Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Crystallization Kinetics of NTO in a Batch Cooling Crystallizer

회분식 냉각 결정화기에서 NTO의 결정화 메카니즘

  • Kim, K.J. (Chemical Process and Engineering Center, Korea Research Institute of Chemical Technology) ;
  • Kim, M.J. (Chemical Process and Engineering Center, Korea Research Institute of Chemical Technology) ;
  • Yeom, C.K. (Chemical Process and Engineering Center, Korea Research Institute of Chemical Technology) ;
  • Lee, J.M. (Chemical Process and Engineering Center, Korea Research Institute of Chemical Technology) ;
  • Choi, H.S. (Department of Chemical Engineering, Chungnam National University) ;
  • Kim, H.S. (1-3-5, Agency of Defense Development) ;
  • Park, B.S. (1-3-5, Agency of Defense Development)
  • 김광주 (한국화학연구소 화학공정 연구센터) ;
  • 김민준 (한국화학연구소 화학공정 연구센터) ;
  • 염충균 (한국화학연구소 화학공정 연구센터) ;
  • 이정민 (한국화학연구소 화학공정 연구센터) ;
  • 최호석 (충남대학교 화학공학과) ;
  • 김현수 (국방과학연구소 1-3-5 연구실) ;
  • 박방삼 (국방과학연구소 1-3-5 연구실)
  • Received : 1998.04.16
  • Accepted : 1998.09.17
  • Published : 1998.12.10
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Abstract

The kinetics of crystal growth and nucleation in dependence on the supersaturation of an aqueous solution of 3-nitro-1,2,4-triazol-5-one(NTO) were evaluated on the draft tube-baffle(DTB) crystallizer operated batchwise. The crystal growth rate is proportional to the supersaturation to the 2.9 power, and the nucleation rate to the 4.2 power. The uncleation behavior for NTO-water system in DTB crystallizer was grasped according to Mersmann's criteria. The nucleation in this crystallizer was found to act with heterogeneous nucleation and surface uncleation simultaneously. Simplified relation was derived for calculation of mean crystal size of product crystals from the batch cooling crystallizer. The obtained relation was verified by a set of experiments.

회분식 통풍관형(DTB) 냉각 결정화기에서 3-nitro-1,2,4,-triazol-5-one(NTO)의 결정화 메카니즘에 관한 연구가 수행되었다. 결정성장속도 및 핵생성속도에 대한 과포화 의존성이 조사되었다. 핵생성 메카니즘 판별을 위한 Mersmann 이론을 이용하여 NTO의 핵생성 거동에 대한 메카니즘이 파악되었다. DTB 결정화기에서 NTO의 핵생성 거동은 불균일핵생성과 표면핵생성이 동시에 기여함을 알 수 있었다. 핵생성속도는 과포화에 4.2승에 비례하였고 결정성장속도는 과포화의 2.9승에 비례하였다. 회분식 DTB 냉각 결정화에서 얻은 NTO 결정의 크기는 결정화 메카니즘으로부터 얻어진 상관식으로부터 검증되었다.

Keywords

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