Abstract
The thesis deals with measurements of the sulphur dioxide oxidation reaction rate with V{sub 2}O{sub 5}/K{sub 2}S{sub 2}O{sub 7}-catalysts. The catalysts are in the liquid phase at the conditons of the reaction; bacause of this the catalysts are deposited on a support (Controlled Pore Glass). The dependence of the reaction rate on the partial pressures of O{sub 2}, SO{sub 2} and SO{sub 3} has been examined. The reaction is performed in a four-stage reactor systems with intermediate cooling and absorption of SO{sub 3} after the third and fourth stage. A catalyst enabling a design without expensive absorption is of great interest. A survey of relevant literature is given. The potential use of salt melts is described. Advantages and disadvantages of different reactor designs and analysis methods are explained. Reaction rate expressions are tried. It is shown that different kinetic behaviours in the low-temperature region can be accounted for by crystallization of different vanadium complexes. The measurements show the expected sharp break in the Arrhenius plots with a low apparent activation energy in the high-temperature region and high apparent activation energy in the low-temperature region. No drastic changes in the break point temperature are seen between K/V = 3.5 and 10.0.
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Citation Formats
Nielsen, P E.
Kinetics and mechanism for the SO{sub 2}-oxidation with V{sub 2}O{sub 5}/K{sub 2}S{sub 2}O{sub 7}-catalysts.
Denmark: N. p.,
1990.
Web.
Nielsen, P E.
Kinetics and mechanism for the SO{sub 2}-oxidation with V{sub 2}O{sub 5}/K{sub 2}S{sub 2}O{sub 7}-catalysts.
Denmark.
Nielsen, P E.
1990.
"Kinetics and mechanism for the SO{sub 2}-oxidation with V{sub 2}O{sub 5}/K{sub 2}S{sub 2}O{sub 7}-catalysts."
Denmark.
@misc{etde_10140722,
title = {Kinetics and mechanism for the SO{sub 2}-oxidation with V{sub 2}O{sub 5}/K{sub 2}S{sub 2}O{sub 7}-catalysts}
author = {Nielsen, P E}
abstractNote = {The thesis deals with measurements of the sulphur dioxide oxidation reaction rate with V{sub 2}O{sub 5}/K{sub 2}S{sub 2}O{sub 7}-catalysts. The catalysts are in the liquid phase at the conditons of the reaction; bacause of this the catalysts are deposited on a support (Controlled Pore Glass). The dependence of the reaction rate on the partial pressures of O{sub 2}, SO{sub 2} and SO{sub 3} has been examined. The reaction is performed in a four-stage reactor systems with intermediate cooling and absorption of SO{sub 3} after the third and fourth stage. A catalyst enabling a design without expensive absorption is of great interest. A survey of relevant literature is given. The potential use of salt melts is described. Advantages and disadvantages of different reactor designs and analysis methods are explained. Reaction rate expressions are tried. It is shown that different kinetic behaviours in the low-temperature region can be accounted for by crystallization of different vanadium complexes. The measurements show the expected sharp break in the Arrhenius plots with a low apparent activation energy in the high-temperature region and high apparent activation energy in the low-temperature region. No drastic changes in the break point temperature are seen between K/V = 3.5 and 10.0. The reaction rate is close to first order in dependence of the partial pressure of O{sub 2} for both K/V-ratios 3.5 and 10.0. The dependence on SO{sub 2} seems not to depend on the K/V-ration, whereas the dependence on SO{sub 3} seems to depend on the K/V-ratio. Results of the measurements are given. (AB) 57 refs.}
place = {Denmark}
year = {1990}
month = {Jun}
}
title = {Kinetics and mechanism for the SO{sub 2}-oxidation with V{sub 2}O{sub 5}/K{sub 2}S{sub 2}O{sub 7}-catalysts}
author = {Nielsen, P E}
abstractNote = {The thesis deals with measurements of the sulphur dioxide oxidation reaction rate with V{sub 2}O{sub 5}/K{sub 2}S{sub 2}O{sub 7}-catalysts. The catalysts are in the liquid phase at the conditons of the reaction; bacause of this the catalysts are deposited on a support (Controlled Pore Glass). The dependence of the reaction rate on the partial pressures of O{sub 2}, SO{sub 2} and SO{sub 3} has been examined. The reaction is performed in a four-stage reactor systems with intermediate cooling and absorption of SO{sub 3} after the third and fourth stage. A catalyst enabling a design without expensive absorption is of great interest. A survey of relevant literature is given. The potential use of salt melts is described. Advantages and disadvantages of different reactor designs and analysis methods are explained. Reaction rate expressions are tried. It is shown that different kinetic behaviours in the low-temperature region can be accounted for by crystallization of different vanadium complexes. The measurements show the expected sharp break in the Arrhenius plots with a low apparent activation energy in the high-temperature region and high apparent activation energy in the low-temperature region. No drastic changes in the break point temperature are seen between K/V = 3.5 and 10.0. The reaction rate is close to first order in dependence of the partial pressure of O{sub 2} for both K/V-ratios 3.5 and 10.0. The dependence on SO{sub 2} seems not to depend on the K/V-ration, whereas the dependence on SO{sub 3} seems to depend on the K/V-ratio. Results of the measurements are given. (AB) 57 refs.}
place = {Denmark}
year = {1990}
month = {Jun}
}