Pra Rancangan Pabrik Dimetil Eter dari Metanol Kapasitas 30.000 Ton/Tahun
Abstract
The preliminary design of dimethyl ether for 30,000 ton/year capacities
utilizes methanol of raw material to result dimethyl ether with purity 99.5%. The
process is dehydration of methanol with silica-alumina catalyst to produce
dimethyl ether in fixed bed reactor at 250 Kand 13 atmosphere. This plant is
included high risk plant because processes at high operation condition
(temperature and pressure), another raw material and product are flammable.
ino-70 T2h'S Piant 'S pianned t0 be built in Bontang, East Kalimantan, It covers
10979mof land and needs 145 employees. It works continually for 24 hours/day
and 330 days/year. Process unit requires 41652,7 ton/year of methanol, whereas
utility unit needs 213508,71 kg/hour water for cooling, 1750 kg/hour water for
domestic, 7312,49 kg/hour of steam, 296.86 kW of electricity, 940.33 kg/hour of
fuel oil and 500 kg/hour of pressured air.
The economic evaluation shows Fixed Capital of Rp. 8.073.867 824 +
US$ 2,614,658, Working Capital of Rp. 67.389.796.096 + US$ 51 551 Profit
before taxes Rp. 25.371.971.106, Profit after taxes Rp. 12.685 985 553
Feasibility studies results in Break Even Point (BEP) of 42.80% (BEP requisite in
Indonesia 40% - 60 %), Shut Down Point (SDP) of32.85%, and Discounted Cash
Flow Rate of Return (DCFR) of 20.07%. Mean while Return On Investment
Before Taxes (ROI„) of 69% (ROIb requisite for high risk plant > 44%) and
Return On Investment After Taxes (ROIa) of 35%. along with Pay Out Time
Before Taxes (POTb) of 1.27 years (POTb requisite for high risk plant < 2years)
and Pay Out Time After Taxes (POTa) of 2.25 years in a row. Based on this
economic evaluation, it can be concluded that dimethyl ether Plant of 30 000
ton/year is economically feasible.
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- Chemical Engineering [1174]