IMPROVEMENT OF LOW RANK COAL PROPERTIES BY VARIOUS UPGRADING PROCESSES
DOI:
https://doi.org/10.30556/imj.Vol14.No1.2011.505Keywords:
low rank coal, inherent moisture, calorific valueAbstract
A low rank coal from Banko, South Sumatera was used to study the properties improvement of the coal due to coal upgrading process. Various coal upgrading processes were conducted i.e. upgraded brown coal (UBC), hot water drying (HWD) and steam drying (SD). The UBC process was carried out in pilot scale with a capacity of 5 tons/day at temperature of 160°C and pressure of 0.35 MPa, while the HWD and SD pro- cesses were conducted in laboratory scale using autoclave at the temperature of 300ºC and pressure of about 12 MPa for 1 hour. The result indicates that the properties of Banko coals after the UBC, HWD and SD processes were improved. The calorific value of the upgraded coals was significantly increased in relevant to the decreasing of inherent moisture content and have better combustion characteristics than that of the raw coal. The highest calorific value can be achieved by SD process, followed by HWD and UBC processes.
References
Allardice, D. J., Clemow, L. M., Favas, G., Jackson,
W. R., Marshall, M. and Sakurovs, R., 2003. The characterization of different forms of water in low rank coals and some hydrothermally dried prod- ucts, Fuel, 82, p. 661 – 667.
Annual Book of ASTM Standards, 2005. Copyright ASTM International, 05.06, Section Five; Gaseous Fuels, Coal and Coke, 100 Barr Harbor Drive, West Conshohocken, USA.
Artanto, Y., McDonnell, E., Verheyen, T. V., Adeloju, S. and Chaffee, A. L., 2009. The remediation of MTE water by combined anaerobic digestion and chemical treatment, Fuel, 88, p. 1786–1792.
Bergins, C., 2003. Kinetics and Mechanism During Mechanical/Thermal Dewatering of Lignite, Fuel, 82, p. 355–364.
Bongers G. D., Jackson, W. R. and Woskoboenko, F., 2003. Pressurised Steam Drying of Austra- lian Low-Rank Coals Part 2. Shrinkage and Physi- cal Properties of Steam Dried Coals, Prepara- tion of Dried Coals With Very High Porosity, Fuel Processing Technology 64-2000, p. 13–23.
Chen, Z., Wu, W. and Agarwal, P. K., 2000. Steam- Drying of Coal. Part 1. Modeling The Behavior of a Single Particle, Fuel, 79, p. 961–973.
Couch, G. H., 1990. Lignite Upgrading, IEA Coal Research. IEACR/25.
Crelling, J. C., Hippo, E. J. and Woerner, B. A., 1992. Combustion Characteristics of Selected Whole Coals and Macerals, Fuel, 71, p. 151-158.
Deguchi, T., Shigehisa, T. and Shimasaki, K., 1999. Study on Upgraded Brown Coal Process for In- donesian Low Rank Coals, Proc. International Conference on Clean and Efficient Coal Tech- nology in Power Generation, Indonesia, p. 176- 180.
Hulston, J., Chaffee, A. L., Bergins, C., and Strauâ, K., 2004. Comparison of Physico-Chemical Properties of Various Lignites Treated by Me- chanical Thermal Expression, Coal Preparation, 25-4, p. 269-294 .
Indonesian Government Regulation Number 45 Year 2003 about the Rates of Non Tax Revenues at the Department of Energy And Mineral Re- sources.
Kamandanu, B., 2010. Potential for Government In- centives in Developing Indonesian Coal Re- sources, the 2nd Coaltrans Upgrading Coal Fo- rum, The Grand Hyatt Jakarta, 21-22 Septem- ber 2010.
Lignite of America, 1995. Chapter 10, Beneficiation of Lignite, Coal Science and Technology, 23, p. 451-504.
Ma, S., Hill, J. O. and Heng, S. J., 1989. Study of the Combustion Characteristics of Victorian Brown Coal, Journal of Thermal Analysis, 35, p. 1985- 1996.
Mahidin, T., Usui, H., Ishikawa, S, and Hamdani, 2002. The Evaluation of Spontaneous Combus- tion Characteristics and Properties of Raw and Upgraded Indonesian Low Rank Coals, Coal Preparation, 22, p. 81-91.
Mahidin, T., Ogaki, Y., Usui, H. and Okuma, O., 2003. The Advantages of Vacuum-Treatment In the Thermal Upgrading of Low-Rank Coals on the Improvement of Dewatering and Devolatilization, Fuel Processing Technology, 84, p. 147– 160.
Miura, K., Mae, K., Ashida, R., Tamura, T. and Ihara, T., 2002. Dewatering of Coal Through Solvent Extraction, Fuel, 81, p. 1417-1422.
Mursito, A. T., Hirajima, T. and Sasaki, K., 2010. Up- grading and Dewatering of Raw Tropical Peat by Hydrothermal Treatment, Fuel, 89, p. 635–641.
Ohki, A., Xie, X. F, Nakajima, T., Itahara, T. and Maeda, S., 1999. Change in Properties and Combus- tion Characteristics of an Indonesian Low Rank Coal Due to Hydrothermal Treatment, Coal Prepa- ration, 21, p 23-34.
Sakaguchi, M., Laursen, K., Nakagawa, H. and Miura, K., 2008. Hydrothermal Upgrading of Loy Yang Brown coal — Effect of Upgrading Conditions on The Characteristics of The Products, Fuel Pro- cessing Technology, 89, p. 391-396.
Shigehisa, T., Deguchi, T., Shimasaki, K. and Makino, E., 2000. Development of UBC Process. Proc. International Conference on Fluid and Thermal Energy Conversion, Indonesia.
Suhala, S., 2010. Current and Future Coal Situation
: Supply & Demand and Price Mechanism, Pre- sented at : Focus Group Discussion on Upgraded Brown Coal, Kartika Chandra, Jakarta.
Tamura, M., 2010. New Utilization Technologies for Low Rank Coals, Proc. 1st International Sympo- sium on Low Rank Coals, Innovation and Tech- nologies for a Sustainable Future, Grand Hyatt Melbourne, Australia.
Umar, D. F., Suganal, Priyono, H., Nuroniah, N., Sodikin, I., Supriatna, W., Rijwan, I., Rustomo, G., Syahrial, Hernawati, T., Astiti, M. W., Atmini, S., Paidi, Rohayati, T., Agustiana, L., Somadi, E. dan Aat, 2003. Uji Coba Peningkatan Kualitas Batubara Peringkat Rendah Dengan Proses UBC (Upgraded Brown Coal) Palimanan, Cirebon, Laporan Litbang tekMIRA No: 09.
Umar, D. F., 2007. Development of Low Rank Coal Upgrading and Upgraded Brown Coal Water Mix- ture Preparation Technologies, Kobe University, Doctoral Dissertation.
Usui, H., Mahidin, T. and Umar, D. F., 2004. Upgrading by Kobe University Process and Control of Spon- taneous Combustion of Low Rank Coals, Proc. 21st International Pittsburgh Coal Conference, Osaka, Japan.
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