258776 Examination of Solvent Recovery by Pressure Swing Adsorption (PSA) Method-Influence of Coexistence Humidity-

Tuesday, October 30, 2012
Hall B (Convention Center )
Kazuyuki Chihara1, Jun Kobayashi2, Takuya Chiyoda3 and Kouki Aoshima2, (1)Applied Chemistry, Meiji University, Kawasaki, Japan, (2)Science and Engineering, Meiji University, Kawasaki, Japan, (3)Meiji University, Applied Chemistry, Kawasaki, Japan

Examination of Solvent Recovery by pressure swing adsorption (PSA) methodInfluence of coexistence humidity

Kazuyuki Chihara1*, 〇Jun Kobayashi1,Kouki Aoshima1,Takuya Chiyoda 1,

1) Meiji University, Japan

1-1-1 Higashi-mita, Tama-ku, Kawasaki 214-8571, Japan

Corresponding author, FAX +81-44-934-7197, E-mail: chihara@isc.meiji.ac.jp

An organic solvent exhausted by the factory negatively affects the human body and the environment. The recovery and the removal are indispensable operations in a chemical industrial process. Water vapor obstructs the adsorption of an adsorbate and results in gradual deterioration of an absorbent. It is necessary to examine how water vapor affects the organic solvent recovery. As a method of removing the organic solvent, adsorption in the chemical engineering field is used. There is pressure swing adsorption (PSA) method using the technique; An operation pressure is alternately changed with the high pressure and the low pressure. It is a method using the difference of the amount of adsorption. In the present study, water vapor content in the mixed gas was changed and the behavior of the density of the solvent in the product gas was examined with Stripping reflux PSA unit. CH2Cl2 and water vapor were chosen as an adsorbate. Silica gel (CARiACT Q-6) was chosen as an adsorbent. The recovery experiment of the organic solvent was conducted by PSA method. As a result, the density of the solvent in product gas increased when the ratio of water vapor increased . It is clear that water vapor influences the adsorption of CH2Cl2.

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