Structure of coke, carbon black,charcoal.
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Answers
Answer:
Coke is used as a feedstock in coke ovens for the steel industry, for heating purposes, for electrode manufacture, and for the production of chemicals. Petroleum coke (petcoke) is the gray-to-black solid carbonaceous residue left by the destructive distillation of petroleum residua. Carbon has two natural crystalline allotropic forms: graphite and diamond. Each has its own distinct crystal structure and properties. Carbon black consists of planes of carbon atoms fused together randomly to form spherical particles, which in turn form structures or aggregates. Natural graphite is an excellent conductor of heat and electricity. It is stable over a wide range of temperatures. Graphite is a highly refractory material with a high melting point. The test methods for coke are necessary for defining the coke as a fuel (for internal use in a refinery) or for other uses, particularly those test methods where prior sale of the coke is involved.
Answer:
Coke
Technological properties of a coke directly depend on a coke structure, i.e., on carbon matrix (a solid phase in a porous medium) and on pore system. Coke structure is deeply transformed during blast furnace operation and one of the most important factors responsible for that is the CO2 gasification.
Carbon black
This is a measure of the three-dimensional fusion of carbon black particles to form aggregates, which may contain a large number of particles. ... Increasing carbon black structure increases modulus, hardness, electrical conductivity, and improves dispersibility of carbon black, but increases compound viscosity.
Charcoal
Charcoal is normally obtained from the burning of wood, peat, bones, cellulose, or other carbonaceous substances with little or insufficient air. It is an amorphous carbon in the form of highly porous microcrystalline graphite. When charcoal is used as an additive to clay, it can help save energy in brick production.