Instrumental methods of analysis of sulfur compounds in synfuel process streams. Quarterly technical progress report, July-September 1984
Task 1. Methods development for the speciation of the polysulfides. Work on this task has been completed in December 1983 and reported accordingly in DOE/PC/40783-T13. Task 2. Methods development for the speciation of dithionite and polythionates. Work on Task 2 has been completed in June 1984 and has been reported accordingly in DOE/PC/40783-T15. Task 3. Total accounting of the sulfur balance in representative samples of synfuel process streams. A systematic and critical comparison of results, obtained in the analysis of sulfur moieties in representative samples of coal conversion process streams, revealed the following general trends. (a) In specimens of high pH (9-10) and low redox potential (-0.3 to -0.4 volt versus NHE) sulfidic and polysulfidic sulfur moieties predominate. (b) In process streams of lower pH and more positive redox potential, higher oxidation states of sulfur (notably sulfate) account for most of the total sulfur present. (c) Oxidative wastewater treatment procedures by the PETC stripping process convert lower oxidation states of sulfur into thiosulfate and sulfate. In this context, remarkable similarities were observed between liquefaction and gasification process streams. However, the thiocyanate present in samples from the Grand Forks gasifier were impervious to the PETC stripping process. (d) Total sulfur contaminant levels in coal conversion process stream wastewater samples are primarily determined by the abundance of sulfur in the coal used as starting material than by the nature of the conversion process (liquefaction or gasification). 13 references.
- Research Organization:
- Pennsylvania State Univ., University Park (USA). Dept. of Chemistry
- DOE Contract Number:
- FG22-81PC40783
- OSTI ID:
- 6437954
- Report Number(s):
- DOE/PC/40783-T16; ON: DE85003230
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
Similar Records
Instrumental methods of analysis of sulfur compounds in synfuel process streams. Quarterly technical progress report for April-June 1984. [Sulfidic, polysulfidic, thiosulfate, sulfite, sulfate, thiocyanate]
Instrumental methods of analysis of sulfur compounds in synfuel process streams. Quarterly technical progress report, October-December 1983
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COAL GASIFICATION
WASTE WATER
COAL LIQUEFACTION
PROCESS SOLUTIONS
CHEMICAL ANALYSIS
SULFUR
TITRATION
VOLTAMETRY
SULFUR COMPOUNDS
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
REDOX POTENTIAL
WATER TREATMENT
CORRELATIONS
EXPERIMENTAL DATA
H-COAL PROCESS
OXIDATION
CHEMICAL REACTIONS
DATA
DISPERSIONS
ELEMENTS
GASIFICATION
HYDROGEN COMPOUNDS
INFORMATION
LIQUEFACTION
LIQUID WASTES
MIXTURES
NONMETALS
NUMERICAL DATA
OXYGEN COMPOUNDS
SOLUTIONS
THERMOCHEMICAL PROCESSES
WASTES
WATER
010800* - Coal
Lignite
& Peat- Waste Management
010600 - Coal
Lignite
& Peat- Properties & Composition
010404 - Coal
Lignite
& Peat- Gasification
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
400102 - Chemical & Spectral Procedures