ABSTRACT This report presents the design details and economic analysis of a coal-based dimethyl ether (DME) plant. The plant is planned to be built in Peranap, Indragiri Hulu, Riau, Indonesia, due to the abundant coal resources available near the site. The plant is designed to produce 210,000 tons of DME per year, with a coal feedstock requirement of 581,383 tons per year. DME production is fo…