EFCT: Environmental Footprint Comparison Tool. A tool for understanding environmental decisions related to the forest products industry. Chlorinated Compounds. headerlink
Effects of decreased release of chlorinated compounds on energy use

For purposes of broad comparison, bleaching practices may be categorized on the basis of their tendency to generate organochlorine compounds. Though an oversimplification, it is convenient to progressively categorize them as conventional, elemental chlorine free (ECF), enhanced ECF, and totally chlorine free (TCF). Conventional bleaching is associated with the use of elemental chlorine, whereas enhanced ECF precedes bleaching with extended cooking and/or oxygen delignification. Each has a different energy profile that can be significantly influenced by site-specific conditions.

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More information:

Bleaching configurations

Importance of unbleached pulp lignin content

Electricity to make bleaching chemicals

Bleaching sequences