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Gas phase reaction kinetics in boron fibre production
Author(s) -
Fırat Fatih,
Sezgi Naime A.,
Özbelge Hilmi Ö.,
Doğu Timur
Publication year - 2012
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.12671
Subject(s) - boron trichloride , boron , chemistry , hydrogen , continuous stirred tank reactor , chemical kinetics , kinetics , reaction rate , order of reaction , chemical reaction , deposition (geology) , chemical reactor , reaction rate constant , chemical engineering , phase (matter) , inorganic chemistry , catalysis , organic chemistry , physics , quantum mechanics , sediment , engineering , biology , paleontology
In the production of boron fibres using the chemical vapor deposition (CVD) technique, boron deposition and dichloroborane formation reactions occurs simultaneously. Boron deposition reaction occurs at the surface, whereas the formation of dichloroborane is the result of both gas phase and surface reactions. A continuous stirred tank reactor (CSTR) type of reactor was designed to investigate the reaction kinetics and kinetic parameters in the gas phase reactions of boron trichloride and hydrogen. It was concluded that reaction rate of the product increased with an increase in the inlet concentration of both reactants (BCl 3 and H 2 ) and with an increase in the reactor temperature. While reaction order with respect to BCl 3 was almost constant at about 0.5 at each temperature, reaction order with respect to hydrogen increased significantly at temperatures lower than 350°C. A general rate expression was derived for BHCl 2 formation from BCl 3 and hydrogen. © 2011 American Institute of Chemical Engineers AIChE J, 2012