We use cookies to enhance your experience. By continuing to browse this site you agree to our use of cookies. More info.

Coal, as it is commonly known, is a solid fossil hydrocarbon fuel material. The gross calorific value of coal is frequently used when determining the total calorific value for a specific amount of coal for fuel value purposes or when establishing the rank of classification of the coal material. The sulfur value and gross calorific value of the coal material is also suitable for determining if the coal material complies to regulatory requirements for industrial fuel use or not.

A representative, even sample is needed (-60 Mesh).

The standard technique used is ASTM D5865.

The following accessories are required for this analysis:

The samples for calibration are LECO 774-208 benzoic acid pellets, or benzoic acid pellets made from NIST 39j.

Table 1. shows the thermochemical corrections performed.

Table 2. shows the system parameters.

The experimental procedure involves preparing the instrument as recommended in the operator's instruction manual, then the TruSpeed technique is chosen for testing. The unit needs to be next conditioned by testing LECO 774-208 benzoic acid pellet.

Calibration involves weighing ~1.0 g benzoic acid pellet into a 774-204 crucible, entering mass and sample identification into the AC600 software and then placing the crucible with the onto the crucible holder of the combustion vessel.

A single cotton thread fuse is then tied to the electrode wire and one end of the fuse is positioned below the sample. The combustion vessel needs to be cautiously closed and then seal the closure ring. Oxygen is then pressurized in the vessel. The vessel is then vessel in a distilled water container to ensure there are no leaks.

The combustion vessel is next placed on the electrode connectors of the loading mechanism. Analysis can be initiated by pressing the green analyze button to start testing. On completion of analysis, the loading machinery will lift.

The vessel is then removed and depressurized. After depressurizing is completed, clean out the inside of the combustion vessel with distilled water and pour the washings into a clean beaker. One to two drops of indicator is added and titrated with sodium carbonate till the endpoint is achieved.

The titrated amount is filled in milliliters into the nitrogen correction column of the AC600 software. For at least five times, steps 4a through 4n is repeatedly performed and the instrument is thus calibrated.

Sample analysis involves measuring ~0.80 g of a coal sample, entering mass and sample identification into the AC600 software and the crucible holding the sample is placed on to the crucible holder of the combustion vessel.

A separate cotton thread fused to the electrode wire is tied and put one end of the fuse on top of the sample. Steps 4e through 4n are repeated for the sample analysis. Steps 5a through 5e are repeated for all coal samples.

Typical results are shown in Table 3:

This information has been sourced, reviewed and adapted from materials provided by LECO Corporation.

For more information on this source, please visit LECO Corporation.

Please use one of the following formats to cite this article in your essay, paper or report:

LECO Corporation. (2019, October 28). Determining the Gross Calorific Value in Coal. AZoM. Retrieved on July 02, 2022 from https://www.azom.com/article.aspx?ArticleID=11824.

LECO Corporation. "Determining the Gross Calorific Value in Coal". AZoM. 02 July 2022. <https://www.azom.com/article.aspx?ArticleID=11824>.

LECO Corporation. "Determining the Gross Calorific Value in Coal". AZoM. https://www.azom.com/article.aspx?ArticleID=11824. (accessed July 02, 2022).

LECO Corporation. 2019. Determining the Gross Calorific Value in Coal. AZoM, viewed 02 July 2022, https://www.azom.com/article.aspx?ArticleID=11824.

Do you have a question you'd like to ask regarding this article?

AZoM speaks with Sona Dadhania, a Technology Analyst at IDTechEx, about the role 3D printing will play in the future of industrial manufacturing.

AZoM speaks with Ania Jolly, Head of Research and Business Engagement at the Henry Royce Institute, about advanced materials progress as well as industry-led initiatives toward sustainable manufacturing.

We spoke with Holiferm, a University of Manchester spin-off hoping to turn home and personal care products green with their eco-friendly biosurfactant products.

This product profile outlines the MAX-iR FTIR Gas Analyzer from Thermo Fisher Scientific.

Learn more about the JAM-5200EBM E-Beam Metal Additive Manufacturing System for 3D Printing.

This product profile outlines the features and benefits of the Contour X - 500 3D Optical Profilometer.

AZoM.com - An AZoNetwork Site

Owned and operated by AZoNetwork, © 2000-2022