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 ...
The plant uses Lurgi coal gasification, Lurgi Rectisol, and Lurgi Phenosolvan processes. Present production of 219 million cu ft/day is provided by 11 of the 13 installed gasifiers. Over the 17 years of operation the plant has achieved an average longterm availability of 85 percent on the gasifiers and 97 percent on the Rectisol gas ...
5/4/2013 · haiqi dry bottom pressurized coal gasifier The haiqi haiqi gasification process comprihaiqi 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.
through the bed of coal and the ash, either dry or as a slag, is withdrawn through the bottom. There are two technology variants, namely the LurgiSasol dry bottom and the British Gas/Lurgi slagging systems. Figure IV Schematic of the LurgiSasol dry bottom gasifier and a U Gas fluidised bed gasifier (NETL 2013a and 2013c) 9.
In the Shell gasification process, coal is crushed and dried and then fed into the Shell gasifier as a dry feed. The gasifier, as shown in Figure 8, is an oxygenblown, waterwall gasifier eliminating refractory durability issues. It is good for wide variety of feed stocks, from pet coke to lowrank coals and has been run on biomass as well.
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
The results by Niu et al. [36] showed that the main hightemperature minerals in the Lurgi coal gasification ash were anorthite (CaAl 2 Si 2 O 8 ), augite (CaFeSi 2 O 6 ), hematite (Fe 2 O 3 ...
In industrial chemistry, coal gasification is the process of producing syngas—a mixture consisting primarily of carbon monoxide (CO), hydrogen (H 2), carbon dioxide (CO 2), methane (CH 4), and water vapour (H 2 O)—from coal and water, air and/or oxygen.. Historically, coal was gasified to produce coal gas, also known as "town gas".Coal gas is combustible and was used for heating and ...
2005. Sasol utilises low grade coal in a Lurgi gasification process to produce synthesis gas from which ash is an inevitable coproduct. Gasification ash, referred to as coarse ash, is a clinker ash with heterogeneous texture varying from fine material to large irregularly shaped aggregates. Ash utilisation opportunities can be separated into ...
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 ...
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).
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.
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.
The Sasol Slurry Phase DistillateTM Process (Sasol SPD™ process) is at the core of Sasol's GTL technology. The three stage process combines three leading proprietary technologies. In the first Reforming stage, natural gas is combined with oxygen to form a syngas which is then subjected to conversion in the Sasol Low Temperature Fischer TropschTM (Sasol LTFT™) Process for the production ...
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.
The SasolLurgi Fixed Bed Dry Bottom gasifier (SL FBDB) treats a feed coal containing 30% ash forming minerals, which means that there are complex mineralogical processes occurring ...
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 ...
. Advantages and disadvantages of using the Lurgi gasification process to produce hydrogen from Oklahoma coal are listed. Special attention was given to the production of heat for the process; heat is generated by burning part of pretreated coal in the steam generator. Overall performance of the Lurgi process is summarized in tabular ...
The Lurgi process was developed in two directions. In one direction, the pilot plant was built to carry out the gasification at pressures up to 100 bar. ... Shell coal gasification process (SCGP) ... (2005) SasolLurgi Coal gasification technology and low rank coal. In: Gasification Technologies Council Conference, San Francisco, 1012 Oct ...
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.
© DZCrusher - كل الحقوق محفوظة
