The storage of carbon dioxide and acid gases in deep geological formations is considered a promising option for mitigation greenhouse gas emissions. An understanding the primary mechanisms such as convective mixing geochemistry that affect long-term geostorage process saline aquifers prime importance. First, linear stability analysis an unstable diffusive boundary layer porous media presented, where instability occurs due to density difference between saturated brine resident brine. impact...

Sawdust was pyrolyzed in a fixed-bed tubular reactor. The roles of the pyrolysis temperature, sweep gas flow rate, condensation and heating rate yields products were investigated. obtained char, gas, bio-oil ranged between 20 27, 36 45, 33 45 wt %, respectively, at different conditions. According to results under conditions this study, effects on are more significant than effect temperature. chemical characteristics char optimal operational identified by elemental calorific analyses....

Underground coal gasification (UCG) as an efficient method for the conversion of world's resources into energy, liquid fuels, and chemicals has attracted lots attention in recent years. This paper is concerned with a feasibility study UCG process Alberta reservoirs using three-dimensional simulation this based on unique porous media approach. The proposed approach combines effects heat, mass transport, chemical reactions to achieve goal. Computer Modeling Group (CMG) software STARS used...

This study investigated the effects of pyrolysis temperature, feedstock particle size, and vapor residence time on distribution quality liquid char products from sawdust in a fluidized-bed reactor. Sawdust samples were characterized with elemental thermogravimetric analyses. Liquid bio-oil sample characterization was performed by Karl Fischer titration, analysis, gas chromatography–mass spectrometry (GC–MS). The yield appeared to be maximized (≈62 wt %) at 500 °C, highest concentration...

Abstract A three‐dimensional simulation of the Underground coal gasification (UCG) process is studied in terms heat and mass transport phenomena chemical kinetics a seam during combustion by applying controlled retracting injection point technique. The STARS module Computer Modelling Group software used this study. gas species flow rate, cavity shapes, temperature profile are investigated. main motivation behind study to provide methodology using comprehensive porous media approach...

Summary This paper presents the measurements of bitumen thermophysical properties (density and viscosity) over a wide range temperatures (ambient to 200°C) pressures (atmospheric 14 MPa). The have been conducted on three Athabasca samples taken from different locations. A new method was proposed correlate density data as function temperature pressure, with maximum absolute deviation 1.7 kg/m3. viscosity were also correlated two correlations available in literature considering effect pressure...

Solvent‐aided thermal recovery processes have recently gained practical and research interests among other methods due to their reduced environmental footprint superior energy efficiency. One of the main challenges in design solvent‐based is selection an appropriate solvent that maximizes bitumen recoveries. This study attempts introduce dimethyl ether (DME) as a non‐conventional for heavy oil recovery. To investigate performance proposed solvent, thermophysical properties DME/bitumen are...

Summary Steam injection is a widely used oil-recovery method that has been commercially successful in many types of heavy-oil reservoirs, including the oil sands Alberta, Canada. very effective delivering heat key to mobilization. In distant past California, and also recently solvents were/are being as additives steam for additional viscosity reduction. The current applications are field projects involving steam-assisted gravity drainage (SAGD) cyclic stimulation (CSS). present using alone...

Abstract Carbon dioxide storage in deep saline aquifers is considered a possible option to bring greenhouse gas emissions under control. The understanding of the underlying mechanisms, such as convective mixing and associated affecting this may have an impact on long‐term sequestration process aquifers. One significant aspects flow miscible species porous media velocity dependent dispersion. effect dispersion dissolution carbon (CO 2 ) into brine investigated by full nonlinear numerical...

The main recovery mechanism in the solvent-based bitumen processes is gravity drainage. density of heated or diluted at operational conditions required to predict production rate and cumulative oil recovery. In this manuscript, densities bitumen, pentane, their mixtures different pentane weight fractions (0.05, 0.1, 0.2, 0.3, 0.4, 0.5) have accurately been measured. measurements were conducted under applicable for both situ methods pipeline transportation heavy oil. experiments taken using...