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      https://www.ias.ac.in/article/fulltext/jess/123/06/1439-1449

    • Keywords

       

      Ash Fusion Temperature (AFT); Detrital-authigenic index (DAI); fouling; slagging; abrasion indices.

    • Abstract

       

      In Part 1 of the present investigation, 37 representative Eocene coal samples of Meghalaya, India were analyzed and their physico-chemical characteristics and the major oxides and minerals present in ash samples were studied for assessing the genesis of these coals. Various statistical tools were also applied to study their genesis. The datasets from Part 1 used in this investigation (Part 2) show the contribution of major oxides towards ash fusion temperatures (AFTs). The regression analysis of high temperature ash (HTA) composition and initial deformation temperature (IDT) show a definite increasing or decreasing trend, which has been used to determine the predictive indices for slagging, fouling, and abrasion propensities during combustion practices. The increase or decrease of IDT is influenced by the increase of Fe2O3, Al2O3, SiO2, and CaO, respectively. Detrital-authigenic index (DAI) calculated from the ash composition and its relation with AFT indicates Sialoferric nature of these coals. The correlation analysis, Principal Component Analysis (PCA), and Hierarchical Cluster Analysis (HCA) were used to study the possible fouling, slagging, and abrasion potentials in boilers during the coal combustion processes. A positive relationship between slagging and heating values of the coal has been found in this study.

    • Author Affiliations

       

      Arpita Sharma1 Ananya Saikia1 Puja Khare2 D K Dutta1 B P Baruah1

      1. Coal Chemistry Division, CSIR–North East Institute of Science & Technology, Jorhat 785 006, India.
      2. Agronomy–Soil Division, CSIR–CIMAP, Lucknow 226 015, India.
    • Dates

       
  • Journal of Earth System Science | News

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