title: Parametric analysis of a novel cryogenic CO2 capture system based on Stirling coolers.
abstract: CO(2) capture and storage (CCS) is an important alternative to control greenhouse gas (GHG) effects. In previous work, a novel desublimation CO(2) capture process has been exploited making use of three free piston Stirling coolers (namely, SC-1, SC-2, and SC-3, respectively). Based on the developed system, moisture and CO(2) in the flue gas can condense and desublimate in the prefreezing and main-freezing towers, respectively. Meanwhile, the storage column is chilled by SC-3 to preserve the frosted CO(2), and permanent gas (such as N(2)) passes through the system without phase change. The whole process can be implemented at atmospheric pressure and reduce the energy penalty (e.g., solvent regeneration and pressure drop) in other technologies. In this work, the influence of process parameters has been investigated in detail. The optimal conditions for the system are as follows: idle operating time is 240 min, flow rate is 5 L/min, vacuum degree of the interlayer is 2.2 × 10(3) Pa, and temperatures of SC-1, -2, and -3 are -30, -120, and -120 °C, respectively. Under these conditions, the energy consumption of the system is around 0.5 MJ(electrical)/kg CO(2) with above 90% CO(2) recovery.
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Chun Feng
authors.initials: CF
authors.lastname: Song
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Kitamura
authors.forename: Shu Hong
authors.initials: SH
authors.lastname: Li
authors.forename: Wei Zhong
authors.initials: WZ
authors.lastname: Jiang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000517:prevention & control*; D002245:Carbon Dioxide / Q000032:analysis*; D003080:Cold Temperature; D052918:Environmental Restoration and Remediation / Q000191:economics / Q000295:instrumentation / Q000379:methods*; D011210:Power Plants
chemical_list: D000393:Air Pollutants; D002245:Carbon Dioxide