Coal gasification process wastewater reusability: separation of organics by membranes
The developing coal-gasification technologies generate gaseous process streams laden with water-soluble species such as H/sub 2/S, NH/sub 3/, HCN, phenols, cresols etc. The primary raw gas clean-up (gas quenching) results in large volumes of highly contaminated wastewaters. The development of a membrane separation process for the removal of selected organics, salts, and scale-forming compounds from stripped coal-conversion process wastewaters, will minimise surface-water pollution and decrease water consumption by permeate recycling. The recent industrial development of non-cellulosic thin-film composite membranes has provided membranes with high salt and low molecular weight organic separation characteristics and insignificant compaction problems. The low pressure membranes (used for brackish water) have definite advantages in terms of energy saving and lower capital cost. The composite membranes perform better than cellulose-acetate membranes. 24 references.
- OSTI ID:
- 6083770
- Journal Information:
- Environ. Prog.; (United States), Vol. 2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL GASIFICATION PLANTS
WASTE WATER
MEMBRANES
CAPITALIZED COST
PERFORMANCE
ORGANIC COMPOUNDS
REMOVAL
SALTS
WATER TREATMENT
COAL GASIFICATION
ENERGY ACCOUNTING
RECYCLING
SEPARATION PROCESSES
WATER RECLAMATION
ACCOUNTING
COST
ENERGY ANALYSIS
GASIFICATION
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
LIQUID WASTES
OXYGEN COMPOUNDS
THERMOCHEMICAL PROCESSES
WASTES
WATER
010800* - Coal
Lignite
& Peat- Waste Management