| dc.description.abstract | Dimethyl ether (DME) as a clean renewable energy have a very wide application which can be use on solvent, LPG substitute and fuel transportations. Beside that dimethyl ether is used for aerosol propellant in consumer products such as hairspray, insect repellent and air freshner. For sufficient of domestic needs and a chance of export, the chemical plant could be built with capacity of 50.000 tons/year. Regard to several aspects including aspects of raw material supply, transportation, labor, marketing and utilities, location for plant in Bontang, East Kalimantan are chosen with an area of 10,979 m2. The factory is planned in the management of the Limited Liability Company with a total of 145 emplpoyees led by a president director. Raw materials needed were methanol 99.85% 69,686.525 tons/year.
The process method was dehydration of methanol with silica-alumina catalyst to produce dimethyl ether held in gasses phase in fixed bed multitube reactor at 290 oC and 13 atmosphere. Whereas utility unit needs 61,362.195 kg/hour water, 16,748.248 kg/hour of steam, 1,230.700 kg/hour of fuel oil, 26.400 m3/hour of pressured air and power electricity about 136.932 kWh provided by PLN a generator as reserve. This plant produced dimethyl ether with 99.95% of purity.
This dimethyl ether plant cost were needed Rp 145,565,585,146 as fixed capital and working capital about Rp 178,987,658,461, profit before taxes was Rp 67,954,211,656, profit after taxes was Rp 33,977,105,828. The economic analysis of this chemical factory showed that precentage of Break Even Point (BEP), Shut Down Point (SDP), and Discounted Cash Flow Rate of Return (DCFR) were 50.60%, 37.90%, and 19.04%. Meanwhile Return On Investement (ROI) before taxes was 46.68% while ROI after taxes was 23.34%. Along with Pay Out Time (POT) before taxes was 1.76 years while POT after taxes was 3.00 years in a row. Respectively on the factors, it could be concluded that preliminary plant design of dimethyl ether with capacity 50,000 tons/year was feasible to be built. | en_US |
