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Preparation and Certification of Indian Reference Material of Bituminous Coal

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Abstract

Certified reference materials (CRMs) are used for evaluating analytical methods, quality assurance and traceability of analytical results to international standards. Bituminous coal is the medium grade coal with high heating capacity and low moisture content. CRM of bituminous coal powder (BND 5101A) has been developed and certified for ash, gross calorific value (GCV),volatile matter (VM) and total sulphur (S) content as 22.16 ± 0.15%; 6114 ± 44 kcal/kg; 29.2 ± 0.36% and 0.71 ± 0.04%, respectively. The sample of coal selected for the purpose is high-rank bituminous type, which was collected from an opencast mine of Central Coalfields Ltd. The work has been carried out jointly by CSIR-Central Institute of Mining and Fuel Research (CSIR-CIMFR), Dhanbad and CSIR-National Physical Laboratory (CSIR-NPL), New Delhi. Proficiency testing (PT) program was carried out among 28 reputed coal laboratories of the country in accordance with ISO/IEC 17043:2010. Based on the performance of laboratories in the PT program, 8 laboratories were selected for inter-laboratory comparison (ILC) program as per ISO 13528:2015. This paper describes the methodology employed for the preparation of a coal reference material, homogeneity, stability studies and the ILC analytical and statistical work performed for the certification of the contents of ash, GCV, VM and total S.

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References

  1. Development and use of reference materials and quality control materials; IAEA, Vienna, IAEA-TECDOC-1350; ISBN 92–0–103303–6, ISSN 1011–4289 (2003).

  2. ISO/IEC 17043:2015, Conformity assessment- General requirements for proficiency testing.

  3. ISO 13528, Statistical methods for use in proficiency testing by inter laboratory comparisons (2015).

  4. ISO 17035, Reference materials - General and statistical principles for certification (2017).

  5. IS 1350 (Part-I), Methods of tests for coal and coke. Part-I-Proximate Analysis (1984).

  6. ISO 1171, Solid mineral fuels - Determination of ash (2010).

  7. ISO 562, Hard coal and coke - Determination of volatile matter (2010).

  8. IS 1350, Part 3, Methods of test for coal and coke: Part-III- Determination of sulphur (1969).

  9. ASTM D4239: 12, Standard test method for sulfur in the analysis sample of coal and coke using high temperature tube furnace combustion.

  10. IS 1350 (Part-II), Methods of test for coal and coke Part 2- Determination of gross calorific value by the bomb calorimetric method and calculation of net calorific value (Second Revision) (2017).

  11. ISO 1928, Solid mineral fuels – Determination of gross calorific value by the bomb calorimetric method and calculation of net calorific value (2009).

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Acknowledgements

The authors are sincerely thankful to Dr. Dinesh K Aswal, Director CSIR-NPL, Dr. Chhemendra Sharma, Chief Scientist and Head, Environmental Sciences and Biomedical Metrology Division, and Dr. R K Kotnala (Rtd) Chief Scientist and Raja Ramanna fellow, CSIR-NPL, for their continuous support and cooperation for the development of Bituminous coal ‘BND 5101A’ (CRM).

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Authors and Affiliations

  1. CSIR-Central Institute of Mining and Fuel Research, Dhanbad, India

    Tarit Baran Das, U. S. Chattopadhyay & P. K. Singh

  2. CSIR-National Physical Laboratory, New Delhi, 110012, India

    D. Soni & K. Singh

  3. Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus, New Delhi, India

    D. Soni

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  1. Tarit Baran Das
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  2. U. S. Chattopadhyay
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  3. D. Soni
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  4. K. Singh
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  5. P. K. Singh
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Correspondence to D. Soni.

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Das, T.B., Chattopadhyay, U.S., Soni, D. et al. Preparation and Certification of Indian Reference Material of Bituminous Coal. MAPAN 36, 129–138 (2021). https://doi.org/10.1007/s12647-020-00403-3

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  • DOI: https://doi.org/10.1007/s12647-020-00403-3

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