INFLUENCE OF MICROSCOPY COMPOSITION AND CHEMICAL COMPOSITION OF COAL TO THE FREE SWELLING INDEX ANALYSIS AS ONE OF THE CONCLUSIVE PARAMETER COKEABILITY OF COAL FROM MURUNG RAYA.

• Main Author: Zahar, Wahyudi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/78504
• Institution: Institut Teknologi Bandung

Twenty samples set of coal from Murung Raya area were collected to determine the value of free swelling index (FSI), microscopy composition, and its chemical composition. The outcomes of analysis were used to investigate the degree of influence from several parameters (i.e. reflectance vitrinite, maceral composition, moisture, ash, volatile matter, fixed carbon, carbon, hydrogen, nitrogen, oxygen, and total sulphur) to the value of FSI. Moreover, the results of the analysis were also used to estimate the generation of natural coke in geological nature at Murung Raya area. All samples were obtained from core drill hole and channel sampling technique which selected based on variety of lithotype within five different coal seams. The FSI posses value ranging from 1 to 7.5, it is considered that microscopy and chemical composition of coal as conclusive parameters. Whilst, local and regional geological structure have some effects to the physical and chemical properties of coal in nature which interpreted to be a kind of factor for natural coke generation. The simply statistical of linear regression analysis was performed to determine the correlationship between the microscopy analysis (i.e. vitrinite reflectance (???? ? r) and maceral composition) and chemical analyses (i.e. proximate and ultimate) to the results of FSI analysis. The present study revealed that only three dominant parameters have significant effect to value of FSI which consist of moisture (r = -0.52), fixed carbon (r = +0.62), and carbon (r = +0.57). On the basis of the laboratory approach that has been done, the thermal effects of local geological structures, especially for Intrusion Sintang has no significant effect to physical and chemical of coal which can turn it into natural coke.