KARAKTERISASI PRODUK PENCAIRAN BATUBARA BUKIT PINANG SAMARINDA ULU DAN KAITANNYA DENGAN BIOMARKA BATUBARA

FEBRIATI, ANIS (2014) KARAKTERISASI PRODUK PENCAIRAN BATUBARA BUKIT PINANG SAMARINDA ULU DAN KAITANNYA DENGAN BIOMARKA BATUBARA. Masters thesis, Institut Teknologi Sepuluh Nopember.

Text 1412201009-Master_theses.pdf - Published Version Restricted to Repository staff only Download (1MB) | Request a copy

Abstract

Karakter geokimia batubara sub-bituminus Bukit Pinang Samarinda Ulu,
Kalimantan Timur menunjukan bahwa batubara tersebut tergolong batubara dengan
kematangan termal dan kalori yang rendah (6158 kkal/kg). Batubara ini dicairkan
dalam reaktor autoclave 1L selama 60 menit pada suhu 450 οC dan tekanan 12 MPa
untuk memperoleh produk slurry. Produk slurry selanjutnya di fraksinasi berdasarkan
titik didih menggunakan alat distilasi vakum 10 mmHg. Fraksi-fraksi yang diperoleh
antara lain nafta, Light Oil, Middle Oil, heavy Oil, dan Coal Liquid Bottom. Data
prosentase berat menunjukan bahwa produk pencairan didominasi oleh fraksi Heavy
Oil dan Coal Liquid Bottom dengan prosentase total > 50%. Fraksi Light Oil dan
Middle Oil di fraksinasi lebih lanjut menggunakan KLT dan eluen n-heksana agar
diperoleh fraksi alifatik dan aromatik. Komposisi senyawa hidrokarbon fraksi alifatik
dan aromatik nafta, Light Oil dan Middle oil dikarakterisasi menggunakan
Kromatografi Gas-Spektrofotometer Massa (KG-SM). Hasil karakterisasi
menunjukan keberadaan senyawa n-alkana dengan rentang karbon C10-C26, alkana
bercabang (C9-C11), sikloheksana (C7-C15), turunan alkilbenzena (C8-C15), alkilfenol
turunan naftalena, turunan flourena, isomer-isomer dimetil bifenil, fenantrena, dan
turunan pirena. Senyawa–senyawa tersebutdiperkirakan berasal dari perengkahan
panas (Thermocracking) dan penataan ulang radikal makromolekul batubara yang
berasal dari kontribusi tumbuhan tingkat tinggi Angiospermae dan Gymnospermae
dalam lingkungkan pemendaman anoksik. Dominasi fraksi berat dari produk
pencairan memberikan gambaran bahwa metode pencairan yang digunakan kurang
optimal untuk memperoleh produk cair dari batubara ini.

============================================================

Geochemical characteristicr of sub-bituminus coal from Bukit Pinang Samarinda
Ulu, East Kalimantan showed that it is classified as coal with low thermal maturity
and calorific value (6158 kcal / kg). Coal was liquified in 1L autoclave reactor for 60
minutes at 450 C and 12 MPa to obtain slurry product. Slurry products was further
fractionated based on boiling point using a 10 mm Hg vacuum distillation. Obtained
fractions include naphtha, Light Oil (LO), Middle Oil (MO), Heavy Oil (HO), and
coal Liquid Bottom (CLB). The weight percentage data showed that liquifaction
product were dominated by factions Heavy Oil and Coal Liquid Bottom with a total
percentage more than 50%. Light Oil and Middle Oil are further fractionated by TLC
and eluent n-hexane to obtain the aliphatic and aromatik fractions. The composition
of aliphatic and aromatik fraction in naphtha, Light Oil and Oil Middle were
characterized using Gas Chromatography-Mass Spectrophotometer (GCMS). The
result of GCMS characterizations showed the presence of compounds such as nalkanes
with carbon range C10-C26, branched alkane (C9-C11), cyclohexanes (C7-C15),
(C7-C15), alkylbenzenes derivatives (C8-C15), alkylphenols, naphthalene derivatives,
flourene derivatives, isomers dimethyl biphenyl, phenanthrene, and derivatives of
pirena. These compounds were thought to originate from thermal cracking and radical
rearrangement of the coal macromolecules. The dominance of heavy fraction
suggested that the liquefaction method was less than optimal to obtain liquid product
from the coal used

Item Type:	Thesis (Masters)
Additional Information:	RTKi 553.2 Feb k
Uncontrolled Keywords:	batubara cair,fraksi alifatik, fraksi aromatik, karakter batubara
Subjects:	Q Science > QD Chemistry
Divisions:	Faculty of Mathematics and Science > Chemistry > 47101-(S2) Master Thesis
Depositing User:	Anis Wulandari
Date Deposited:	11 Jan 2017 04:38
Last Modified:	11 Jan 2017 04:38
URI:	http://repository.its.ac.id/id/eprint/1473

Actions (login required)

View Item