India
To bring down energy consumption and to ensure high level of dryness in final ethanol product, Molecular Sieve (MolSieve) has proved to be ideal. Molecular Sieve is a synthetic adsorbent. It was introduced more than a decade ago to dehydrate ethanol. Earlier systems operated in liquid phase and used thermal swing regeneration process, which did not make them very energy efficient. Further development on the adsorbent saw introduction of vapor phase operation with pressure swing regeneration system. This proved to be highly energy-efficient.
The vapor phase pressure swing regeneration system employs Molecular Sieve beds which act as adsorbent. These beds are made of zeolite with an effective pore size opening of about 3 Angstrom.
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