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Kinetic study of Fe removal from precipitated silica prepared from yellow phosphorus slag
Author(s) -
Su Yi,
Li Guo Bing,
Xia Ju Pei
Publication year - 2009
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20197
Subject(s) - phosphoric acid , nitric acid , phosphorus , inert , chemistry , activation energy , particle size , inorganic chemistry , slag (welding) , nuclear chemistry , materials science , chemical engineering , metallurgy , organic chemistry , engineering
This purification process may be described by the unreacted shrink core model with solid resultant (inert material) and fixed particle size, which is carried out by the action of nitric acid solution on the precipitated silica obtained from yellow phosphorus slag which was leached with phosphoric acid. The study results indicate that the purification process is a chemical reaction controlling step and its apparent activation energy E a is 30.354 kJ/mol, with reaction order 0.6746.