Heating model

Model definition   Launch model

Heating operations are frequently used in process industry on various installations (such as reactors, vessel, etc.). The following photo presents a high temperature reactor.

VOC emissions during heating phase can be determined with this heating model, which gives good results when the temperature increase is significant and approaches the boiling point.


A 7.5 m3 reactor contains 5 m3 of a solvent mixture with the following composition (in mass fraction):

  • Toluene : 60%,
  • Méthyl isobutyl ketone : 30%,
  • Methylene chloride : 10%.

The solvent mixture is heated from 20 to 70°C and the reactor is vented to atmosphere during the heat up operation.

Total emissions calculated during this heating operation are: 2.137 kg of VOC.

For each product emission is:

  • Toluene : 0.615 kg,
  • Méthyl isobutyl ketone : 0.227 kg,
  • Methylene chloride : 1.294 kg.
References :
  • Hatfield, Allen. Improved Algorithum for Estimating Process Emissions From Batch Heating, Environmental Progress, Vol. 17, No. 3, pp. 190-194. (Fall 1998)
  • EIIP. 2005. Methods for Estimating Air Emissions from Paint, Ink and Other Coating Manufacturing Facilities Chapter 8 in EIIP Volume II.

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