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.

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 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.

Chemical Recovery Processes of CO2

2021 ◽  
Vol 25 (12) ◽  
pp. 30-37
Author(s):  
L.G. Pinaeva ◽  
A.S. Noskov
Keyword(s):  
Carbon Dioxide ◽  
Synthesis Gas ◽  
Methanol Synthesis ◽  
Dimethyl Carbonate ◽  
Chemical Recovery ◽  
Target Product ◽  
Stable Carbon ◽  
Carbon Dioxide Conversion ◽  
Recovery Processes ◽  
Motor Fuels

Existing (production of urea, dimethyl carbonate, polypropylene carbonate) and promising (production of methanol, synthesis gas, monomers dedicated to synthesis of polyurethanes and polycarbonate) chemical technologies which any, time soon, may become CO2 based economy for producing motor fuels and basic chemicals have been overviewed. Based on estimates of CO2 removals in these processes, it has been concluded that there is a potential for developing technologies to produce methanol from CO2 to a competitive cost of the target product. It is expected that interest in this process will decrease if stable carbon dioxide conversion catalysts for methane are introduced into the market.

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

scholarly journals Galvanic Exchange as a Novel Method for Carbon Nitride Supported CoAg Catalyst Synthesis for Oxygen Reduction and Carbon Dioxide Conversion

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 860 ◽  
Author(s):  
Roshan Nazir ◽  
Anand Kumar ◽  
Sardar Ali ◽  
Mohammed Ali Saleh Saad ◽  
Mohammed J. Al-Marri
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Nitride ◽  
Reduction Reaction ◽  
Partial Replacement ◽  
Carbon Dioxide Conversion ◽  
X Ray ◽  
Bimetallic Alloy

A bimetallic alloy of CoAg nanoparticles (NPs) on a carbon nitride (CN) surface was synthesized using a galvanic exchange process for the oxygen reduction reaction (ORR) and carbon dioxide electrocatalytic conversion. The reduction potential of cobalt is ([Co2+(aq) + 2e− → Co(s)], −0.28 eV) is smaller than that of Ag ([Ag+(aq) + e− → Ag(s)], 0.80 eV), which makes Co(0) to be easily replaceable by Ag+ ions. Initially, Co NPs (nanoparticles) were synthesized on a CN surface via adsorbing the Co2+ precursor on the surface of CN and subsequently reducing them with NaBH4 to obtain Co/CN NP. The Co NPs on the surface of CN were then subjected to galvanic exchange, where the sacrificial Co atoms were replaced by Ag atoms. As the process takes place on a solid surface, only the partial replacement of Co by Ag was possible generating CoAg/CN NPs. Synthesized CoAg/CN bimetallic alloy were characterized using different techniques such as powder x-ray diffraction (PXRD), x-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and electron diffraction spectroscopy (EDS) to confirm the product. Both the catalysts, Co/CN and CoAg/CN, were evaluated for oxygen reduction reaction in 1M KOH solution and carbon dioxide conversion in 0.5 M KHCO3. In the case of ORR, the CoAg/CN was found to be an efficient electrocatalyst with the onset potential of 0.93 V, which is comparable to commercially available Pt/C having Eonset at 0.91 V. In the electrocatalytic conversion of CO2, the CoAg/CN showed better performance than Co/CN. The cathodic current decreased dramatically below −0.9V versus Ag/AgCl indicating the high conversion of CO2.

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

Production of synthesis gas by conversion of methane in a steam-carbon dioxide plasma

2014 ◽  
Vol 40 (9) ◽  
pp. 725-729 ◽  
Author(s):  
Ph. G. Rutberg ◽  
A. N. Bratsev ◽  
V. A. Kuznetsov ◽  
G. V. Nakonechnyi ◽  
A. V. Nikonov ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Synthesis Gas ◽  
Conversion Of Methane ◽  
Carbon Dioxide Plasma

Catalytic conversion of methane to synthesis gas over europium iridate, Eu2Ir2O7: Anin situ study by x-ray diffraction and mass spectrometry

1991 ◽  
Vol 8 (2-4) ◽  
pp. 169-174 ◽  
Author(s):  
Richard H. Jones ◽  
Alexander T. Ashcroft ◽  
David Waller ◽  
Anthony K. Cheetham ◽  
John M. Thomas
Keyword(s):  
Mass Spectrometry ◽  
Synthesis Gas ◽  
Catalytic Conversion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Conversion Of Methane
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