Geochemical characterization of Kutai Basin coals using proximate and ultimate analysis

[摘要] This study aims to determine the characteristic of Kutai Basin coals on chemical composition parameter through proximate and ultimate analysis. Coal samples are taken from the Kutai Basin, where in this basin there are two formations containing coal, namely Pulaubalang and Balikpapan Formation. The methods used proximate and ultimate analysis. The statistical analysis of the results show the average concentration of moisture as 13.4 %, ash content as 5.8 %, volatile matter as 40.6 %, and fixed carbon as 40.2 % on Pulaubalang Formation and the average concentration of moisture as 14.0 %, ash content as 4.5 %, volatile matter as 40.8 %, and fixed carbon as 40.6 % on Balikpapan Formation. The increased volatile contents are characteristic of lower-rank coals, while the decreased values are indicative of higher-rank coals. The statistical analysis of the results show the average concentration of carbon as 63.21 %, hydrogen 6.10 %, nitrogen as 1.30 %, sulphur as 0.67 %, and oxygen as 22.96 % on Pulaubalang Formation and the average concentration of carbon as 59.24 %, hydrogen 5.92 %, nitrogen as 1.34 %, sulphur as 1.23 %, and oxygen as 27.75 % on Balikpapan Formation. The analytical results suggest the existing coal on Pulaubalang and Balikpapan Formation are of sub-bituminous A coal rank. Moreover proximate and ultimate analyses when interpreted in detail may form an effective tool to characterize the coals of any area.

[发布机构] Department of Geological Engineering, Universitas Gadjah Mada, Indonesia^1;Department of Mining Engineering, Mulawarman University, Indonesia^2

[效力级别] 矿业工程

[关键词] Analytical results;Average concentration;Chemical compositions;Effective tool;Geochemical characterization;Ultimate analysis;Volatile contents;Volatile matters