Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Synthesis of Butenes through Butanol Dehydration over Catalyst Prepared from Water Treatment Sludge

정수 슬러지로부터 제조된 촉매 상에서 부탄올 탈수반응을 통한 부텐 제조

  • Kim, Goun (Department of Chemical Engineering, Kongju National University) ;
  • Bae, Junghyun (Department of Chemical Engineering, Kongju National University) ;
  • Choi, Hyeonhee (Department of Chemical Engineering, Kongju National University) ;
  • Lee, Choul-Ho (Department of Chemical Engineering, Kongju National University) ;
  • Jeon, Jong-Ki (Department of Chemical Engineering, Kongju National University)
  • Received : 2014.10.27
  • Accepted : 2014.12.09
  • Published : 2015.02.01
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Abstract

The objective of this study is to evaluate the catalytic potential of the porous material prepared from water treatment sludge. The textural properties of the catalyst were studied using $N_2$ adsorption and desorption isotherms, scanning electron microscope, and X-ray diffraction. The pellet-type catalyst prepared using water treatment sludge is determined to be a material that contains mesopores as well as micropores. The specific surface area of the catalyst is $157m^2/g$. Acidic characteristics of the catalyst are analyzed by temperature-programmed desorption of ammonia and infrared spectroscopy of adsorbed pyridine. 2-Butanol dehydration reaction was carried out in a fixed bed catalytic reactor. Yields of 1-butene, trans-2-butene, and cis-2-butene at $350^{\circ}C$ were 25.6 wt%, 19.2 wt%, and 29.9 wt%, respectively. This catalytic activity of the catalyst based on water treatment sludge in 2-butanol dehydration is due to the acid sites composed of Bronsted acid sites and Lewis acid sites. It was confirmed that the catalyst based on water treatment sludge can be utilized to produce $C_4$ olefin through butanol dehydration.

본 연구의 목적은 정수 슬러지로부터 제조된 다공성 물질의 촉매 기능을 평가하기 위한 것이다. 촉매의 구조적 특성은 질소 흡착-탈착 등온선, 주사 전자 현미경 및 X선 회절을 이용하여 조사하였다. 정수 슬러지로부터 제조된 촉매는 메조 기공과 미세 기공을 동시에 보유하고 있으며, 촉매의 비표면적은 $157m^2/g$이다. 촉매의 산특성은 암모니아 승온탈착법과 피리딘 흡착 적외선 분광법으로 분석하였다. 고정층 촉매 반응기에서 2-부탄올의 탈수 반응을 수행한 결과, $350^{\circ}C$의 반응 온도에서 1-부텐, 트랜스-2-부텐 및 시스-2-부텐의 수율은 각각 25.6 wt%, 19.2 wt% 및 29.9 wt%이었다. 정수 슬러지로부터 제조된 촉매의 2-부탄올 탈수 반응 활성은 브뢴스테드 산점와 루이스 산점으로 이루어진 산점을 보유한 것에 기인한다. 부탄올의 탈수 반응에 의해 $C_4$ 올레핀을 제조하는 반응에서 정수 슬러지로부터 제조된 촉매의 활용 가능성을 확인하였다.

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