Study on chemical absroption absrober with polypropylene packing for Guohua Jinjie CCS demonstration project

The hydrophilic modified polypropylene structured packing could lower the absorber investment in carbon capture process with chemical absorption method. While the pressure drop of the polypropylene packing is higher than that of the stainless steel packing with the same specific surface area. The optimal absorber with polypropylene and stainless steel structured packing for Guohua Jinjie CCS demonstration project was studied in this paper. The contact angle, effective surface area and pressure drop of the hydrophilic modified polypropylene packing 250Y are measured firstly. The economic analysis model which includes absorber investment (shell, packing and other internals) and operating cost (blower and lean solution pump operating expense) is built. The minimum total cost of the absorber with polypropylene packing 250Y and stainless steel packing 125–500Y are obtained. The absorber with stainless steel packing 250X/Y exhibits the lower investment and operating cost among the stainless steel packing. The minimum total cost of the absorber with stainless steel packing 250X/Y is about 0.955 $/t CO₂ under 48% flooding. For the CO₂ absorber of the Jinjie CCS project, the absorber with polypropylene 250Y is just about 59.5% of that with SUS304 250Y. In addition, the absorber investment, blower and pump cost with polypropylene 250Y is 27.37% lower than that with SUS304 material. The hydrophilic modified polypropylene packing 250Y can replace the stainless steel packing from the economic analysis.