Air/water oxydesulfurization of coal: laboratory investigation

Technical Report · Fri Aug 01 04:00:00 EDT 1980

DOI:https://doi.org/10.2172/5292109· OSTI ID:5292109

Warzinski, R. P.; Friedman, S.; Ruether, J. A.; LaCount, R. B.

Air/water oxidative desulfurization has been demonstrated in autoclave experiments at the Pittsburgh Energy Technology Center for various coals representative of the major US coal basins. This experimentation has shown that the reaction proceeds effectively for pulverized coals at temperatures of 150 to 200/sup 0/C with air at a total system pressure of 500 to 1500 psig. Above 200/sup 0/C, the loss of coal and product heating value increases due to oxidative consumption of carbon and hydrogen. The pyritic sulfur solubilization reactions are typically complete (95 percent removal) within 15 to 40 minutes at temperature; however, significant apparent organic sulfur removal requires residence times of up to 60 minutes at the higher temperatures. The principal products of the reaction are sulfuric acid, which can be neutralized with limestone, and iron oxide. Under certain conditions, especially for high pyritic sulfur coals, the precipitation of sulfur-containing compounds from the products of the pyrite reaction may cause anomalous variations in the sulfur form data. The influence of various parameters on the efficiency of sulfur removal from coal by air/water oxydesulfurization has been studied.

• Research Organization: Department of Energy, Pittsburgh, PA (USA). Pittsburgh Energy Technology Center
• OSTI ID: 5292109
• Report Number(s): DOE/PETC/TR-80/6
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
AUTOCLAVES
BENCH-SCALE EXPERIMENTS
CHALCOGENIDES
COAL PREPARATION
COMMINUTION
DATA
DATA FORMS
EXPERIMENTAL DATA
GRAPHS
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
MINERALS
NUMERICAL DATA
ORES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PITTSBURGH OXYDESULFURIZATION PROCESS
PYRITE
PYRITES
REMOVAL
SULFIDES
SULFUR COMPOUNDS
SULFUR ORES
TABLES
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS