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Showing 1 to 20 of 82 for “"gasifier"”.
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An Improved Biosolid Gasifier Model
… computer model for a fluidized-bed sewage sludge gasifier (Champion, Cooper, Mackie, & Cairney, 2014) was improved in this work based on limited experimental results obtained from a bubbling fluidized-bed sewage sludge gasifier at the MaxWest facility in Sanford, Florida and published information …
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Char Reaction Kinetics in a Transport Gasifier
… the char reactions of a transport coal gasifier that utilizes the M. W. Kellogg process. It has been very difficult to develop an accurate model for this process due to the lack of kinetic/equilibrium data of the coal char re-bum reaction and its effects on the gasification process.</p> …
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Kinetic Modeling of a Transport Coal Gasifier
<p>The Energy and Environmental Research Center (EERC) in Grand Fork:, Morth Dakota is administering the research on the Transport Reactor Development Unit (TRDU) optimization project. This endeavor is sponsored by the Department of Energy, and it has an ultimate goal to justify the transition to a …
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Bromine Chloride Treatment of Aqueous Gasifier Effluent
<p>The feasibility of treating slagging gasifier wastewater with bromine chloride was studied. The aqueous effluent was collected from the spray washer of the Grand Forks Energy Technology Center's slagging fixed-bed gasifier during run RA-94.</p><p>It was found that slagging gasifier wastewater is …
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Gasification of rubberwood in a downdraft gasifier
… to investigate the perforamnce of a rubberwood gasifier and engine with electricity generation and to identify opportunities for the implementation of such a system in Malaysia. The experimental work included the design, fabrication and commissioning of a throated downdraft gasifier in Malaysia. …
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Alkali attack of coal gasifier refractory linings
… are used to study the alkali reactions in coal gasifier atmospheres. The reactive alkali and sulfur species released from coal are first calculated at temperatures from 800 K to 1900 K and pressures from 1 atm to 100 atm. Four P-T diagrams are constructed for the stable alkali and/or …
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Alkali attack on coal gasifier refractory lining
For a given coal gasification atmosphere, the reactions between fired alumina-chromia solid solution refractories and alkali (sodium and potassium) with and without sulfur at varying alkali concentrations were thermodynamically calculated using the SOLGASMIX-PV computer program and the results were …
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Alkali attack of coal gasifier refractory lining
… operating conditions found in nonslagging coal gasifiers. The reaction products that form when refractory linings in coal gasifiers are exposed to alkali impurities (sodium or potassium) were experimentally determined. Analysis of selected physical and chemical properties of the reaction …
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Computational Scheme Guided Design of a Hybrid Mild Gasifier
… process and guide modification of the mild-gasifier design. The Eulerain-Eulerian method is employed to calculate both the primary phase (air) and secondary phase (coal particles). The improved 3D simulation model, incorporated with a devolatilization model, has been successfully developed …
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Simulation of Coal Gasification Process Inside a Two-Stage Gasifier
… inside a generic two-stage entrained-flow gasifier to produce syngas carbon monoxide and hydrogen. The simulations are conducted using the commercial Computational Fluid Dynamics (CFD) solver FLUENT. The 3-D Navier-Stokes equations and seven species transport equations are solved with …
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Development of a Simulation Model for Fluidized Bed Mild Gasifier
… inside a specially designed fluidized-bed mild gasifier using the commercial CFD solver ANSYS/FLUENT. Eulerain-Eulerian method is employed to calculate both the primary phase (air) and secondary phase (coal particles). The Navier-Stokes equations and seven species transport equations are solved …
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Characteristics of pine needle combustion in a semi-gasifier burner
… of pine needle combustion behavior in a semi-gasifier, in order to ultimately design an effective pine needle cook stove for people in the developing world. Pine needles are a cheap, energy-dense fuel source that can be harnessed for cooking purposes, but they are often physically or …
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Computational Fluid Dynamics (cfd) Modeling of a Laboratory Scale Coal Gasifier
… in a laboratory scale entrained-flow coal gasifier. The mesh for the model was developed with ICEM CFD software and the chemical and physical phenomena were modeled using the fluid flow solver ANSYS FLUENT. Mesh independence was verified. The model was validated with experimental data from …
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Modeling Of USS Gasification To Evaluate New Gasifier Design In Aspen Plus
… Ohio University. A new USS bubbling fuidized bed gasifier was built in Ohio and several tasks were assigned to assess the gasifier's performance and the feasibility of producing tar-free and hydrogen-rich producer gas.</p> <p>This thesis presents a thermo-equilibrium model of USS gasification. The …
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A Preliminary Investigation of Physical-Chemical Treatment of Slagging Gasifier Aqueous Effluent
<p>The feasibility of treating slagging gasifier wastewater by physical-chemical means was studied. Pretreatment and treatment flow schemes were developed by using batch and continuous tests. Results were based mainly on wastewater residual total organic carbon (TOC). A treatment facility was …
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Study of biomass combustion characteristics for the development of a catalytic combustor/gasifier
… complete combustion). A small-scale combustor/gasifier was built and instrumented. Characteristics of combustion were studied for three biomass fuels so that primary and secondary air flow control strategies could be devised. A bang-bang type controller was devised for primary air flow control. …
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Multi-scale chemistry modeling of the thermochemical conversion of biomass in a fluidized bed gasifier
… of solid biomass in a fluidized bed biomass gasifier (FBBG) as well as the influence of transport processes are analyzed and detailed models are developed capable of predicting reactor performance over a wide range of operating conditions on industrially relevant (fast) computational …
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Experimental analysis of stove top designs for pine needle combustion in a semi-gasifier burner
… were designed and tested in a semi-gasifier system under forced convection. Measurements of operating temperature at various locations for each stove top design indicated that the C-shape design was best at distributing heat more evenly throughout the stove top, which is desirable …
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