Identification and separation of the organic compounds in coal-gasification condensate waters

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5544108

Mohr, Jr, D H

A substantial fraction of the organic solutes in condensate waters from low-temperature coal-gasification processes are not identified by commonly employed analytical techniques, have low distribution coefficients (K/sub D/) into diisopropyl ether (DIPE) or methyl isobutyl ketone (MIBK), and are resistant to biological oxidation. These compounds represent an important wastewater treatment problem. Analytical techniques were developed to detect these polar compounds, the the liquid-liquid phase equilibria were measured with several solvents. A high-performance liquid chromatography (HPLC) technique was employed to analyze four condensate-water samples from a slagging fixed-bed gasifier. A novel sample-preparation technique, consisting of an azeotropic distillation with isopropanol, allowed identification of compounds in the HPLC eluant by combined gas chromatography and mass spectrometry. Solvents containing trioctyl phosphine oxide (TOPO) have high K/sub D/ values for phenol and dihydroxy benzenes. A fraction of the compounds which are not removed by MIBK may be Lewis acids, because some of them were extracted by the strong Lewis bases, TBP and TOPO.

• Research Organization: California Univ., Berkeley (USA)
• OSTI ID: 5544108
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010800 -- Coal
Lignite
& Peat-- Waste Management
CHROMATOGRAPHY
COAL GASIFICATION
GASIFICATION
HYDROGEN COMPOUNDS
LIQUID COLUMN CHROMATOGRAPHY
LIQUID WASTES
MANAGEMENT
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER