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Reaction Kinetics of Coke and some Carbonaceous Materials with CO 2 and Coke Strength after Reaction
Author(s) -
Kawakami Masahiro,
Mizutani Yukitaka,
Ohyabu Takayuki,
Murayama Kengo,
Takenaka Tosihide,
Yokoyama Seiji
Publication year - 2004
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200405933
Subject(s) - coke , char , graphite , carbon fibers , materials science , reaction rate , coke strength after reaction , ultimate tensile strength , kinetics , crystallization , order of reaction , chemical engineering , chemistry , metallurgy , composite material , petroleum coke , pyrolysis , reaction rate constant , organic chemistry , catalysis , physics , quantum mechanics , composite number , engineering
The reaction rate per unit mass of wood char was an order of magnitude larger than that of coke and graphite and that of glassy carbon was an order of magnitude smaller than the latter. However, the reaction rate per unit surface area of wood char was smaller than that of graphite. The reaction of coke proceeded homogeneously at temperatures lower than 1373 K, while the reaction was restricted to the surface layer at higher temperatures. The tensile strength of coke after reaction decreased with the reaction degree at 1273 K, but was not changed or even increased at 1573 K. This is due to the fact that at 1573 K the core of the sample was not attacked by CO 2 but strengthened by further crystallization.