Development of Acid Gas Purification for Higher CO2 Capture and Low Energy Consumption
International Congress on Sustainability Science Engineering ICOSSE
Wednesday, May 27, 2015 - 5:30pm to 6:30pm
An integrated acid gas purification process with higher CO2 capture rate is proposed, which is featured by Rectisol® process heat integrated with CO2 multistage compression. Three key factors contribute to CO2 capture rate have been identified, which also serve as the foundation to process energy consumption and cost analysis. Compared with the conventional Rectisol® process, proposed process realize CO2 capture rate of 80-95 %, which remarkably reduce CO2 emission and collect highly concentrated CO2 for further processing and utilization. Energy consumption of the proposed acid gas purification process first decrease and then increase as CO2 capture rate increases. The energy consumption reaches the lowest point of 0.93 GJ/t CO2 when the CO2 capture rate is 80 %. Although CO2 capture rate of the proposed process can be as high as 95 %, a reasonable CO2 capture rate within 80-90 % is recommended to achieve the best economic and environmental performances.