽  
Yong Zhu Cui ◽  
Li Hua Lv ◽  
Xiao Wang
Keyword(s):  
Fourier Transform ◽  
Ionic Liquids ◽  
Infrared Spectroscopy ◽  
Chloride Solution ◽  
X Ray Diffraction ◽  
Cellulose I ◽  
X Ray ◽  
High Temperature And Pressure ◽  
Ft Ir ◽  
Temperature And Pressure

In this paper, regeneration of reed leaf fibers that have been degummed pretreatment in high temperature and pressure dissolved in 1-butyl-3-methylimidazolium chloride ionic liquids was studied. The samples containing 5% or 10%(wt/wt)reed leaf fibers in the ionic liquids, at 90°C for 7h.The dissolution process was viewed by polarizing microscope. Fourier-transform infrared spectroscopy(FT-IR) and X-ray diffraction were used to visualize the crystalline of reed leaf fiber transformed completely from cellulose I to cellulose Ⅱ after regenerated directly from 1-butyl-3-methylimidazolium chloride solution.

Characterization Techniques For Laser-Annealed Polysilicon on Insulating Layers

1980 ◽  
Vol 1 ◽  
Author(s):  
J. T. Schott ◽  
J. J. Comer
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
High Energy ◽  
High Energy Electron ◽  
X Ray Diffraction ◽  
X Ray ◽  
Characterization Techniques ◽  
Cw Laser ◽  
Transmission Electron ◽  
Scanning Electron

ABSTRACTVarious characterization techniques are applied to pulsed and cw laser-annealed polysilicon layers deposited on oxide layers. The results are used to compare these techniques as to the type and completeness of information provided, as well as sample preparation requirements and general ease or difficulty of measurement. The techniques employed include scanning electron microscopy (SEM), electron channeling micrographs and selected area channeling patterns (SACP), reflection (high energy) electron diffraction (RHEED), transmission electron microscopy (TEM) and selected area diffraction (SAD), x-ray diffraction, optical techniques and etching techniques.

Influence of Organoclay on the Physical Properties of Polyethylene Nanocomposites

2006 ◽  
Vol 530-531 ◽  
pp. 709-714 ◽  
Author(s):  
Edcleide Maria Araújo ◽  
Amanda D. de Oliveira ◽  
Renata Barbosa ◽  
Tomás Jefférson Alves de Mélo
Keyword(s):  
Mechanical Properties ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
Polyethylene Matrix ◽  
X Ray ◽  
Ft Ir

In this work, polyethylene/montmorillonite clay nanocomposites were produced by melt intercalation. The clays were treated with quaternary ammonium salts and then treated and untreated clays were introduced in polyethylene. The clays were characterized by X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR). The nanocomposites were characterized by mechanical and flammability properties. The results showed that the mechanical properties were improved by introduction of organoclay in polyethylene matrix. By adding only 3wt% montmorillonite, the burning rate of the nanocomposites was reduced by 17% in relation to PE matrix.

Nanocrystalline Intermetallic Mg2Ni Produced in a Batch Scale Mill

2006 ◽  
Vol 509 ◽  
pp. 141-146
Author(s):  
E. Martínez-Franco ◽  
Thomas Klassen ◽  
Rüdiger Bormann ◽  
D. Jaramillo-Vigueras
Keyword(s):  
Ball Mill ◽  
Energy Dispersive Spectrometry ◽  
Particle Morphology ◽  
High Energy ◽  
X Ray Diffraction ◽  
Batch Production ◽  
Production Scale ◽  
X Ray ◽  
Powder Mass ◽  
Scanning Electron

Nanocrystalline intermetallic Mg2Ni is successfully produced on a batch production scale from elemental powder blends by mechanical alloying using a high-energy rotor ball mill (Simoloyer). Different ball-to-powder mass ratios are used in order to provide results for scaling to industrial production. Transformation of elemental Mg-Ni powders into the Mg2Ni intermetallic is observed by x-ray diffraction. Particle morphology during milling is observed by scanning electron microscopy. A relatively low Fe contamination is estimated by energy dispersive spectrometry.

Synthesis of Alumina Powders by Mechanical Activation

2006 ◽  
Vol 530-531 ◽  
pp. 655-660
Author(s):  
Adriana Scoton Antonio Chinelatto ◽  
C. Lago ◽  
S.R.M. Antunes ◽  
A.C. Antunes ◽  
Osvaldo Mitsuyuki Cintho ◽  
...  
Keyword(s):  
Pechini Method ◽  
High Energy ◽  
Alumina Ceramics ◽  
X Ray Diffraction ◽  
Electrical And Optical Properties ◽  
X Ray ◽  
Aluminum Nitrate Nonahydrate ◽  
Ft Ir ◽  
Reactive Alumina ◽  
Nitrate Nonahydrate

Alumina is utilized in many areas of modern industry because of its unique mechanical, electrical and optical properties. Various methods are been employed for produce alumina for different end uses. The preparation of fine and sintering-reactive alumina powders is probably one of the most important steps for production alumina ceramics with controlled microstructure. In this work, it was studied the production of alumina powders by “Pechini” method associated to highenergy milling. For this, it was prepared the resin by Pechini method, using aluminum nitrate nonahydrate. This resin was calcined at 500oC. Then, the calcined powders were submitted a high energy milling for different times. The powders mechanically activated were characterized by x ray diffraction, FT-IR and scanning electronic microscopic. After milling, the powders were calcined at 900oC. The results showed that the alumina phase transitions and powders characteristics were modified when the step of activation mechanical was introduced.

Synthesis and Characterization of Polyaniline Copolymer

2012 ◽  
Vol 217-219 ◽  
pp. 551-554
Author(s):  
Ting Xi Li ◽  
Yu Hua Zhao ◽  
Qian Li ◽  
Cheng Qian Yuan ◽  
Quan Liang Chen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
The Difference ◽  
Thermal Stability Of

Abstract. Polyaniline (PANI) and p-phenylenediamine (p-PDA)-aniline copolymer were prepared via a same microemulsion method. The structures of the PANI and p-PDA-aniline copolymer were characterized by infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis（TGA）. The results revealed the difference of synthesis and characterization between PANI and p-PDA-aniline copolymer. It was shown that structure of the copolymer is almost similar to that of PANI, but the p-PDA-aniline copolymer has a better crystallization than PANI, and the thermal stability of the copolymer is higher than that of pure PANI.

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