Gas separation: processes – Solid sorption – Moving sorbent
Patent
1996-04-18
1997-09-16
Spitzer, Robert
Gas separation: processes
Solid sorption
Moving sorbent
95115, 95125, 95143, 95144, 96125, 96130, 96144, 96154, B01D 5306
Patent
active
056675607
ABSTRACT:
A process and apparatus for the dehumidification and VOC odor remediation of an air stream withdrawn from the passenger compartment of a transportation vehicle is disclosed which employs a continuously rotating wheel support and adsorbent selective for the adsorption of water and VOCs. The wheel is coated with a zeolite adsorbent selected from the low cerium rare earth exchanged zeolite Y-84, a rare earth exchanged zeolite LZ-210, a low cerium rare earth exchanged zeolite Y-64, and mixtures thereof. It was discovered that faujasites which have a zeolite structure including .beta.-cages within which are located tri-valent cations exhibit a Type 1M adsorption isotherm for water which provides a good driving force for adsorption at low partial pressures and a heat of adsorption which is slightly greater than the heat of vaporization/condensation of water. A surprisingly significant increase in the thermal efficiency is possible as a result of the lower regeneration temperature of the adsorbent and the use of novel process steps.
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McBride Thomas K.
Silverman Richard P.
Spitzer Robert
Tolomei John G.
UOP
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