scholarly journals Carbon Dioxide Conversion of Methane into Synthesis-Gas on Glass Cloth Catalysts

2010 ◽  
Vol 12 (2) ◽  
pp. 97 ◽  
Author(s):  
G. Aldashukurova ◽  
A.V. Mironenko ◽  
Z.A. Mansurov ◽  
N.A. Rudina ◽  
A.V. Itshenko ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Active Component ◽  
Glass Cloth ◽  
Carbon Dioxide Conversion ◽  
Solution Combustion ◽  
Ni Catalysts ◽  
Physico Chemical ◽  
Conversion Of Methane ◽  
Co Concentration ◽  
The Matrix

The catalytic activity of nanostructurized low per cent (1%) Co-Ni catalysts on the basis of glass cloth, obtained by “solution combustion” (SC) method, in the reaction of carbon dioxide of methane was studied. The physico - chemical characteristics of the obtained species were studied by the methods of X-ray phase analysis, SEM, TEM, TGA. It is found that SC method allows to obtain an active component on the surface of glass cloth in the form of nanopaticles. A high activity of the catalyst, the active component of which is cobalt, is revealed; the decrease in Co concentration in the matrix of glass cloth results in the decrease of activity in the reaction of carbon dioxide conversion of methane.

scholarly journals Preparation of synthesis gas by methane dry reforming on fiberglass catalysts

2018 ◽  
pp. 28-38
Author(s):  
Zhanar Kudyarova ◽  
Anatoly Mironenko ◽  
Asel Kazieva ◽  
V. Аntonuk ◽  
Zulkhair Mansurov
Keyword(s):  
Carbon Dioxide ◽  
Synthesis Gas ◽  
Phase Method ◽  
Carbon Dioxide Conversion ◽  
Active Components ◽  
Solution Combustion ◽  
X Ray ◽  
Co Catalysts ◽  
Lanthanum Phosphate ◽  
Conversion Of Methane

The application field of materials based on lanthanum orthophosphate (LaPO4) including nanomaterials, has been permanently extending recently. The high level of mechanical properties and the compatibility with numerous oxides make it possible to consider the possibility of using lanthanum orthophosphate as a composite material for construction purposes. This application is particularly promising when nanoparticles with quasi-1D morphology (nanorods) are used. The high isomorphic capacity of the LaPO4-based phase for alkaline-earth ions and ions of lanthanides and actinides, high chemical stability, and high radiation hardness make promising the application of this compound as a matrix for immobilization of radioactive wastes. The possibility of obtaining lanthanum phosphate (LaPO4) by the hydrothermal method is considered in the work. Effects of pH, temperature and time of processing of hydrothermal synthesis on the morphology and structure of monostructured lanthanum phosphate are studied. It has been established that, with the increase of pH, the morphology of phosphate changed, the size of the crystallites increased, while the crystal structure changed from hexagonal to monoclinic. The catalytic activity of nanostructured low-percentage Mg-Ni-Co-catalysts based on high-temperature KT-11-TO grade fiberglass obtained by “solution combustion” (SC) method was studied at carbon dioxide conversion of methane (CDCM). The physico-chemical characteristics of samples were studied using X-ray diffraction phase analysis, temperature-programmed reduction (TPR) and transmission electron microscopy (TEM). The X-ray phase method showed the formation of several phases during the synthesis: NiCo2O4, 3CoO·5NiO, MgO, and Co3O4. According to TEM, active catalyst particles have a size of 5-10 nm proving the nanoscale size of the active component. TPR method showed the shift of maximum hydrogen absorption to higher temperatures. Apparently, it occurs due to the interaction of the active components with the carrier till the new phase formation. On the basis of the gas chromatographic analysis the high activity of fiberglass catalysts at the carbon dioxide conversion of methane into synthesis gas with a conversion of the initial components close to ~ 100% was disclosed. The optimal technological conditions for the CDCM process were established – a temperature in the range of 850-900°С, the volumetric rate of initial reactants 4000-10000 h-1 with a ratio of methane to carbon dioxide equal to 1.

Effect of MoO3 on the Catalytic Properties of NiO/Al2O3 in the Carbon Dioxide Conversion of Methane

2019 ◽  
Vol 55 (2) ◽  
pp. 137-142 ◽  
Author(s):  
K. Dossumov ◽  
G. E. Ergazieva ◽  
L. K. Myltykbaeva ◽  
M. M. Telbaeva ◽  
A. T. Batyrbaev
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Properties ◽  
Carbon Dioxide Conversion ◽  
Conversion Of Methane

New Mixed Perovskite-Like Catalysts Gd2–xSr1+xFe2O7 for Carbon Dioxide Conversion of Methane and for Production of Light Olefins

2017 ◽  
Vol 17 (1) ◽  
pp. 51-59
Author(s):  
T. F. Sheshko ◽  
T. A. Kryuchkova ◽  
Yu. M. Serov ◽  
I. V. Chislova ◽  
I. A. Zvereva
Keyword(s):  
Carbon Dioxide ◽  
Light Olefins ◽  
Carbon Dioxide Conversion ◽  
Conversion Of Methane

scholarly journals Dry Reforming of Methane on Carriers and Oxide Catalysts to Synthesis-Gas

2018 ◽  
Vol 20 (2) ◽  
pp. 131 ◽  
Author(s):  
K. Dossumov ◽  
Y. Yergaziyeva ◽  
L. Myltykbayeva ◽  
M. Telbayeva
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
Synthesis Gas ◽  
Space Velocity ◽  
Dry Reforming Of Methane ◽  
Carbon Dioxide Conversion ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Conversion Of Methane ◽  
Al2o3 Catalyst

The catalytic activity of carriers: θ‒Al2O3, γ‒Al2O3, 5A, 4A, 3A and 13X and the oxides of metals of variable valency ‒ NiO, La2O3, CuO, MoO3, MgO, V2O5, WO3, CoO, Cr2O3, ZnO, ZrO2, CeO2, Fe2O3, supported on the effective carrier γ‒Al2O3 by the method of capillary impregnation of the support with solutions of nitric salts of metals were investigated in the process of carbon dioxide conversion of methane (DRM). The optimal technological regimes for the process were: the reaction temperature -800 °C, the space velocity of the initial reactants ‒ 1500 h-1 with a methane to carbon dioxide ratio equal to 1. It was found that among the studied catalysts the highest activity is shown by the NiO/γ‒Al2O3 catalyst, where the yields of hydrogen and carbon monoxide reaches 45.4 and 42.4% by volume, respectively, when methane conversion is 89%. The XRF method showed that the content of alumina and nickel oxide after the reaction remained unchanged at 96.7 and 3.0%, respectively. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), small angle X-ray scattering (XRS) determined that nickel-containing NiO/γ‒Al2O3 catalyst form nickel nanoparticles (6.4‒10 and 50‒150 nm) and a uniform their distribution on the surface of the carrier takes place. These physical chemical characteristics have a positive effect on the activity of NiO/γ‒Al2O3 catalyst in the process of carbon dioxide conversion of methane to synthesis gas.

A review on recent developments in solar photoreactors for carbon dioxide conversion to fuels

2021 ◽  
Vol 47 ◽  
pp. 101515 ◽  
Author(s):  
Angel Francis ◽  
Shanmuga Priya S. ◽  
Harish Kumar S ◽  
Sudhakar K ◽  
Muhammad Tahir
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Conversion ◽  
Recent Developments

scholarly journals Microencapsulation of Flaxseed Oil—State of Art

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 295
Author(s):  
Asma Yakdhane ◽  
Sabrine Labidi ◽  
Donia Chaabane ◽  
Anita Tolnay ◽  
Arijit Nath ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Gum Arabic ◽  
Tween 80 ◽  
Flaxseed Oil ◽  
Review Article ◽  
Wall Material ◽  
Physico Chemical ◽  
Comprehensive Information ◽  
The Matrix

Microencapsulation is a well-known technology for the lipid delivery system. It prevents the oxidation of fatty acids and maintains the quality of lipid after extraction from oil seed and processing. In flaxseed oil, the amount of ω-3 and ω-6 polyunsaturated fatty acids are 39.90–60.42% and 12.25–17.44%, respectively. A comprehensive review article on the microencapsulation of flaxseed oil has not been published yet. Realizing the great advantages of flaxseed oil, information about different technologies related to the microencapsulation of flaxseed oil and their characteristics are discussed in a comprehensive way, in this review article. To prepare the microcapsule of flaxseed oil, an emulsion of oil-water is performed along with a wall material (matrix), followed by drying with a spray-dryer or freeze-dryer. Different matrices, such as plant and animal-based proteins, maltodextrin, gum Arabic, and modified starch are used for the encapsulation of flaxseed oil. In some cases, emulsifiers, such as Tween 80 and soya lecithin are used to prepare flaxseed oil microcapsules. Physico-chemical and bio-chemical characteristics of flaxseed oil microcapsules depend on process parameters, ratio of oil and matrix, and characteristics of the matrix. As an example, the size of the microcapsule, prepared with spray-drying and freeze-drying ranges between 10–400 and 20–5000 μm, respectively. It may be considered that the comprehensive information on the encapsulation of flaxseed oil will boost the development of functional foods and biopharmaceuticals.

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