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Coal--CO[subscript 2] slurry feed has been suggested as an attractive alternative to coal–water slurry feed for single-stage, entrained-flow gasifiers. Previous work demonstrated the system-level advantages of gasification-based plants equipped with CO[subscript 2] capture and CO[subscript 2] slurry feed, under the assumption that …
@article{osti_1014665, title = {On the modeling of a single-stage, entrained-flow gasifier using Aspen Custom Modeler (ACM)}, author = {Kasule, J and Turton, R and Bhattacharyya, D and Zitney, S}, abstractNote = {Coal-fired gasifiers are the centerpiece of integrated gasification combined cycle (IGCC) power plants. The gasifier produces …
The Shell coal gasification system is a single-stage, up-flow, oxygen-blown gasifier which utilizes dry pulverized coal with an entrained flow mechanism. Moreover, it has a membrane wall structure ...
US Department of Energy/National Energy Technology Laboratory (NETL) developed a 3D CFD model of two commercial-sized coal gasifiers [4]. The commercial FLUENT CFD software is used to model the first gasifier, which is a two-stage entrained-flow coal slurry-fed gasifier. The Eulerian–Lagrangian approach is applied.
The U.S. Department of Energy's Office of Scientific and Technical Information
Thermodynamic model of a coal gasifier. After coal is fed into a gasifier, volatiles are released from the coal first, and then the remaining carbon reacts with oxygen following this equation: C (s) + O 2 (v) → CO 2 (v). This reaction is known to be very fast [7], so that the chemical equilibrium of this reaction is quickly achieved. However ...
Single Stage Coal Gasifier. Ask Price. Naltern Technologies Pvt. Ltd. Contact Supplier. Coal Gasifier Plant ₹ 35,00,000/ Piece Get Latest Price . Biomass gasification is a mature technology pathway that uses a controlled process involving heat, steam, and oxygen to convert biomass to hydrogen and other products, without combustion.
This research studies an entrained flow coal gasifier (Fig. 1) which is the same as the one used in the previous study by Chen et al. [2], Bockelie et al. [3] and Wang and Silaen [5].The gasifier is divided into three regions: a combustion region (combustor) in the first or the lower stage, a reduction region (reductor) in the second or the upper …
A single-stage down-drop gasifier with multiple coal injectors and a single oxygen injector at the top of the gasifier was investigated at different temperatures and O2/coal ratios. A finite rate ...
A comprehensive three-dimensional (3D) numerical model is developed for simulation of entrained coal slurry gasifiers. In this model, a presumed probability density function (PDF) method is used to consider turbulent effects on gas-phase reactions in the gasifier. A realizable k−ε model is adopted to predict turbulence information. Coal slurry particles …
Most coal gasifiers employ a single stage which is simple in design and less expensive with respect to manufacturing pressure vessel. When the feed coal is relatively uniform …
The quoted two-stage dual fluidized bed gasification (T-DFBG) devises the use of a two-stage fluidized bed (TFB) to replace the single-stage bubbling fluidized bed gasifier involved in the ...
reduced GOX/coal ratio (~20% less than slurry-fed single stage gasifier). • Long-life components (cooled refractory liner and injector): Long life (Mean Time Between Failure, …
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single-stage process in the flow gasifier to two-stage process can increase the efficiency of the IGCC by almost 1%. The EAGLE-type two-stage gasifier, develo ped in the frameworks of the Japanese
In a single swirling burner gasifier, approximately 55.4% of the coal particles fed from the swirling burner are trapped by the molten slag surface, and 22.5% of carbon in the trapped particles ...
single-stage entrained ow gasi er with coal-CO 2 slurry feed Cristina Botero∗, Randall P. Field, Howard J. Herzog, Ahmed F. Ghoniem Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 Abstract Coal-CO 2 slurry feed has been suggested as an attractive alternative to coal-water slurry feed for single-stage ...
Coal gasification is a versatile process to convert a solid fuel in syngas, which can be further converted and separated in hydrogen, which is a valuable and environmentally acceptable energy carrier. Different technologies (fixed beds, fluidized beds, entrained flow reactors) are used, operating under different conditions of temperature, pressure, and …
The CRIEPI gasifier is an air-blown, dry-fed gasifier and is operated at 20 atm. The inlet, boundary, and operating conditions for the baseline case are shown in Fig. 2. At the first stage, coal is injected tangentially with a mass flow rate of 0.00695 kg/s at each injection location.
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A single-stage down-drop gasifier with multiple coal injectors and a single oxygen injector at the top of the gasifier was investigated at different …
The two-stage entrained flow gasifier developed by MHI is adopted in the present study. Fig. 1 (a) shows the schematic of the conventional-combustion-gasifier (CCG), of which the geometry has been employed in several studies [5], [11].Since gasification reactions are endothermic, the lower combustor generates a large amount of …
In the current paper, a one-dimensional partial differential equation (PDE)-based dynamic model and its simulation results are presented for a single-stage down-fired entrained-flow gasifier. The gasifier model comprises mass, momentum, and energy balances for the gas and solid phases. The initial gasification processes of water …
Yun et al. [10] have studied the performance of a 3-ton/day entrained flow slagging gasifier with coal of different ash content and found that increased ash content of coal from 4 to 17 % has resulted in a reduction in carbon conversion from 100 to 82%, even when the oxygen to coal ratio has increased from 0.69 to 0.8. On the other hand, the ...
A single-stage down-drop gasifier with multiple coal injectors and a single oxygen injector at the top of the gasifier was investigated at different temperatures and O2/coal ratios. A finite rate/eddy dissipation (FR/ED) model was employed to define the chemical reactions. Kinetic data for the various reactions were taken from previous work.
Journal Article: Mathematical Modeling of a Single-Stage, Downward-Firing, Entrained-Flow Gasifier
Single stage gas generatorSingle stage gas generator is a kind of equipment which provides mixed gas for thermal processing workshops of machinery, metallurgy, building materials, light industry, chemical industry and material resistant industries. It is characterized by large gas production, complete gasification, strong adaptability of coal …
Gasification enables coal-, biomass-, MSW-, and waste plastics-to-liquids by producing syngas followed by Fischer-Tropsch synthesis to generate liquid hydrocarbon-based …
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Integrated gasification combined cycle (IGCC) technology typically has lower emissions and greater fuel flexibility than conventional coal-based power generation …
In this work a one dimensional steady state model is developed for a single stage and two-stage bottom fed entrained flow coal gasifier for. The single stage model was first analysed for two ...