Kiky Corneliasari Sembiring
Research Center for Chemistry, Indonesian Institute of Science, Kawasan Puspiptek Serpong, Tangerang Selatan 15314, Banten

Published : 5 Documents
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Journal : Jurnal Kimia Terapan Indonesia

Nickel Supported Natural Zeolite as a Bifunctional Catalysts for Conversion of Citronella Oil Crude to Menthols Pertiwi, Ralentri; Tursiloadi, Silvester; Adilina, Indri Badria; Sembiring, Kiky Corneliasari; Oaki, Yuya
Jurnal Kimia Terapan Indonesia (Indonesian Journal of Applied Chemistry) Vol 18, No 02 (2016)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (230.308 KB) | DOI: 10.14203/jkti.v18i02.78

Abstract

Characterization and catalytic activity of modified natural zeolite for the conversion of citronella oil to menthol was investigated. In this research, natural zeolite was prepared by acid activation with HCl and impregnated with Ni metal. The addition of Ni metal of around 12.5 nm in diameter provided a bifunctional catalyst for two steps of citronella oil conversion i.e. cyclization and hydrogenation. The process was performed in a one-pot reaction system by stirring at 200oC with pressure of 20 bar H2 for 3h. The reaction products changed slightly with varieties of reaction temperature and amount of catalysts employed. Results showed that Ni/NZB-HT catalyst was the best catalyst which was able to convert citronella oil to menthol with a selectivity of 50% menthol and 100% conversion of citronellal.
HIDROLISIS LIGNOSELULOSA PELEPAH DAN TANDAN KOSONG KELAPA SAWIT DENGAN KATALIS ZIRKONIA TERSULFATASI Kristiani, Anis; Sembiring, Kiky Corneliasari; Abimanyu, Haznan; Aulia, Fauzan
Jurnal Kimia Terapan Indonesia (Indonesian Journal of Applied Chemistry) Vol 15, No 2 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2609.593 KB) | DOI: 10.14203/jkti.v15i2.112

Abstract

Lignocellulosic biomass which are frond and empty fruit bunches (EFB) is second generation raw material for ethanol production. Lignocellulose usage is expected to create a green process. Utilization of lignocellulose materials into ethanol involved four main processes, i.e pretreatment, hydrolysis/sacharification, fermentation, distillation and dehydration ethanol that was product. This research aims to optimize hydrolysis process of EFB and frond by using sulfated zirconia catalyst characterized its physical and chemical properties as a solid acid catalyst. Catalytic hydrolysis process conducted at 160 DCfor 3 hours gave the highest TRS (Total Reducing Sugar) which is 17,51 % for EFB while for frondfor 2 hours which is 19,23 % .Keyword: Hydrolysis, solid acid catalyst, lignocellulose, frond, EFB, sulfated zirconia
Carbonization of Palm Oil Empty Fruit Bunch (EFB) in Hydrothermal Processes to Produce Biochar Sarwono, Rakhman; Tursiloadi, Silvester; Sembiring, Kiky Corneliasari
Jurnal Kimia Terapan Indonesia (Indonesian Journal of Applied Chemistry) Vol 18, No 02 (2016)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.746 KB) | DOI: 10.14203/jkti.v18i02.46

Abstract

ABSTRACT Empty fruit bunch (EFB) of palm oil is a waste from the palm oil industries which in a large amount, those waste is not properly utilized yet. EFB is a lignocelluloses waste as a polymer with big molecule such as cellulose, lignin, and hemicelluloses that can be degraded into smaller molecules in hydrothermal carbonization (HTC) process. The HTC process of EFB will result three fractions such as gas, organic water soluble and biochar as solid residue or bio-char-water-slurry. EFB degradation is influenced by the operation conditions such as temperature, pressure, catalysts, reaction time, stirring and ratio liquid and solid. The HTC process involved many routes of reaction such as liquefaction, hydrolysis, dehydration, decarboxylation, condensation, aromatization, and polymerization. In this experiment 60 ml closed vessel was used as the HTC reactor to degrade of EFB. EFB concentration of 6.44% resulted 62% of conversion. Reaction time of 6 hours resulted 62 % of conversion. Increasing the reaction time and temperature increase the conversion of EFB. Liquid products of organic water soluble has cleared yellow color, after several hours the color become darkness that is further reaction still occurs in that solution. Solid products is biochar as brown coal, that can be easily separated and processed into powder, pellet or briquette form with outstanding storage and transport characteristics. For further economic development, biochar with excellent transport characteristics, the possibility of exporting this commodity to the worlds energy market is possible. Key words: EFB, hydrothermal, carbonization, conversion, biochar