This document presents a conceptual study and basic design for an ethylene production plant in Esfahan, Iran. The study examines various methods for producing ethylene including converting methanol, dimethyl ether, ethanol, and cracking ethane and naphtha. Ethane cracking is identified as the preferred method due to its lower energy consumption. The proposed plant would have a capacity of 1 million tons per year, which is in line with Iran's domestic demand and existing ethylene production capacity. Technical aspects of the process such as the catalyst and overall process description are also discussed.