Preliminary Study of Calorific Value Increase on Lignite Coal Using Dialkyl Carbohydrate Biosurfactant

Mahreni, Mahreni and Puspitasari, Mitha (2020) Preliminary Study of Calorific Value Increase on Lignite Coal Using Dialkyl Carbohydrate Biosurfactant. The Journal of Pure and Applied Chemistry Research, 2020, 9 (2), 125-132 31 August 2020, Universitas Brawijaya. (Unpublished)

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Abstract

Indonesian coal consumption is dominated by a low-grade coal quality, and supplied from
local coals mining which was composed of lignite. A technological breakthrough has to be
main objective to convert low grade coal into upper-class coal. This paper reports on
improving the quality of lignite coal by washing with biosurfactant. Di-alkyl carbohydrates
were tested on coal sizes of 80, 64, 16 and 6 mesh. The optimum biosurfactant applied to
increase the calorific value derived from brown algae, namely isopropyl stearate alginate
(ISA) 0.5%. This was able to improve a calorific value of lignite coal up to 27722.74% or
increased by 11%. The size of the coal also affects the calorific value of lignite coal. Four
coal sizes applied in the study (80, 64, 16, and 6 mesh), indicates coal size 80 mesh has
given the best calorific value improvement. Conversely, the smaller of the coal size,
increase biosurfactant absorption. Thus, improve the washing capability of biosurfactants.
Keywords: biosurfactant, coal, dialkyl carbohydrate, lignite, calorific value

Item Type:	Other
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User:	Dr.Ir., MT Mahreni Mahreni
Date Deposited:	25 Jun 2022 06:34
Last Modified:	15 Jun 2023 08:14
URI:	http://eprints.upnyk.ac.id/id/eprint/30077

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