The electrochemical oxidation of sulphur dioxide at porous catalysed carbon electrodes in sulphuric acid

1973 ◽  
Vol 18 (2) ◽  
pp. 185-189 ◽  
Author(s):  
K. Wiesener
Keyword(s):  
Electrochemical Oxidation ◽  
Sulphuric Acid ◽  
Sulphur Dioxide ◽  
Carbon Electrodes

scholarly journals Modelling and Multi-Objective Optimization of the Sulphur Dioxide Oxidation Process

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1072
Author(s):  
Mohammad Reza Zaker ◽  
Clémence Fauteux-Lefebvre ◽  
Jules Thibault
Keyword(s):  
Sulphuric Acid ◽  
Sulphur Dioxide ◽  
Variable Number ◽  
Inlet Temperature ◽  
Multi Objective Optimization ◽  
Absorption Column ◽  
Maximum Reaction Rate ◽  
Multi Objective ◽  
Maximum Reaction

Sulphuric acid (H2SO4) is one of the most produced chemicals in the world. The critical step of the sulphuric acid production is the oxidation of sulphur dioxide (SO2) to sulphur trioxide (SO3) which takes place in a multi catalytic bed reactor. In this study, a representative kinetic rate equation was rigorously selected to develop a mathematical model to perform the multi-objective optimization (MOO) of the reactor. The objectives of the MOO were the SO2 conversion, SO3 productivity, and catalyst weight, whereas the decisions variables were the inlet temperature and the length of each catalytic bed. MOO studies were performed for various design scenarios involving a variable number of catalytic beds and different reactor configurations. The MOO process was mainly comprised of two steps: (1) the determination of Pareto domain via the determination a large number of non-dominated solutions, and (2) the ranking of the Pareto-optimal solutions based on preferences of a decision maker. Results show that a reactor comprised of four catalytic beds with an intermediate absorption column provides higher SO2 conversion, marginally superior to four catalytic beds without an intermediate SO3 absorption column. Both scenarios are close to the ideal optimum, where the reactor temperature would be adjusted to always be at the maximum reaction rate. Results clearly highlight the compromise existing between conversion, productivity and catalyst weight.

Electrochemical oxidation of sildenafil citrate (Viagra) on carbon electrodes

2004 ◽  
Vol 501 (2) ◽  
pp. 227-233 ◽  
Author(s):  
Sibel A. Özkan ◽  
Bengi Uslu ◽  
Petr Zuman
Keyword(s):  
Electrochemical Oxidation ◽  
Sildenafil Citrate ◽  
Carbon Electrodes

Electrochemical oxidation of amine-containing compounds: a route to the surface modification of glassy carbon electrodes

Langmuir ◽  
1994 ◽  
Vol 10 (4) ◽  
pp. 1306-1313 ◽  
Author(s):  
Randall S. Deinhammer ◽  
Mankit Ho ◽  
James W. Anderegg ◽  
Marc D. Porter
Keyword(s):  
Surface Modification ◽  
Electrochemical Oxidation ◽  
Glassy Carbon ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes

Purification Route of Pyrite from Coal Mining

2016 ◽  
Vol 869 ◽  
pp. 155-158
Author(s):  
Camila Machado de Oliveira ◽  
Adilson Oliveira ◽  
Jeane Almeida do Rosário ◽  
Agenor de Noni Jr. ◽  
Michael Peterson
Keyword(s):  
Solar Cells ◽  
Organic Solvent ◽  
Solid Waste ◽  
Coal Mining ◽  
Sulphuric Acid ◽  
Sulphur Dioxide ◽  
Hot Water ◽  
Soluble Salts ◽  
It Use ◽  
Purity Level

Pyrite, mineral largely found in nature, is considered a solid waste when is obtained from the coal mining. However, can be precursor of products like: sulphur, sulphuric acid, hematite, sulphur dioxide, fertilizers and iron sulfates. Several studies also point it property of semiconduction and it use in solar cells. Increase it purity level is important for transforming it in products with more aggregate value. Thus, the present work suggests a purification route for the reduction in soluble salts in water, organics and quartz associated with pyrite from the coal mining beneficiation. The used methods were solubilization in hot water and in organic solvent (dichloromethane). Were applied XRD, FTIR, total sulphur determination, and gas helium picnometry. Comparing the results obtained for the “in nature” pyrite with the purified one, proved the efficiency of the proposed method.

Mortality and cancer morbidity in workers exposed to sulphur dioxide in a sulphuric acid plant

1988 ◽  
Vol 61 (3) ◽  
pp. 157-162 ◽  
Author(s):  
Viveka Englander ◽  
Allan S�berg ◽  
Lars Hagmar ◽  
Robyn Attewell ◽  
Andrejs Sch�tz ◽  
...  
Keyword(s):  
Sulphuric Acid ◽  
Sulphur Dioxide ◽  
Acid Plant ◽  
Cancer Morbidity

Chemical and electrochemical oxidation of phenothiazine

1993 ◽  
Vol 71 (5) ◽  
pp. 674-677 ◽  
Author(s):  
Alexei N. Pankratov ◽  
Inna M. Uchaeva ◽  
Alexander N. Stepanov
Keyword(s):  
Electrochemical Oxidation ◽  
Sulphuric Acid ◽  
Quantum Chemical ◽  
Oxidation Reaction ◽  
Cation Radical ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Diffusion Controlled ◽  
Voltammetric Technique

The oxidation of phenothiazine in dilute solutions of sulphuric acid leads to the corresponding cation radical. Using a potentiometric technique, a pKa value of 5.72 ± 0.05 was determined for phenothiazine. The kinetics has been studied and participation of both protonated and unprotonated oxidant in the oxidation reaction has been confirmed. Using a voltammetric technique with a rotating disk electrode, the anodic oxidation of phenothiazine was shown to be a one-electron diffusion-controlled process. A quantum chemical explanation was found for the direction of phenothiazine protonation and the absence of a dimerization stage of oxidation.

Sign in / Sign up

Export Citation Format

Share Document