Contexts in source publication. ... feed to the SasolLurgi fixedbed drybottom (FBDB) gasifiers used by Sasol in South Africa for coal gasification ( Fig. 1) consists mainly of coarse (>6 mm ...
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PROCESS AND TECHNOLOGY STATUS Coal gasification ... Lurgi and SasolLurgi (dry bottom), British Gas Lurgi (BGL) (slagging) ... Entrained reactor: KoppersTotzek, Shell Coal Gasification Process (SCGP), Prenflo, Siemens, GE Energy,EGas, Mitsubishi Heavy Industries (MHI), Eagle molten slag bath. The much lower steam and somewhat
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The SasolLurgi fixed bed dry bottom gasification process for producing synthesis gas (CO and H{sub 2}) is then described. Coal characteristics and their effects on the performance of the SasolLurgi fixed bed gasification are examined. 10 refs., 5 figs., 1 tab.} place = {United States} year = {2004} month = {Jul} }
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Section snippets Background and introduction. Optimization of the SasolLurgi fixedbed dry bottom (FBDB) gasification process is strategically necessary if anticipated demands for increased gas loads are to be met in the medium and long term, both at the Sasol Synfuels facility in Secunda, (Republic of South Africa) and globally, with the drive to globalize Sasol's coal to liquids ...
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The Lurgi gasifier in China is one of the most suitable technologies to produce synthetic natural gas (SNG) from coal; however, a large amount of byproduct ash is discharged during the Lurgi gasification process, causing many environmental problems. Based on ash samples collected from a commercial Lurgi gasifier in a Chinese coaltoSNG plant, this paper studied the mineral composition and ...
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British Gas/Lurgi Gasifier. reduce steam consumption and consequent gas condensate production. Notably, the BGL gasifier reaches much higher temperatures (over 3600°F or ~2000°C) at the bottom zone of the gasifier, which melts ash to slag. In operation, a coal mixture (coarse coal, fines, briquettes, and flux) is introduced at the top of the ...
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Keywords: SasolLurgi FBDB gasification, syngas (CO+H 2) to chemicals, coal characteristics, experience. 1. INTRODUCTION Sasol has been operating the SasolLurgi fixed bed coal gasification process for more than fifty years, and with ninety seven units in operation still remains the world's largest commercial application of this technology.
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Feed coal and coarse ash particles (heated rock fragments and clinkers), produced from SasolLurgi gasifier tests under different operating conditions, have been characterized by quantitative Xray diffraction, electron microprobe analysis, and associated chemical techniques, as a basis for better understanding of the relations between the mineralogical and physical properties of the ash ...
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The SasolLurgi Technology Company (SLTC), a joint venture between Sasol Technology (PTY) LTD. and Lurgi South Africa, is the sole licensor of the SasolLurgi fixed bed dry bottom gasification process, as well as a host of related process technologies including (amongst other) coal distribution and coproduct processing schemes.
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Overview. Sasol Mining operates six coal mines that supply approximately 40 million tons per annum of thermal coal feedstock to Sasol's operations in Secunda and Sasolburg, South Africa and to the export market. Our main operations comprise the Mooikraal colliery near Sasolburg in the Free State, and the Bosjesspruit, Impumelelo, Shondoni ...
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Secunda CTL is a synthetic fuel plant owned by Sasol at Secunda, Mpumalanga in South uses coal liquefaction to produce petroleumlike synthetic crude oil from process used by Sasol is based on the FischerTropsch is the largest coal liquefaction plant and the largest single emitter of greenhouse gas in the world.. Secunda CTL consists of two production units.
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Sasol I, built and started in 1955, operated 17 SasolLurgi FBDB TM gasifiers to convert the syngas produced from subbituminous coal into a wide variety of liquid chemicals. In 2004, ... Modelling ofthe entrained coal gasification process. Modelling of the CTL process is usually achieved through commercial software packages such as Aspen ...
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Coal is first gasified in the Sasol® FBDB™ Gasification Process to produce synthesis gas ... 26 million tons to gasification 6 Coal Sources: 5 Sasol Mines + 1 mine as contracted coal supplier (High ash yield 2535+ % AD) 84 Mk IV™ Sasol® Fixed Bed Dry Bottom™ Gasifiers producing > 3 million m n
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Gasification is a coal conversion process that could be considered to be more amenable with regards to environmental impact factors when compared to combustion, as it provides minimum direct emission to the atmosphere due to the opportunity to apply a series of gas cleaning processes. Emissions could be in the form of the well known trace elements labelled as toxic present in feed coal.
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The operating conditions of coal gasifier have significant effects on the overall system performance of an associated process. This study designs a methanolelectricity polygeneration system and ...
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Figure : SasolLurgi Fixed Bed Dry Bottom (FBDB) gasifier. In the gasification process, fluxing elementsbearing minerals or nonmineral inorganic elements interact with aluminium silicate present in the coal to lower the melting points of the aluminium silicate and subsequently form the melt (Matjie et al., 2006).
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Gasification process technology. Higman C., in Advances in Clean Hydrocarbon Fuel Processing, 2011. Moving bed gasifiers. Moving bed gasifiers (also called fixed bed gasifiers) are characterized by a bed, in which the solid feed (coal or coke) moves slowly downward under gravity as it is gasified by a blast or oxidant, which generally, but not universally, moves in countercurrent to the feed.
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Coal is a crucial feedstock for South Africa's unique synfuels and petrochemicals industry, and is used by Sasol as a feedstock to produce synthesis gas (CO and H) via the SasolLurgi fixed bed dry bottom gasification process. South Africa, as well as many other countries in the world, will for many years to come rely on its abundant coal ...
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Sasol has been operating the SasolLurgi fixed bed coal gasification process for more than fifty years, and with ninety seven units in operation still remains the world's largest commercial application of this technology. The combined operational and engineering expertise vested in Sasol represents a formidable capability in the field of coal and gasification science.
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Development of an alternative laboratory method to determine thermal fragmentation of coal sources during pyrolysis in the gasification process. J. C. Dyk. Environmental Science. 2001. 25. Semantic Scholar extracted view of "Syngas production from South African coal sources using SasolLurgi gasifiers" by J. C. Dyk et al.
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The ash sample for this study was collected from a commercialscale fixedbed gasification unit in the eastern part of India. This coal gasification plant (CGP) has a syn gas production capacity of 2,25,000 Nm 3/h with a coal requirement of around 270 tons/hr. The plant was built based on Lurgi, Germany SLTC, S. Africa technology.
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Annual Review of Energy Coal Gasification Systems for Power Generation Seymour B. Alpert and Michael J. Gluckman Annual Review of Energy FluidizedBed Combustion Technology E. Stratos Tavoulareas Annual Review of Energy and the Environment PRODUCTION OF HIGHBTU GAS FROM COAL H. R. Linden, W. W. Bodle, B. S. Lee, and K. C. Vyas Annual Review of ...
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Lurgi dry bottom pressurized coal gasifier The Sasol Lurgi gasification process comprises the reaction of steam and O2 with lump sized, low or medium caking coals on a rotating grate at pressures of 20 kg/sq cm to 30 kg/sq cm. The gasifier for the dry bottom pressurized coal gasification process is shown in Fig 9.
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The more complex the gasification process, the more complex is the wastewaterprocessing scheme. On this basis, the movingbed technologies (Lurgi and British Gas/Lurgi) typically require the most complex wastewaterprocessing scheme, while the entrainedflow gasifiers require a relatively simple processing scheme. In either case, wastewater ...
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The FischerTropsch process is a catalytic chemical reaction in which carbon monoxide (CO) and hydrogen (H 2) in the syngas are converted into hydrocarbons of various molecular weights according to the following equation: (2n+1) H 2 + n CO → C n H (2n+2) + n H 2 O. Where n is an integer. Thus, for n=1, the reaction represents the formation of ...
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An estimated 150 Lurgi gasifiers are in operation today, mainly in South Africa, China and the United States (North Dakota). Diagram of the Lurgi DryAsh Gasifier (source: Sasol) Operation The Lurgi gasifier is a pressurized, dryash, moving bed gasifier that produces syngas from lump coal, steam, and oxygen as an oxidant. A high ratio of steam ...
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Coal ash is an inevitable coproduct of the Lurgi coal gasification process employed by Sasol to produce synthesis gas from lowgrade, high ash coal. Approximately 28 million tons of coal is consumed annually by the gasification process at Sasol Synfuels in Secunda producing 7 million tons gasification ash. Approximately 6 million tons of coal
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Feed coal and coarse ash particles (heated rock fragments and clinkers), produced from SasolLurgi gasifier tests under different operating conditions, have been characterized by quantitative Xray diffraction, electron microprobe analysis, and associated chemical techniques, as a basis for better understanding of the relations between the mineralogical and physical properties of the ash ...
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Abstract. Sasol has been operating the SasolLurgi fixed bed coal gasification process for more than fifty years, and with ninety seven units in operation still remains the world's largest ...
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The process followed by Sasol in the production of liquid fuels from coal is briefly described. Synthesis gas is produced via Lurgi coal gasification and hydrocarbons are synthesized via FischerTropsch process. The technology of the FischerTropsch synthesis as utilized at the Sasol I and II plants is described.
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During the Sasol Lurgi gasification process, the coal is gasified in countercurrent mode to the gasification agent, that is steam and oxygen at an inlet temperature of approximately 350 ° C.
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The two gasification processes are the SASOL Lurgi gasification process and the UCG process. ... the composition of tars collected during a sixday underground coal gasification (UCG) test at the ...
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Gasification of coal in a bath of molten sodium carbonate through which steam is passed is the basis of the Kellogg Coal Gasification process. The bath of moiten salt strongly catalyzes the basic ...
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