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Showing 1 to 14 of 14 for “"coal gasifier"”.
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Kinetic Modeling of a Transport Coal Gasifier
… time.</p> <p>A North Dakota Freedom lignite coal was used in this study. Freedom lignite is abundant, economical to gasify in North Dakota, and easier to gasify than coals with a higher fixed carbon content. The results show that at least 20 percent of the Freedom lignite is gasified at …
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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
… the 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 Fluid Dynamics (cfd) Modeling of a Laboratory Scale Coal Gasifier
… is an essential part of advancing clean coal technologies. In order to seek insight into the appropriate operations for the formation of synthetic gas (syngas) a numerical simulation was performed to predict the phenomena of coal gasification in a laboratory scale entrained-flow coal …
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Sapphire Based Fiber-Optic Sensing for Extreme High Temperatures
… especially in harsh environment like a coal gasifier or an airplane engine. Single crystal sapphire has been studied in the last two decades as a candidate for harsh environment sensing task, due to its excellent mechanical and optical properties under extreme high temperature (over …
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Conceptual development and analysis of multiple integrated hydrogen production plants with Cu-Cl cycle
… couple Cu-Cl. The first system consists of coal gasifier, membrane shift reactor, hydrogen fueled combined cycle, cryogenic air separation unit, compression system and five-step Cu-Cl cycle. The second system consists of SCWR, hydrogen fueled combined cycle, compression system and five-step …
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Fabry-Perot Sapphire Temperature Sensor for Use in Coal Gasification
… by continuously measuring the temperature in a coal gasifier for 7 months, but its true potential has not yet been realized. The goal of this work and the work of many others is to extend the working life and reliability of high-temperature optical sapphire temperature sensors in harsh …
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Char Reaction Kinetics in a Transport Gasifier
<p>In the field of energy generation, coal gasification is one of the burgeoning technologies that are becoming an attractive alternative to conventional coal conversion. This study will provide valuable data to aid in optimizing and understanding this type of technology, in particular the char …
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Study of the combined cycle power plant as a generation expansion alternative
… cycle and phased-construction of integrated coal gasifier power plants on generation expansion. The study encompassed both large and small electric utilities and long-run, least-cost expansion plan for the generating system and studies of the short-run production cost of electrical generation …
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Optical Frequency Domain Reflectometry Based Quasi-distributed High Temperature Sensor
… environment is desired in many areas, such as coal gasification, aerospace, etc. Single crystal sapphire is an excellent candidate for construction of harsh environment sensors due to its superior mechanical and optical properties even at temperature beyond 1600°C. The temperature inside a coal …
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Fluidised bed gasification of high-ash South African coals : an experimental and modelling study
South Africa has large coal reserves and produces approximately 74% of its primary energy from coal. Coal gasification using moving bed gasifiers is one of the most important coal utilisation technologies, consuming ± 17.5% of locally produced coal. This study was motivated by the need to …
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Optimization of Great Plains Coal Gasification Using Aspen/SP
… North Dakota operates the only commercial coal-to-synthetic natural gas (SNG) plant in the United States, and continued research on the plant's operations is of prime importance. An ASPEN/SP model of a Lurgi coal gasifier that will predict the impact of variable input parameters, such as …
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High Temperature Corrosion of Single Crystal Sapphire and Zirconia in Coal Gasification and Commercial Glass Environments
… in extremely corrosive environments, such as in coal gasifiers, a new sensor technology has been developed. This optical, ultra high temperature measurement system utilizes single crystal sapphire as a sensing element. A series of experiments was performed to determine the corrosion resistance of …