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Simultaneous removal of SO 2 , SO 3 and H 2 SO 4 mist from the gas after TiO 2 calcining
Author(s) -
Tilly Jadwiga,
Tomaszewski Zbigniew,
Toczkowski Jacek
Publication year - 1991
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280520304
Subject(s) - calcination , ferrous , absorption (acoustics) , sulfate , chemistry , salt (chemistry) , hydrolysis , analytical chemistry (journal) , absorption rate , nuclear chemistry , chromatography , materials science , organic chemistry , catalysis , composite material
Abstract Absorption of SO 2 and SO 3 in the solutions of waste ferrous sulfate (so‐called ‘green salt’) and in the spent acid after TiO 2 hydrolysis, at H 2 SO 4 concentrations ranging from 0–5 to 15 g/m 3 (STP), was studied. The rate of SO 3 absorption has been found to rise linearly with increasing SO 3 concentration in the gas and to be independent on H 2 SO 4 concentration in solution. The SO 2 absorption also rises linearly with increasing SO 2 content in the gas, but diminishes as H 2 SO 4 concentration increases—an upper limit of 100 g H 2 SO 4 /kg H 2 O is indicated. The initial concentration of the solution must not be higher than 40 g H 2 SO 4 /kg H 2 O.