Rational designation of electromagnetic interface for low-temperature CO2 reforming CH4.

A new approach for pectin extraction: Electromagnetic induction heating

Photocatalytic conversion of CH4 and CO2 to acetic acid over Cu/ZnO catalysts under mild conditions

Mathematical and computer simulation technology of condensate oil and gas wells stimulated by electromagnetic heating

From the status and history the of electromagnetic induction heating, the concept of electromagnetic induction heating, formulas and principles are briefly analyzed. There are some overviews of some examples: the furnace based on electromagnetic induction heating; the plastic processing based on electromagnetic induction heating; the temperature control system based on electromagnetic induction heating. Through these examples, the basic situation of domestic electromagnetic induction heating is summarized. Mining engineering safety detection plays a very important role in mining engineering. A mining safety detection model is designed by using electromagnetic induction heating principle for monitoring the load and the air temperature data. This detection reference model can be used for many areas for mining safety.

Plasma-assisted catalysis for CH4 and CO2 conversion

Thermodynamic analysis of dry reforming of CH4 with CO2 at high pressures

The electrohydrodynamic flow associated with a fluid drop in an electric field is a consequence of the tangential electric stress at the fluid interface. The tangential viscous stress due to the electrohydrodynamic flow arises to just balance the tangential electric stress at the fluid interface so that the traction boundary condition is satisfied. Influenced by both the local electric stress and viscous stress, the drop interface may exhibit various shapes. The presence of fluid flow also leads to charge convection phenomena. The relative significance of the charge convection effect is usually measured in terms of the electric Reynolds number, Re E , defined as the ratio of the timescales of charge convection by flow and that for charge relaxation by ohmic conduction. This work presents a quantitative analysis of the charge convection effects in a framework of the leaky dielectric model at finite Re E , which has not been considered in previous investigations. Axisymmetric steady flows driven by an applied uniform electric field about a deformable fluid drop suspended in an immiscible fluid are studied by computational means of the Galerkin finite–element method with supplementary asymptotic analysis. The results of finite–element computations are in general agreement with the prediction by the asymptotic analysis for spherical drops at vanishingly small Re E . A common effect of charge convection is found to reduce the intensity of electrohydrodynamic flow. As a consequence, oblate drops are predicted to be less deformed in an electric field when charge convection is taken into account. The prolate drops are often associated with an equator–to–pole flow, which convects charges toward the poles to form a charge distribution resembling that in a highly conducting drop immersed in an insulating medium. Therefore, charge convection tends to enhance the prolate drop deformation. In many cases, charge convection effects are found to be significant even at apparently small Re E , corresponding to the charge relaxation time–scale about 10 −3 s, suggesting that many experimental results reported in the previous publications could have been influenced by charge convection effects.

The effects of process parameters on carbon dioxide reforming of methane over Co–Mo–MgO/MWCNTs nanocomposite catalysts

Dry reforming of CH4[sbnd]CO2 in AC rotating gliding arc discharge: Effect of electrode structure and gas parameters

The SiO2-Al2O3 fiber composites had been successfully prepared by the combination technique of electrospinning and sol-gel method. The effects of Al2O3 contents (1, 2, 3, 4 and 5%wt) on fiber diameter and morphology were investigated by SEM. It was observed that alumina content significantly influenced the average diameter of fiber which increased by increasing the alumina content. The prepared fiber composites were used as a support for cobalt (Co)-based catalysts for Fischer–Tropsch synthesis (FTS). The FTS performances over the fiber and porous catalysts were carried out in a fixed bed reactor at 280°C, 1 atm, and H2/CO of 2. The results showed that the fiber catalysts were easily reduced when comparing the porous catalyst. The fiber catalysts showed the activity at the same level of the porous catalyst, but their advantage was the lower water gas shift reaction which produced less CO2 than the porous catalyst. The CO conversion was 59.62% with the fiber catalyst and 52.80% with the porous catalyst under the same experimental condition. The fiber catalyst gave the maximum methane selectivity of 96.08% compared to the porous catalyst (85.63%).

Utilization of CO2 for syngas production by CH4 partial oxidation using a catalytic membrane reactor

A study on CO2 and CH4 conversion to synthesis gas and higher hydrocarbons by the combination of catalysts and dielectric-barrier discharges

Managing the substantial NOx emissions during the cold start of diesel vehicles presents a critical environmental challenge. Enhancing the conversion of NO to NO2 at low temperatures can significantly improve the efficiency of diesel aftertreatment systems. Manganese-based mullite catalysts are cost-effective and promising for NO oxidation; however, their low-temperature activity requires further enhancement. In this study, we innovatively leverage the strong electronic interactions between Mn3O4 and YMn2O5 to enhance the low-temperature NO oxidation activity (50% at 200 °C) of Mn3O4/YMn2O5, demonstrating high activity (CO conversion: T100 = 222 °C, C3H6 conversion: T100 = 209 °C, C3H8 conversion: T100 = 341 °C, NO maximum conversion: 78.7% at 300 °C) and stability (CO and C3H6 conversion: 100%, C3H8 conversion: 94.06%, NO conversion: 78.7% at 300 °C for 10 h) under a simulated exhaust gas mixture. Structural analysis (X-ray diffraction (XRD), Raman, and transmission electron microscopy (TEM)) confirmed the uniform coexistence of Mn3O4 and YMn2O5 phases. Furthermore, X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) indicated that Mn3O4 decreased the average Mn valence state, increased Mn-Mn interactions, and modified Mn-O coordination, contributing to improved catalytic performance. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations further revealed that Mn3O4/YMn2O5 enhances electron transfer to adsorbed O2, reducing its dissociation energy barrier and destabilizing nitrite intermediates, thereby accelerating the Eley-Rideal (E-R) mechanism for NO oxidation.

Hydrogen production from biogas reforming and the effect of H2S on CH4 conversion

Understanding CO2 reduction via reverse water-gas shift triggered by electromagnetic induction at moderate condition