+44 1625708989Study the Sensitivity Analysis, Economic Evaluation and Heat Integration of a Plant Producing Dimethyl Ether (DME) from Methanol by using ASPEN HYSIS Simulation
Author(s): Sisay Wondmagegn MollaIn this work aspen HYSYS v8.8 was used to simulate production of DME. Fluid packaging used in this process is NRTL thermodynamic. The production process is threshold problem. based on sensitivity analysis the most sensitives parameter on the DME yield were methanol feed flow rate to distillation column and reactor, tray spacing, percentage recycles methanol and reactor conversion, rector conversion and waster production rate and rector conversion. Reactor conversion above 70% has not significant increase on DME. Also DME production is proportional to methanol feed flow rate. Tray spacing in distillation column and the DME production rate is increasing up to tray spacing of 0.67 and decrease steeply in DME production rate and became constant in DME production above 2. Not recommended to use above 0.67. Total capital cost and Utility cost for total plant were determined. The heat integration of different streams was carried out using heat exchanger network. There is no pinch temperature. Since it is threshold problem is occurred. Only minimum hot utility (Q c min=0 KJ/hr) and minimum hot utility (Q h min=9.296 KJ/hr) are needed to satisfy energy requirements from external source. The production process is threshold problem and the change in delta T min value has not effect on the hot and utility cost.
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