(BAT) Reference Document for the Production of Chlor-alkali ...

28 kg of hydrogen is produced
{These data do not refer to emissions.}
Chlorine emissions
Chapter 3
Because chlorine is a hazardous gas, leakage from electrolytic cells is avoided. However, small
amounts of chlorine might be emitted through leakage and handling of the cell covers. Several
chlorine detectors are normally placed in the electrolysis hall, giving immediate indication of
any significant leakage. Chlorine concentration in the electrolysis hall can be below odour
detection level if the cells are operated in a slight vacuum. Estimated emissions vary from close
to zero to 16 g chlorine per tonne of chlorine produced. {This section was moved to the section
on common emissions from all chlor-alkali plants (Section 3.4.2.2).}
{It is proposed to change the structure for the following sections. The first section will deal with
emissions relevant for all cell plants. The substructure of this section will however remain
unchanged compared to the current BREF. This general section is followed by sections about
emissions specific to each cell technique which will be in the order of the preceding chapters
starting with the mercury cell technique followed by the diaphragam and membrane cell
technique.}
{Regarding terminology it is proposed to use the term 'emissions' for the direct and indirect
release of substances, vibrations, heat or noise in line with IED and to avoid the term 'output'
for emissions. Waste generation does not fall under emissions. Similarly, 'input' is replaced by
'consumption'.}
WORKING DRAFT IN PROGRESS
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