Reduction of Electric Power Consumption in CO 2 -PSA with Zeolite 13X Adsorbent

Nobuyuki Shigaki, Yasuhiro Mogi, Takashi Haraoka and Ikuhiro Sumi
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Nobuyuki Shigaki: Steel Research Laboratory, JFE Steel Corporation, 1 Kokan-cho, Fukuyama, Hiroshima 721-8510, Japan
Yasuhiro Mogi: Steel Research Laboratory, JFE Steel Corporation, 1 Kokan-cho, Fukuyama, Hiroshima 721-8510, Japan
Takashi Haraoka: Steel Research Laboratory, JFE Steel Corporation, 1 Kokan-cho, Fukuyama, Hiroshima 721-8510, Japan
Ikuhiro Sumi: Steel Research Laboratory, JFE Steel Corporation, 1 Kokan-cho, Fukuyama, Hiroshima 721-8510, Japan

Energies, 2018, vol. 11, issue 4, 1-21

Abstract: Reduction of CO 2 from waste gases from various industries is now desired worldwide. As a technology for separating CO 2 from mixed gases, Pressure Swing Adsorption (PSA) is one of the practical processes that are widely used at present owing to the simplicity of its gas separation mechanism. In order to reduce the cost of CO 2 separation, a further reduction of the running cost of CO 2 -PSA operation is required. Among all the utilities used in CO 2 -PSA, electric power consumption has the greatest impact, especially in cases where the pressure swing range between gas adsorption and gas desorption is large. Electric power consumption increases significantly when the pressure loss inside the adsorber has reached a non-negligible level. Changing the adsorbent pellet size is a convenient method for reducing pressure loss, but its effect on CO 2 -PSA performance was unclear. Therefore, in this work, the effects of the size of the adsorbent pellets on both the gas adsorption behavior and the electric power consumption in CO 2 -PSA were evaluated experimentally. From the results of laboratory-scale CO 2 -PSA experiments and gas adsorption rate measurements, it was observed that the effect of the pellet size appeared only in the early stage of the gas adsorption step and was not dominant when the cycle time was sufficiently long. Subsequently, pilot-scale CO 2 -PSA experiments with the same CO 2 throughput were also conducted, and as a result, the electric power consumption of a vacuum pump was lowered by 15% in case of using d = 3.0 mm larger adsorbent pellets compared to the results with d = 1.5 mm smaller adsorbent pellets.

Keywords: CO 2; carbon dioxide; Pressure Swing Adsorption (PSA); Vacuum Swing Adsorption (VSA); pressure swing adsorption; 13X; zeolite (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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