MaTestLab > Test Standards > ASTM D7582 Standard Test Methods for Proximate Analysis of Coal and Coke by Macro Thermogravimetric Analysis
Last updated 6th March 2025
ASTM D7582 Standard Test Methods for Proximate Analysis of Coal and Coke by Macro Thermogravimetric Analysis
ASTM D7582 is tailored to ascertain moisture, volatile matter, and ash content, and to compute fixed carbon in coal and coke samples. Moisture, determined through this ASTM standard, is pivotal for deriving other analytical outcomes on a dry basis. It can be paired with air-dry moisture loss to determine the total moisture content in coal, which is fundamental for further analytical calculations. Moisture, ash, and volatile matter are the three key parameters calculated by ASTM D7582.
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ASTM D7582 Introduction
ASTM D7582 is designed to determine moisture, volatile matter, and ash content, as well as calculate fixed carbon in coal and coke samples. Moisture, determined through ASTM D7582, serves as the basis for calculating other analytical results on a dry basis. It can be combined with air-dry moisture loss to ascertain the total moisture content of coal, which is crucial for calculating further analytical results.
ASTM D7582 Test Method
Thermogravimetric Analysis
In thermogravimetric analysis, the mass of a sample is continuously measured under controlled atmospheric conditions, either as a function of temperature, time, or both.
Moisture determination
Moisture content is determined by assessing the decrease in mass of the coal or coke sample under specific conditions of temperature, time, atmosphere, sample mass, and equipment specifications.
Volatile Matter Determination
Volatile matter content is determined by quantifying the decrease in mass of the coal or coke sample when subjected to controlled heating conditions.
Ash Determination
Ash content is determined by measuring the mass of the residue remaining after combustion of the coal or coke specimen, following specific conditions regarding specimen mass, temperature, time, atmosphere, and equipment specifications.
D7582 Equipment and Sample Preparation
Specimen Details
ASTM D7582 encompasses the determination of moisture, volatile matter, and ash content, along with the calculation of fixed carbon in coal and coke samples.
Specimen Size
The analysis employs a sample size of approximately 1 gram, with all mass measurements conducted by the system.
D7582 Test Results and Interpretation
Moisture, ash, and volatile matter are the three principal parameters that are calculated by ASTM D7582
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ASTM D7582 Testing
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Tests Related to ASTM D7582
ASTM D7582 is related to tests including ASTM D346 for the collection and preparation of coke specimens, ASTM D3173 for testing moisture content in samples, and ASTM D3174 for the analysis of ash residues in coke samples.
Use of D7582 in Various Industries
It is a widely applied standard in the coal, coke, and energy industries to evaluate fuel quality, optimize combustion efficiency, determine suitability of coke, and aid industries such as cement and lime.
Materials Commonly Tested with D7582
It tests coal and coke for metallurgical, petroleum coke, and grades of lignite, sub-bituminous, and bituminous to meet industry and regulations on performance and emissions standards.
Common Challenges and Troubleshooting in D7582 Testing
Sample preparation, instrument calibration, and errors due to improper furnace temperature control or weight measurements are some of the challenges in testing. Troubleshooting involves regular calibration, strict adherence to protocol, and frequent maintenance of the thermogravimetric analyzer.
Safety and Best Practices in D7582 Testing
High temperatures in macro thermogravimetric analysis require appropriate safety measures such as heat-resistant gloves, eye protection, proper ventilation, routine equipment checks, lab safety protocols, and thorough personnel training to minimize hazards and ensure the accuracy of the test.
Importance of D7582
It is one of the critical standards through which the quality of coal and coke would be appraised, influencing energy production efficiency and environmental compliance. The standard methodology will enable comparison and optimization of resource utilization toward meeting regulatory requirements.
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The required number of samples or specimens should comply with the procedure given in the astm d7582 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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The turnaround time for astm d7582 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm d7582 tested?
You can share your astm d7582 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d7582 test to various testing techniques.
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