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The Membrane Society of Korea (한국막학회)
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Assessing the Dehydration Pervaporation Performance for Purification of Industrially Significant 1, 2 Hexanediol/Water Mixtures Using Crosslinked PVA Membrane

가교된 PVA 분리막을 이용한 1, 2 hexanediol/water 혼합물의 투과증발 탈수 특성 연구

  • Shivshankar Chaudhari (Department of Industrial Chemistry, Pukyong National University) ;
  • Se Wook Jo (Department of Industrial Chemistry, Pukyong National University) ;
  • Min Young Shon (Department of Industrial Chemistry, Pukyong National University)
  • 시브샹카 샤우드하리 (국립부경대학교 공업화학.고분자공학부 공업화학전공) ;
  • 조세욱 (국립부경대학교 공업화학.고분자공학부 공업화학전공) ;
  • 손민영 (국립부경대학교 공업화학.고분자공학부 공업화학전공)
  • Received : 2023.11.30
  • Accepted : 2023.12.07
  • Published : 2023.12.31
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Abstract

In this study, the alternative to the energy-intensive conventional vacuum distillation process, an eco-friendly and energy-efficient pervaporation separation was employed in 1,2 hexane diol/water (HDO/water) mixture. The crosslinked PVA-glutaraldehyde was coated inside the alumina hollow fiber membrane (Al-HF). In the HDO/IPA pervaporation separation, optimization of the membrane concerning PVA/GA ratio, curing temperature, and pervaporation operating condition were performed. In the long-term stability test, the sustainable pervaporation separation performance giving flux in the range of 1.90~2.16 kg/m2h, and water content in permeate was higher than 99.5% (separation factor = 68) was obtained from the PVA/GA (molar ratio = 0.08, curing temperature = 80℃) coated Al-HF membrane from HDO/water (25/75, w/w, %) mixture at 40℃. Therefore, this work provides potential and inspiration for PVA-based membranes to mitigate excessive energy requirements in HDO/water separation by pervaporation.

본 연구에서는 에너지 소모가 큰 기존 진공 증류 공정의 대안으로 친환경이면서 에너지 효율적인 투과증발 분리공정을 이용하여 1,2 hexane diol/water (1,2 HDO/water) 혼합물에서 물을 분리하는 데 적용되었다. 사용한 분리막은 glutaraldehyde (GA)로 가교된 PVA를 알루미나 중공사 막(Al-HF) 내부에 코팅하여 사용하였다. 1,2 HDO/water 투과증발 분리공정에서는 PVA/GA 비율, 경화 온도 및 투과증발 분리공정 운전 조건에 대한 막의 최적화를 연구하였다. 장기 안정성 시험에서 PVA/GA (몰 비율 = 0.08, 경화 온도 = 80℃) 로 코팅된 Al-HF 막이 공정온도 40℃에서 1.90~2.16 kg/m2h 범위의 투과도를 보였으며, 투과용액의 수분 함량은 99.5% (separation factor = 68) 이상이었다.

Keywords

Acknowledgement

This work was financially funded by a Research Grant of Pukyong National University (2022).

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