Application of CO2 Capture from Coal Chemical Industry in Northwest China

Abstract

In order to reduce greenhouse gas emissions from coal chemical industry in Northwest China, Yanchang Petroleum has deployed and developed a carbon dioxide capture project at one of its affiliated coal chemical plant in Yulin, Northwest China. The CO2 capture unit was built at a 200,000 t/a coal to acetic acid chemical plant. The CO2 is captured from coal gasification process using a Rectisol process, finally compressed and stored in liquid state with a pressure of 2.3 Mpa and a temperature at -17 ℃. 50,000 t/a of high concentration CO2 (>99%) was captured, and delivered to the Jingbian and Wuqi CCUS pilot sites by truck tanker for CO2-EOR and geological storage projects. The CO2 capture cost is less than 18 USD/t CO2 (<120RMB/t CO2). So far, operation of capture unit is stable with low energy consumption. This paper briefly reviews the process, technical details and cost of this CO2 capture project.