scholarly journals Modeling of Pyrolysis in a Stage Scheme of Low‐Grade Solid Fuel Gasification

Pyrolysis ◽  
10.5772/67865 ◽  
2017 ◽  
Author(s):  
Alexander Kozlov ◽  
Anatoly Levin ◽  
Denis Svishchev ◽  
Vitaly Shamansky ◽  
Alexandre Keiko
Keyword(s):  
Solid Fuel ◽  
Low Grade ◽  
Stage Scheme

scholarly journals Analysis of the vapor-oxygen oxidizer in the synthesis gas production from solid fuel

2018 ◽  
Vol 194 ◽  
pp. 01057
Author(s):  
Elena S. Popova ◽  
Alexander N. Subbotin
Keyword(s):  
Mathematical Model ◽  
Oxygen Concentration ◽  
Solid Fuel ◽  
Synthesis Gas ◽  
Gas Production ◽  
Low Grade ◽  
Universal Method ◽  
Oxygen Blow

A universal method of processing low-grade coals, as well as energy waste, is their gasification. A mathematical model of the conversion of coke, placed in a cylindrical capsule, through which a steam-oxygen blow is carried out, is considered. The determining parameter is the proportion of oxygen in the oxidizer. The values of the oxygen concentration in a steam-oxygen oxidizer are found to produce a synthesis gas with a predetermined percentage of combustible components.

scholarly journals A model of pyrolysis in a staged scheme of low-grade solid fuel gasification

2016 ◽  
Vol 754 ◽  
pp. 022006
Author(s):  
A A Levin ◽  
V A Shamansky ◽  
A N Kozlov
Keyword(s):  
Solid Fuel ◽  
Low Grade

scholarly journals Upgrading of consumer characteristics of granulated solid fuel from mixture of low-grade coal and biomass

2015 ◽  
Vol 653 ◽  
pp. 012030
Author(s):  
J S Kuzmina ◽  
O Yu Milovanov ◽  
V A Sinelshchikov ◽  
G A Sytchev ◽  
V M Zaichenko
Keyword(s):  
Solid Fuel ◽  
Low Grade

scholarly journals THERMODYNAMIC MODELING OF SOLID FUEL COMBUSTIBLE WEIGHT GASIFICATION PROCESSES

2017 ◽  
pp. 27-38
Author(s):  
A.V. Snigur ◽  
Yu.G. Prazhennik ◽  
Yu.V. Marchuk ◽  
B.I. Bondarenko
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Solid Fuel ◽  
Reference Data ◽  
Morphological Structure ◽  
Mass Composition ◽  
Low Grade ◽  
Data Array ◽  
A Value ◽  
Morphological Composition

As a model of unconventional fuels combustible mass composition and properties, averages of municipal solid waste (MSW), components of their morphological structure and their derivatives RDF, SRF Ukrainian origin and different world regions are selected. The reference data array: adiabatic equilibrium products state indicators of oxygen and steam-oxygen gasification of municipal solid waste components morphological composition, averages combustible mass of solid waste MSW, RDF, SRF for a given equilibrium parameters: T = 298.15 K, p = 0.1 MPa, depending on the ratio of «combustible mass : oxidant mass» is calculated. Coefficient a value for different by Qнр solid waste groups and other low grade fuels optimally gasification mode is determined. Bibl. 22, Fig. 3, Tab. 9.

Thermal pretreatment of low-grade solid fuel

2015 ◽  
Vol 49 (5) ◽  
pp. 267-273 ◽  
Author(s):  
R. B. Tabakaev ◽  
A. V. Kazakov ◽  
A. S. Zavorin
Keyword(s):  
Solid Fuel ◽  
Low Grade ◽  
Thermal Pretreatment

Direct Observation of Crystalline Ordering In Naturally Graphitized Carbon Produced by Low Grade Metamorphism

1977 ◽  
Vol 35 ◽  
pp. 162-163
Author(s):  
Thomas R. McKee ◽  
Peter R. Buseck
Keyword(s):  
Crystallite Size ◽  
Sedimentary Rocks ◽  
Carbonaceous Material ◽  
Low Grade ◽  
X Ray ◽  
Graphitized Carbon ◽  
Transmission Electron ◽  
Heat Treated ◽  
Commercial Carbon ◽  
Metamorphic Zone

Sediments commonly contain organic material which appears as refractory carbonaceous material in metamorphosed sedimentary rocks. Grew and others have shown that relative carbon content, crystallite size, X-ray crystallinity and development of well-ordered graphite crystal structure of the carbonaceous material increases with increasing metamorphic grade. The graphitization process is irreversible and appears to be continous from the amorphous to the completely graphitized stage. The most dramatic chemical and crystallographic changes take place within the chlorite metamorphic zone.The detailed X-ray investigation of crystallite size and crystalline ordering is complex and can best be investigated by other means such as high resolution transmission electron microscopy (HRTEM). The natural graphitization series is similar to that for heat-treated commercial carbon blacks, which have been successfully studied by HRTEM (Ban and others).

Scanning Electron Microscope Study of Bacteria on Mineral Surfaces

1976 ◽  
Vol 34 ◽  
pp. 130-131
Author(s):  
V.K. Berry
Keyword(s):  
Oxidation Reaction ◽  
Electron Microscope Study ◽  
Elemental Sulfur ◽  
Thiobacillus Ferrooxidans ◽  
Physical Contact ◽  
Metal Sulfides ◽  
Low Grade ◽  
Mineral Surfaces ◽  
Mineral Surface ◽  
Scanning Electron Microscope Study

There are two strains of bacteria viz. Thiobacillus thiooxidansand Thiobacillus ferrooxidanswidely mentioned to play an important role in the leaching process of low-grade ores. Another strain used in this study is a thermophile and is designated Caldariella .These microorganisms are acidophilic chemosynthetic aerobic autotrophs and are capable of oxidizing many metal sulfides and elemental sulfur to sulfates and Fe2+ to Fe3+. The necessity of physical contact or attachment by bacteria to mineral surfaces during oxidation reaction has not been fairly established so far. Temple and Koehler reported that during oxidation of marcasite T. thiooxidanswere found concentrated on mineral surface. Schaeffer, et al. demonstrated that physical contact or attachment is essential for oxidation of sulfur.

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