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In this paper, we compare 4D seismic interpretations of CO2 plume evolution with fluid-flow numerical simulation results for Cranfield, Mississippi. Historic pressure trends, oil and gas production rates, and current CO2-EOR production data from the field were history matched, and a tuned model was used for predictive simulations.For CO2-EOR operations, numerical simulation results of the CO2 plume...
The pre-mixed methane–air catalytic combustion on platinum is numerically modeled in steady condition. The aim of work goes to better understand how the operation and wall parameters affect the combustion of methane, especially the extinction, Pt(s) coverage and hot spot. For this purpose, a micro flatbed channel for pre-mixed methane–air catalytic combustion is investigated. It is clearly shown through...
Underground methane-rich and combustion-prone longwall mining gobs are usually subjected to the symbiotic thread between coal gas and combustion disasters. Quantitative understanding of this symbiosis is essential to mitigate these potential disasters. However, previous mathematical models mainly focused on the simulation disaster of coal gas flow in gobs or spontaneous combustion, less attention...
The main purpose of this study is to improve the numerical evaluation of gas injection enhanced coalbed methane (ECBM) recovery by establishing a new mathematical coalbed methane (CBM) simulation model, in which the two-dimensional Peng–Robinson equation of state (2D PR EOS) model and the Maxwell-Stefan bidisperse pore diffusion (MS-BPD) model for multicomponent gas adsorption and diffusion are implemented...
A comprehensive model with time limited wall reaction was developed for the simulation of complex gas particle molten slag three-phase reactions and flow processes in an entrained flow gasifier. Promotional conversion rate, wall reaction time and particle size/density evolution have been considered in the wall reaction model. In order to validate the proposed model, an industrial single swirling burner...
Self-ignition of coal dust deposits poses a higher risk of fires in oxygen-enriched oxy-fuel combustion systems. In this work, we develop a numerical method, using the commercial software COMSOL Multiphysics, to investigate self-ignition behaviour of coal dust accumulations with a main emphasis on the roles of oxygen, diluent gas and dust volume. A one-step 2nd-order reaction kinetic model considering...
Experimental and numerical techniques have been developed to evaluate performance of CO2 huff-n-puff processes for unlocking resources from the Bakken tight oil formations. Experimentally, a series of coreflooding tests have been conducted by using core samples collected from the Bakken tight formation with a permeability range of 0.27–0.83mD. The performance of four recovery schemes (i.e., waterflooding,...
Preformed Particle Gel (PPG) surfactant combined flooding, designed to simultaneously improve the sweep efficiency and displacement efficiency, has emerged as a promising Enhanced Oil Recovery (EOR) method after polymer flooding. The fundamental mechanisms have been investigated by many lab experiments and the feasibility has been evaluated by some field applications. However, there is no model that...
The paper presents a wide campaign of numerical simulations carried out subsequently to the formalization and the implementation in Matlab of a steady state-zero-dimensional numerical model. It describes the various processes of a global self sustained Indirect Internal CO2 Reforming Solid Oxide Fuel Cell System fed with biogas. The plant considered includes a thermo-electrochemical section in which...
Steam injection can significantly reduce the viscosity of heavy oil. In addition to physical effects, chemical reactions such as aquathermolysis also make a difference. However, the current numerical simulators do not include the characterization for the aquathermolysis reactions, making it unable to analyze directly the effect of the aquathermolysis reactions using numerical simulation. To solve...
Formation water intrusion into the coal seam through cross drainage boreholes seriously affects the gas extraction efficiency. Particularly in the downward boreholes, the formation water cannot be discharged through the drain. Using the conventional seepage model to estimate the effect of gas drainage will cause that the coal seam residual gas pressure is underestimated. In this paper, we construct...
The aim of this paper is to investigate the heating behavior of biomass materials under microwave pyrolysis process. A detailed computational fluid dynamics (CFD) model is developed based on the finite volume method using ANSYS CFX (14.0) software to describe the heat and mass transfer during the microwave processing of biomass pellets. The article presents a modeling approach for incorporating the...
Numerical study of energetic and emission characteristics of HCCI engine operating on iso-octane based fuel blends comprising hydrogen or syngas as additives is conducted on the basis of 2D CFD simulation for two values of fuel-to-air equivalence ratio ϕ = 0.4 and 0.2. The features of combustion are analyzed for the case when the maximal mass-average temperature (Tev)max during the combustion of different...
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