Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Effects of Promoter on the Formation of Gas Hydrate from Blast Furnace Gas

철강공정 배기가스로부터 가스 하이드레이트 형성에 미치는 촉진제의 영향

  • Kwak, Gye-Hoon (Department of Chemical Engineering, Pohang University of Science & Technology) ;
  • Sa, Jeong-Hoon (Department of Chemical Engineering, Pohang University of Science & Technology) ;
  • Kim, Si-Hwan (CO2 Project Team, Research Institute of Industrial Science & Technology) ;
  • Lee, Bo Ram (Chemical and Biological Engineering Department, Colorado School of Mines) ;
  • Lee, Kun-Hong (Department of Chemical Engineering, Pohang University of Science & Technology)
  • Received : 2014.05.30
  • Accepted : 2014.08.24
  • Published : 2015.02.01
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Abstract

In this work, the performance of various promoters was investigated used in $CO_2$ separation from the gases emitted from steel-making process using gas hydrate technology. The studied promoters are tetrahydrofuran (THF), propylene oxide and 1,4-dioxane, which are all expected to form a structure II hydrate, and the target gases include $CO_2/N_2$ mixed gases ($CO_2/N_2$ = 20/80 and 40/60) and Blast Furnace Gas (BFG). The phase equilibrium points were measured when each promoter was added with various concentrations. For fast acquisition of abundant data, the "continuous" Quartz crystal microbalance (QCM) method was employed. In addition, the crystal structure of each gas hydrate was analyzed by Powder X-ray diffraction (PXRD).

본 연구에서는 가스 하이드레이트 기술을 이용하여 철강 공정 배기가스로부터 $CO_2$를 분리하는데 사용하는 여러 촉진제의 성능을 조사하였다. 이 실험에서는 $CO_2/N_2$ 혼합가스 ($CO_2/N_2$=20/80, 40/60)와 $CO_2/N_2$ 이외에 CO, $H_2$가 첨가된 Blast furnace gas (BFG) 모델 가스를 대상 가스로 사용하였다. 촉진제로는 구조 II 하이드레이트를 형성한다고 알려진 tetrahydrofuran (THF), propylene oxide, 1,4-dioxane 를 사용하였으며, 각 가스에 대하여 촉진제를 농도별로 첨가했을 때 상평형점의 변화를 측정하였다. 상평형점은 "연속" Quartz crystal microbalance (QCM) 방식을 이용하였다. 또한, Powder X-ray diffraction (PXRD) 분석을 통하여 촉진제의 첨가가 가스 하이드레이트 구조에 미치는 영향을 알아보았다.

Keywords

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