Susila Arita Rachman, Susila Arita
Unknown Affiliation

Published : 2 Documents

Found 2 Documents

Characterization of Activated Carbon from Coal and Its Application as Adsorbent on Mine Acid Water Treatment Hardianti, Siti; Rachman, Susila Arita; E.H., Harminuke
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 2 (2017): June 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i2.34


Anthracite and Sub-bituminous as activated carbon raw material had been utilized especially in mining field as adsorbent of dangerous heavy metal compound resulted in mining activity. Carbon from coal was activated physically and chemically in various temperature and particle sizes. Characterization was carried out in order to determine the adsorbent specification produced hence can be used and applied accordingly. Proximate and ultimate analysis concluded anthracite has fixed carbon 88.91% while sub-bituminous 49.05%. NaOH was used in chemical activation while heated at 400-500°C whereas physical activation was conducted at 800-1000°C. Activated carbon has high activity in adsorbing indicated by high iodine number resulted from analysis. SEM-EDS result confirmed that activated carbon made from coal has the quality in accordance to SNI and can be used as adsorbent in acid water treatment.
Pengaruh Katalis NiMo Terhadap Kualitas Minyak Batubara Hasil Pencairan Tidak Langsung Damayanti, Rika; Rachman, Susila Arita; Hadiah, Fitri
Al-Kimia Vol 7, No 1 (2019)
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v7i1.6560


Coal is a fossil energy source that is widely used as a soild fuel in many sectors. The development of indirect coal liquefaction technology is one type of technology used to convert coal into a liquid fuel product in the form of coal oil with characteristics resemble petroleum fuels. Coal oil production can be an alternative fuel source for future energy needs. In this study, the indirect liquefaction process of coal (calorific value = 6400 kcal/kg) was done in the fluidized bed reactor by heating the reactor with an electric furnace, where the process took place at temperature 350oC - 500oC and the catalyst weight was varied into 0%, 5%, 10%, and 15%. Air with a flow rate 2 LPM is flowed during the process and the lenght of the process was 60 minutes. From this research, the best characteristics of coal oil produced at a temperature of 400oC - 450oC with a catalyst weight of 15%. The characteristics of the coal oil obtained have a density of 0.852 g / cm3, specific gravity of 0.853 and oAPI gravity of 34.41. The results of GC-MS analysis was known that 46.15% of the composition of hydrocarbons in coal oil is the fraction of gasoline.