ASTM D4239
Scope
ASTM D4239 is a standard test method for determining the sulfur content in coal and coke samples using high-temperature tube furnace combustion. It’s an important standard in the coal and coke industry for various reasons:
Purpose and significance:
- Sulfur is a critical element in coal and coke analysis, impacting combustion efficiency, environmental emissions, and product quality.
- Accurate sulfur determination is crucial for:
- Evaluating coal preparation and cleaning processes.
- Predicting potential sulfur emissions from coal and coke combustion or conversion.
- Setting trade specifications and pricing based on sulfur content.
Details of the standard:
- ASTM D4239 actually encompasses three alternative procedures:
- Gravimetric method: Measures the weight of sulfur dioxide (SO2) evolved during combustion and calculates the sulfur content.
- Titrimetric method: Captures SO2 in an absorbing solution and determines the sulfur content through titration.
- Infrared (IR) spectroscopic method: Analyzes the SO2 concentration in the combustion gas using an IR spectrometer.
- Each method has its own specific equipment, reagents, and procedures outlined in the standard.
Full Name
ASTM D4239 – Standard Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-Temperature Tube Furnace Combustion
Keywords
sulfur content; coal; coke; tube furnace combustion