3. It has been decided that growing demand for ethylene from refinery gases warrants expansion of an existing plant from 200 000 t/y to 260 000 t/y. It has been proposed that if production were increased instead to 300 000 t/y then the excess ethylene could be transformed into 65 000 t/y of ethanol. Use ratio techniques to obtain estimates for a. the cost of the smaller plant expansion b. the cost of the proposed (larger)plant expansion c. the cost of the proposed ethanol plant d. the cost of a separate ethylene plant to feed the ethanol plant e. What is the best option? What is the cost saving achieved? Data Compound Typical plant InvestmentScale EthanolFrom ethylene: direct hydration75 0007 500 000 0.72 Ethylene Refinery gases or hydrocarbons 300 000 30,000,000 0.68 Route, Source size ty cost exponent or via ethyl sulphuric acid 3. It has been decided that growing demand for ethylene from refinery gases warrants expansion of an existing plant from 200 000 t/y to 260 000 t/y. It has been proposed that if production were increased instead to 300 000 t/y then the excess ethylene could be transformed into 65 000 t/y of ethanol. Use ratio techniques to obtain estimates for a. the cost of the smaller plant expansion b. the cost of the proposed (larger)plant expansion c. the cost of the proposed ethanol plant d. the cost of a separate ethylene plant to feed the ethanol plant e. What is the best option? What is the cost saving achieved? Data Compound Typical plant InvestmentScale EthanolFrom ethylene: direct hydration75 0007 500 000 0.72 Ethylene Refinery gases or hydrocarbons 300 000 30,000,000 0.68 Route, Source size ty cost exponent or via ethyl sulphuric acid