Sulphur dioxide oxidation

Bunimovich, G. A., Matros, Yu. Sh., and Boreskov, G. K., Unsteady state performance of sulphur dioxide oxidation in production of sulfuric acid, in Frontiers in Chemical Reaction Engineering, Vol. 2 (Doraiswarmy, L. K., and R. A. Mashelkar, Eds.). Wiley Eastern, New Delhi, 1984. 

Sapundzhiev, H., Grozev, G., and Elenkov, D., Influence of geometric and thermophysical properties of reaction layer on sulphur dioxide oxidation in transient conditions. Chem. Eng. Technol. 13, 131-135 (1990). 

Clegg, N. A., and R. Toumi, Sensitivity of Sulphur Dioxide Oxidation in Sea Salt to Nitric Acid and Ammonia Gas Phase Concentrations, J. Geophys. Res., 102, 23241-23249 (1997). 

For most gas-solid catalytic reactions, usually a rate equation corresponding to one form or another of the Hougen and Watson type described above can be found to fit the experimental data by a suitable choice of the constants that appear in the adsorption and driving force terms. The following examples have been chosen to illustrate this type of rate equation. However, there are some industrially important reactions for which rate equations of other forms have been found to be more appropriate, of particular importance being ammonia synthesis and sulphur dioxide oxidation 42 . 

In presence of concentrated hydrochloric acid sulphur dioxide oxidizes cuprous chloride to cupric chloride, with deposition of sulphur ... 

Fuzzi, S. (1978). Study of iron (III) catalyzed sulphur dioxide oxidation in aqueous solution over a wide range of pH. Atmos. Environ. 12, 1439-1442. 

Council Directive 1999/30/EC, Relating to limit values for sulphur dioxide, oxides of nitrogen, particulate matter and lead in ambient air, Ojf. J. Eur. Comm. L163/41 of 29.6.1999. 

In particular it considers the linkages between the major pollutant emissions of sulphur dioxide/ oxides of nitrogen and ammonia and ... 

In sulphur dioxide oxidation cells the prevention of deactivation of the cathode by sulphur formed by cathodic reduction of sulphite can be a problem. A solution to this is to use a cathode material less sensitive to sulphur (or H2S) formation such as tungsten carbide [49]. An alternative cathode material to be used in this context is Ebonex [50]. 

Compounds of sulphur and other materials are frequently chemisorbed on nickel, copper and platinum catalysts. These are called chemisorbed poisons. For example, in sulphur dioxide oxidation arsenic, present in very small quantity in the reactant stream, poisons the catalyst. 

Bal zhinimaev, B., Ivanov, A., Lapina, O., et al. (1989). Mechanism of Sulphur Dioxide Oxidation over Supported Vanadium Catalysts, Faraday Discuss. Chem. Soc., 87, pp. 133-147. 

Pollution over a city. The main pollutants are carbon monoxide, sulphur dioxide, oxides of nitrogen, hydrocarbons, smoke and dust. 

A wide variety of environmental factors have been shown to produce effects -sometimes lethal - on plant lipid metabolism. These factors range from natural influences (such as light) over which Man has little control to xenobiotics which are used deliberately (e.g. pesticides) or which enter the environment accidently. Some factors such as temperature, sulphur dioxide, oxides of nitrogen and ozone can be classed as natural but their levels (and, therefore, their effects on plants) are exacerbated by human activities. 

Atmospheric constituents reported to change plant lipids or their metabolism include sulphur dioxide, oxides of nitrogen and ozone [3,6]. Atmospheric CO2 is changing, because of the "Greenhouse Effect" but, in addition, the partial pressure of CO2 varies significantly with altitude. Recent experiments (see below) show that CO2 alone has significant effects on lipid metabolism, perhaps because of its action of leaf development and morphology [15]. 

Irritant gases e.g. sulphur dioxide, oxides of nitrogen Corrosive agents e.g. sulphuric acid, sodium hydroxide Toluene diisocyanate... 

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