Hydrogen Sulfide Oxidation by Ozone on Sorbents-Catalysts
Yu. A. Aleksandrov
, A. V. Belyaev
, A. Yu. Sozin
, and M. F. Churbanov
Lobachevsky State University, Nizhni Novgorod, Russia
Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhni Novgorod, Russia
Received February 15, 2010
Abstract—Effect of the sorbents SK-2001, SK-2002, SK-1138, SK-498, SK-8, SK-174, SK-57, SK-458, SK-
455, SK-19, and SK-72 based on a KhIPEK synthetic ceramics on the oxidation of hydrogen sulfide by ozone
was studied. The sorbents that catalyze the reaction of hydrogen sulfide oxidation by ozone were determined.
OF SYSTEMS AND PROCESSES
ISSN 1070-4272, Russian Journal of Applied Chemistry, 2010, Vol. 83, No. 9, pp. 1548–1552. © Pleiades Publishing, Ltd., 2010.
Original Russian Text © Yu.A. Aleksandrov, A.V. Belyaev, A.Yu. Sozin, M.F. Churbanov, 2010, published in Zhurnal Prikladnoi Khimii, 2010, Vol. 83,
No. 9, pp. 1448–1452.
Hydrogen sulfide is used or formed in a number of
chemical industries and is one of the main products in
such processes as biomass rotting and volcanic
eruptions. Hydrogen sulfide is highly toxic. Therefore,
purification of air to remove hydrogen sulfide is a
topical task in a number of cases. A promising method
for air purification to remove hydrogen sulfide is its
oxidation with ozone.
It is known  that ozone is widely used for
sanitary purification and deodorization of air.
However, this process is insufficiently effective in the
homogeneous mode of air purification to remove
ecologically hazardous chemical compounds with low
or extremely low maximum permissible concentrations
(MPCs) in air and, in particular, hydrogen sulfide.
It is known that, in the gas phase, one molecule of
ozone reacts with one molecule of hydrogen sulfide to
give sulfur dioxide and water . However, the
relevant kinetic data are contradictory. Studies of this
reaction in flow conditions demonstrated that its order
with respect to ozone is 1.5 and that with respect to
hydrogen sulfide is “zero”  or 0.5 . It was found
in  that the rate constant k [M
] of the reaction
between ozone and hydrogen sulfide is described by
log k = 6.9 – 8300/2.3RT, (1)
where k(25°C) = 8.5 ± 2 M
, R is the universal
gas constant (1.987 cal mol
), and T is the
absolute temperature (K).
It should be emphasized that the rate constant is
small at room temperature. Therefore, it seems promis-
ing to oxidize hydrogen sulfide with ozone in the
presence of sorbents that raise the reactant concentra-
tions on their surface and thereby make higher the
The aim of the study was to examine whether the
sorbents can be used to accelerate the reaction of
hydrogen sulfide oxidation by ozone.
Experiments were carried out with sorbents based
on a KhIPEK synthetic ceramics (SC) [5, 6]. The
KhIPEK sorbents are based on natural clays. Ceramic
materials of acid and alkaline nature were used. The
acid nature of a ceramic was provided by introduction
into the raw material. The composition of the
stock for the acid ceramic was varied by changing the
proportion of the introduced amount of natural clays
with addition of an anticorrosive cement and wood
flour. In calcination of the sorbents, the wood flour
burns out and makes the sorbents porous. The alkaline
nature of a ceramic was provided by introducing
powdered aluminum, oxides of alkaline-earth metals
into the stock and using a high-modulus liquid glass as
a stock binder. In this study, some separate
components of the stock were also used to study the
behavior of ozone and oxidation of hydrogen sulfide.
The following sorbents were used: SK-2001, SK-
2002, SK-1138, SK-498, SK-8, SK-174, SK-57, SK-