Chemical reactions

A major application of heat-transfer fluids is their use as heating or cooling agents in chemical reactions. The following table lists some typical examples.

 

 

 

Supply of process heat and removal of process heat (cooling) Condensation reactions
Cyclisation processes
Polycondensation processes
Oxidative changes
Cleavage reactions
Hydrogenisation
Purification and separation processes Distillation
Fractionation
Fractional crystallisation
Melting-on processes Wire coating
Preheating of reactants Preheating air in oxidation processes
Preheating products in thermal cleavage reactions
Energy recovery From waste gases in cleavage and combustion processes and in waste-gas purification

 

 

Recently, energy conservation has become an area of interest. This has led to an expansion in the fields of application of heat-transfer fluids with higher load capacities. As a result, the heat content from waste gases out of blast heating apparatuses can be fed back into the process via a heat-transfer medium circuit to preheat the fuels and fuel air. Energy-saving designs in power plants, usually in the flue gas dust collection system, function in an analogous fashion via recuperative heat-displacement systems. In solar power stations the organic heat-transfer fluids gained access to a completely new technology at operating temperatures of 300 to 350°C.