Semicoke

Semicoke

 

a solid fuel residue obtained by the low-temperature carbonization of solid fuels. The properties and composition of semicoke are determined by the type of fuel and the method of low-temperature carbonization used. Semicoke contains up to 10–15 percent volatile matter, as well as undesirable impurities of ash and sulfur. It is an easily ignited, smokeless fuel with a high heat of combustion—not less than 309 megajoules/m3(7,400 kilocalories/m3). Varieties with a low ash content may be produced in the form of large cakes and are used as an efficient fuel, especially for domestic heating. Fine semicoke serves as an energy-producing fuel and is added to coking charges.

References in periodicals archive ?
Our earlier study of the origin of these phenols showed that most of them still originate from the process water added to the waste residue and even from the groundwater that had been contaminated with phenols before it was used for cooling the semicoke [4].
When used for oil extraction, approximately half of the oil shale turns into semicoke during pyrolysis.
On continuous pyrolysis these mesophases are extensively deformed by bubble percolation; eventually viscosity significantly increases to allow further deformation and a fine fibrous microstructure of needle coke is established as the mesophase congeals to semicoke.
All these changes were due to semicoke formation, because in the range of about 350-500 [degrees]C the thermal degradation of coal proceeds, and gas (mainly hydrogen, methane and carbon oxides), reaction water and tar are evolved.
is also lagging behind in developing technologies for using coal in the future including processing coal into synthetic liquids, motor fuels, gas and semicoke.
Assessment of vegetation performance on semicoke dumps of Kohtla-Jrve oil shale industry, Estonia
332 Mt of coke and semicoke was exported as compared with 3.
The study of hydration and carbonation reactions and corresponding changes in the physical properties of co-deposited oil shale ash and semicoke wastes in a small-scale field experiment.
ESI FT-ICR MS and gas chromatography-mass spectrometry (GC-MS) disclosed that the major organic nitrogen components extracted from oil shale semicoke were [C.
The curve-resolved peaks that correspond to amino nitrogen disappear from the spectrum of the semicoke of HD oil shale sample at 500 [degrees]C and from the spectra of semi-cokes of MM and YJ oil shale samples at 600 [degrees]C.