Adsorptive heat recovery drying system
The adsorptive heat recovery (AHR) drying system has been developed by Union Carbide Corp. for energy-efficient drying of petrochemical streams containing substantial amounts of water. Using the ethanol-water azeotrope as an example, it was shown that the AHR drying technology provides an energy-efficient adsorption process alternative to azeotropic and extractive distillation for the dehydration of organic-water azeotropes. The key features of the AHR drying cycle are: 1) the AHR cycle is an energy-efficient adsorption method for drying high water content streams that uses only a fraction of the energy required by conventional thermal swing adsorption/regeneration schemes. 2) all of the heat of adsorption is stored substantially during the adsorption step. 3) stored adsorptive heat is used to supply regeneration energy during the desorption step. This reduces the volume and temperature of purge gas required. 4) unique properties of Union Carbide molecular sieves are utilized. 5) use of fixed bed adsorption is extended from <3% water content to up to 20% or more water content streams. The AHR drying system has been in commercial use for upgrading 190 proof ethanol to 199/sup +/ proof ethanol for over a year. AHR technology is of wide utility in the general area of drying of organic-water azeotropes and of other petrochemical streams containing substantial amounts of water.
- Research Organization:
- Union Carbide Corp., Tarrytown, NY 10591
- OSTI ID:
- 5944330
- Journal Information:
- Chem. Eng. Prog.; (United States), Vol. 82:2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Solid desiccant regeneration by direct solar energy for fresh fruit drying
Pilot Testing of a Highly Efficient Pre-combustion Sorbent-based Carbon Capture System
Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ADSORPTION HEAT
HEAT RECOVERY
DRYERS
WASTE HEAT UTILIZATION
ETHANOL
WATER REMOVAL
PETROCHEMICAL PLANTS
AZEOTROPE
DESORPTION
DRYING
ENERGY EFFICIENCY
MOISTURE
MOLECULAR SIEVES
REGENERATION
ADSORBENTS
ALCOHOLS
CHEMICAL PLANTS
EFFICIENCY
ENERGY RECOVERY
ENTHALPY
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
RECOVERY
REMOVAL
THERMODYNAMIC PROPERTIES
WASTE PRODUCT UTILIZATION
020500* - Petroleum- Products & By-Products
320304 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization