DOI QR코드

DOI QR Code

고전압 임펄스 공정의 전계와 접촉시간이 Ca2+ 농도 저감에 미치는 영향의 속도론 연구

Kinetic study about the effect of electric field and contact time of high voltage impulse on reduction of Ca2+ concentration

  • 김담하 (호서대학교 환경공학과) ;
  • 장인성 (호서대학교 환경공학과)
  • Kim, Dam-Ha (Department of Environmental Engineering, Hoseo University) ;
  • Chang, In-Soung (Department of Environmental Engineering, Hoseo University)
  • 투고 : 2020.12.31
  • 심사 : 2021.02.01
  • 발행 : 2021.04.15

초록

High voltage impulse (HVI) has been gained attention as an alternative technique that could control the CaCO3 scale problems encountered in water main, pipe, cooling tower and heat exchanger vessels. The aim of this study was to investigate the effect of electric field (E) and contact time (t) of HVI on reduction of Ca2+ concentration at two different temperatures of 25℃ and 60℃. A kinetic model on the effect of E and t was investigated too. As the E and t increased, the Ca2+ concentration decreased more than that of the control (= no HVI). The Ca2+ concentration decreased up to 81% at 15 kV/cm at 60℃, which was nearly 2 times greater than the control. With these experimental data-set of reduction of Ca2+ concentration under different E and t, the kinetic model was developed. The relationship between E and t required to reduce the concentration of Ca2+ by 30% was modeled at each temperature. The empirical model equations were; E0.83· t = 60.3 at 25℃ and E0.08· t = 1.1 at 60℃. These equations state the products of En and t is always constant, which means that the required contact time can be reduced in accordance with the increment of E and vice versa.

키워드

과제정보

본 연구는 한국연구재단의 연구비 지원으로 수행되었습니다. 이에 감사드립니다. (과제번호: 2019R1F1A1042061).

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