Research and design experience of a 150 kt/a CO2 capture and purification project in the Shaanxi Guohua Jinjie power plant

Abstract

There was little research and demonstration experience in large flue gas carbon projects in China. 150 kt/a flue gas CO2 capture project in the Guohua Jinjie power plant, which is the largest-scale flue gas carbon capture project in China, effectively solved this technical bottleneck. The performance of the used compound amine absorbent, phase change absorbent, and the ionic liquid was described, and the compatibility of performance was considered in the project; new energy-saving processes integrated mechanical vapor recompression heat pump, interstage cooling, and split flow desorption. The plane layout of the project was put forward, and the utility consumption of the capture system was analyzed. The paper explained the health, safety, and environmental protection instructions, presented test category tables, and developed energy consumption and economic analyses. The results showed that the renewable energy consumption per unit product was 2.32 GJ/t CO2, the loss of absorbent was less than or equal to 1.0 kg/t CO2, and the total investment (excluding tax) of the project was 13.8398 million yuan. When the CO2 sales price (excluding tax) was 203.43 Yuan/t, the yield was 0 %, and when the CO2 sales price (excluding tax) was 260.949 Yuan/t, the yield was 8 %. The feasibility study research conclusions indicated that the project was technically and economically feasible.