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.

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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 > (S2) Master Theses
Depositing User: Mrs 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

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