Last updated 19th June 2024

ASTM D4208 Standard Test Method for Total Chlorine in Coal by the Oxygen Vessel Combustion

The ASTM D4208 standard test method determines coal's total chlorine content. Coal's chlorine concentration can help assess slagging issues, prevent corrosion in engineering operations, and analyze coal and coke as a whole. This approach allows for the quantitative retention of chlorine during the combustion of coal samples, which helps in the detailed analysis of coal samples.

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    Introduction to ASTM D4208

    A sample is burned in an oxygen vessel to produce chlorine fumes, which may be used to calculate the total chlorine content of coal according to ASTM D4208. An ion-selective electrode tests the chloride ions after the collected vapors have been washed into water. This test procedure is essential for assessing slagging problems in engineering operations, and carrying out thorough studies of coal and coke. The quantitatively retained chlorine provides essential information about the composition and possible industrial uses of the coal sample by representing the overall chlorine concentration of the whole sample. MaTestLab is one of the best testing service providers, with the best network of testing laboratories in the USA to carry out ASTM D4208 tests for our clients. 

    ASTM D4208 Test Methods

    Apparatus SetupIon-specific meters, electrodes, analytical balance, firing wire and firing circuit, water bath, combustion vessel, and combustion crucibles
    Measurements MethodsApproximately 1 g of coal sample is weighed into a crucible for burning in the ASTM D4208 procedure. To capture acidic vapors, the mass is lowered to 0.5 g for samples containing more than 5% sulfur. The sample is combined with a 2% Na2CO3 solution in a combustion vessel that has oxygen inside of it at a pressure of 2.0 to 3.0 MPa. In order to prevent dangers, precautions include a fire-late oxygen entry, meticulous examination of vessel parts, and adherence to manufacturer instructions. To aid in vapor absorption, the vessel is cooled in a water bath for fifteen minutes following the fire.

    ASTM D4208 Specimens

    Specimen DetailsThe sample to work with is air-dried coal, which is ground up to fit through a 250 µm screen.
    Specimen PreparationThe coal sample is mixed well, and 1 g (±0.1 mg) of the sample is weighed out and placed into a crucible that has already been lit so that it may burn. To guarantee the quantitative preservation of acidic vapors after burning, the sample mass is lowered to 0.5 g (±0.1 g) if the sulfur concentration exceeds 5%. 
    Specimen DimensionsThe dimensions are set in accordance with the ASTM protocol. 

    ASTM D4208 Test Results

    ASTM D4208 determined the total chlorine concentration of the coal samples.. Elevated chlorine levels in coal can cause slagging problems in boilers and furnaces during combustion, impacting productivity and maintenance needs. ASTM D4208 helps evaluate slagging problems and assess corrosion. It also helps in comprehensive coal analysis. 

    Tests Related to ASTM D4208

    ASTM D1974 and ASTM D5118 are two tests related to ASTM D4208. They offer various procedures for sealing, closing, and reinforcing fiberboard boxes and manufacturing fiberboard boxes for packaging and transport, respectively.

    FAQ's

    Where can I get the astm d4208 tested?

    You can share your astm d4208 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 d4208 test to various testing techniques.

    How much do I need to pay for the astm d4208 test?

    Please contact us for a detailed quote for your astm d4208 testing needs. Cost incurred to carry out different astm d4208 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.

    How many samples are required for astm d4208?

    The required number of samples or specimens should comply with the procedure given in the astm d4208 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.

    How much discount can I get on the astm d4208 test?

    MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.

    How many days will it take to complete the astm d4208 test?

    The turnaround time for astm d4208 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 d4208 tested?

    You can share your astm d4208 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 d4208 test to various testing techniques.

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