Demineralisasi Batubara Berkadar Abu Tinggi dengan Leaching Menggunakan Alkali

Mifta Aulia Ikhsana, Muhammad Mufti Azis, Suryo Purwono

Abstract


The study was comdustred on the demineralization of Jambi coal with high ash content as an effort to improve quality. The coal selected first crushed to -80 + 115 mesh. Demineralization was carried out using leacjing process with NaOH 20, 25, and 30% (%weight). The best parameter was used in subsequent leaching process to determine the effect of temperature of 50, 70, 90oC. The result showed that the percentage of demineralization increased with increasing demineralization reduction 34%

Keywords


demineralization; leaching; ash; NaOH

Full Text:

PDF

References


Behera SK, ChakrabortyS, Meikap BC. Chemical demineralization of high ash indian coal by using alkali and acid solutions. Fuel 2017a; 196: 102-109.

BeheraSK, Chakraborty S, Meikap BC.Demineralization mechanism and influence of parameters on high ash indian coal by chemical leaching of acid and alkali solution. Int J Coal Sci Technol 2018; 5:142–155.

CiuL, Guo Y, Wang X, Du Z, ChengF. Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid. Chin J Chem Eng 2015; 23(3): 590–596.

Dash PS, Lingam RK, Kumar SS, Suresh A. Banerjee PK, Ganguly S. Effect of elevated temperature and pressure on the leaching characteristics of indian coals.Fuel 2015a; 140: 302–308.

Dash PS, Sriramoju SK, Kargupta K, Banerjee PK,Ganguly S.Characterization of chemical beneficiated indian coals.Int JCoal Prep Util2015b; 35(5): 257–272.

Levenspiel. Chemical reaction engineering – 3rd edition. New York: John Wiley & Sons. 1999: 569-571.

GulenJ, Doymaz I, Piskin S, Toprak S.Removal of mineral matter from silopi-harput asphaltite by various acid treatment. Energy Source Part a Recov Util Environ Effects2005; 27(15): 1457–1464

MaX, Zhang M, Min F. Study of enhanced low-quality coal oxidative desulphurization and deashing by using HNO3 and microwave pretreatment. Environ Technol2014; 35: 36–41.

Meshram P, Purohit BK, Sinha MK, Sahu SK, Pandey BD.Demineralization of low grade coal – areview. Renewable and Sustainable Energy Reviews 2015; 41: 745-761.

Mukherjee S, Borthakur PC. Chemical demineralization/desulphurization of high sulphur coal using sodium hydroxide and acid solutions. Fuel 2001; 80(14): 2037–2040.

AOAA. The NOAA annual greenhouse gas index (AGGI), 2022. https://gml.noaa.gov/aggi/aggi.html (diakses 13 Mei 2023)

Ryberg MW, Owsianiak M, Laurent A, Hauschild MZ. Power generation from chemically cleaned coals: do environmental benefits of firing cleaner coal outweigh environmental burden of cleaning?. Energy Environ Sci 2015; 8: 2435–2447.

Salvatore V. Demineralization and desulfurization process to generate clean coal. Chemical Engineering Transactions; 21: 1489-1494.

Sriramoju SK, Dash PS, Suresh A, Ray T. Integrated process for coal chemical demineralization and spent caustic regeneration - a pilot scale study. Journal of Cleaner Production 2021; 327: 1-12.

Waugh AB, Bowling KM.Removal of mineral matter from bituminous coals by aqueous chemical leaching. Fuel Process Technol 1984; 9(3): 217

Wu Z, and SteelKM.Demineralization of a UK bituminous coal using HF and ferric ions. Fuel 2007; 86: 2194-2200


Refbacks

  • There are currently no refbacks.
slot gacor slot gacor hari ini slot gacor 2025 demo slot pg slot gacor slot gacor