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The slag will exhibit the glassy behavior when G is higher than 0.16 kJ/(mol·K). The results enhance the knowledge of viscosity-temperature behavior of high-sodium coal ash slags and will be helpful for coal selection and blending to avoid slag blockage in entrained flow gasification.
Oct 15, 2016· In this study, the transformation characteristics of sodium in Zhundong coal were investigated during oxygen-rich gasification in a circulating fluidized bed (CFB) reactor. The reactor, with a fuel treatment rate of 0.4 t/d, was specially made for experiments on thermochemical conversion of high alkali coal.
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The U.S. Department of Energy (DOE) Office of Fossil Energy supports activities to advance coal-to-hydrogen technologies, specifically through the process of coal gasification with carbon capture, utilization, and storage. DOE anticipates that coal gasification for hydrogen production with carbon capture, utilization, and storage could be deployed in the mid-term time frame.
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The speciation and transformation of sodium during Zhundong coal circulating fluidized bed gasification were investigated. Sodium speciation was investigated by chemical fractionation analysis using inductively coupled plasma atomic emission spectroscopy. X-ray powder diffraction was employed to analyze crystalline compounds in the ashes. H2O-soluble sodium is the predominant occurrence ...
The invention discloses a kind of continuous supercritical water gasification furnace of quasi- eastern coal, upper end cover and lower cover are fixed on the top and bottom of fluidized bed main body；Reaction chamber is equipped in fluidized bed main body；The reaction for being provided centrally with connection reaction chamber of upper end cover produces liquid outlet；The horizontally ...
Dec 01, 2006· Read "Reactions between sodium and kaolin during gasification of a low-rank coal, Fuel Processing Technology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Fly ash is the air entrained inorganic ash residue from the burning of pulverized coal, such as in a fluidized bed power plant boiler. It is also formed in the fluidized gasification of coal-derived carbonaceous solids to produce synthesis gas by the water gas reaction.
Alkali species in coal play an important role in mineral matter reactions during gasification. Brown coal ashes can be high in sodium (up to 20 wt%), which interacts with other minerals to significantly affect the formation of slag (liquid phase).
Early pilot plant trials on the gasification of a South Australian Bowmans coal resulted in the agglomeration of ash rich in silica .From the trials it was found that the silicates and aluminosilicates of sodium were the major components of fused matrix binding agglomerates in examined samples.
The temperature and coal type are both important influencing factors on the volatilization of sodium during Zhundong coal gasification. Sodium in Shenhua coal ashes evidently decreases with the increase of the temperature, whereas it increases in Shaerhu coal and Tianchi coal (TC) ashes. The occurrence of sodium in the fly ash is different ...
Coal-fired plants have been powering the electric grid for more than a hundred years, but the technology being used in them is not stagnant, as many advancements have been made. One new design ...
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Coal or similar carbonaceous solids impregnated with gasification catalyst constituents (16) are oxidized by contact with a gas containing between 2 volume percent and 21 volume percent oxygen at a temperature between 50° C. and 250° C. in an oxidation zone (24) and the resultant oxidized, catalyst impregnated solids are then gasified in a fluidized bed gasification zone (44) at an elevated ...
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Feedstocks enter the gasifier at the top, while steam and oxygen enter from below. Any kind of carbon-containing material can be a feedstock, but coal gasification, of course, requires coal. A typical gasification plant could use 16,000 tons (14,515 metric tons) of lignite, a brownish type of coal, daily.
Download Citation on ResearchGate | Reactions between sodium and kaolin during gasification of a low-rank coal | The experimental results from the reactions between a low-rank coal containing ...
Transformations of sodium during gasification of low-rank coal ... data obtained from Janina Mining Plant and Wieczorek Coal Mine. ... silica from the coal are reacting to form sodium silicate ...
Hydrogen production is the family of industrial methods for generating hydrogen.Hydrogen is primarily produced by steam reforming of natural gas.Other major sources include naphtha or oil reforming of refinery or other industrial off-gases, and partial oxidation of coal and other hydrocarbons.
May 19, 2015· As a professional supplier, sinoder and its partner has manufactured and built tens of different coal gasfication plants in China and Oversea Since 2000. Now we pay much attention to the ...
The coal reserves of the recently explored Zhundong Lower‐Middle Jurassic coalfield in northwest China amount to 164 Gt. 1 Many research have reported that Zhundong coal is a promising fuel for power plants due to its high volatility and low ash and sulfur content, and its rich reserves providing long‐term energy support for China's ...
Catalytic gasification can be used to either promote methane formation (a form of which is steam hydrogasification), or suppress it. One recent project, a collaboration between NETL and Research Triangle Institute (RTI), focuses on the catalytic gasification of coal to produce SNG and electricity.
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