화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.23, No.4, 429-434, December, 2017
DOI10.7464/ksct.2017.23.4.429  Export Citation
Mg 첨가에 따른 수성가스전이반응용 Cu/ZnO/Al2O3 촉매의 활성 연구
Enhanced Catalytic Activity of Cu/ZnO/Al2O3 Catalyst by Mg Addition for Water Gas Shift Reaction
박지혜1, 백정훈1, 2, 황라현1, 이광복3, †
  • 1충남대학교 에너지과학기술대학원, 34134 대전광역시 유성구 대학로99
  • 2한국에너지기술연구원 분리변환소재연구실, 34129 대전광역시 유성구 가정로 152
  • 3충남대학교 화학공학교육과, 34134 대전광역시 유성구 대학로99
Ji Hye Park1, Jeong Hun Baek1, 2, Ra Hyun Hwang1, and Kwang Bok Yi3, †
  • 1Graduate School of Energy Science and Technology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, South Korea
  • 2Separation and Conversion Materials Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, South Korea
  • 3Department of Chemical Engineering Education, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, South Korea
E-mail:
초록
저온 수성가스전이반응에서 Cu/ZnO/MgO/Al2O3 (CZMA) 촉매의 마그네슘의 영향을 조사하기 위하여 Cu/Zn/Mg/Al의 비율을 45/45/5/5 mol%로 공침법을 사용하여 제조하였다. 제조된 촉매들은 BET, N2O 화학흡착, XRD, H2-TPR and NH3-TPD를 사용하여 분석되었다. 촉매 활성 테스트는 GHSV 28,000 h-1와 온도 범위 200 ~ 320 ℃에서 수행되었다. 동일한 조건에서 마그네슘이 첨가된 촉매(CZMA 400)는 가장 낮은 환원 온도를 나타내며 활성종인 Cu+가 안정적으로 존재하고 또한 많은 약산점을 보유하였다. 또한 마그네슘이 첨가된 촉매(CZMA)는 마그네슘이 첨가되지 않은 촉매(CZA)와 비교하였을 때 240 이상의 높은 온도에서 촉매 활성이 증가하였다. CZMA 400 촉매는 최적의 촉매로서 240 ℃, GHSV 28,000 h-1에서 75 h 동안 활성의 저하없이 평균 CO 전환율 77.59%를 나타내었다.
To investigate the effect of magnesium oxide addition, Cu/ZnO/MgO/Al2O3 (CZMA) catalysts were prepared using co-precipitation method with fixed molar ratio of Cu/Zn/Mg/Al as 45/45/5/5 mol% for low-temperature water gas shift reaction. Synthesized catalysts were characterized by using BET, N2O chemisorption, XRD, H2-TPR and NH3-TPD analysis. The catalytic activity tests were carried out at a GHSV of 28,000 h-1 and a temperature range of 200 ~ 320 ℃. At the same condition, magnesium oxide added catalyst (CZMA 400) showed that the lowest reduction temperature and stable presence of Cu+, that is active species and abundant weak acid site. Also magnesium oxide added catalysts (CZMA) showed higher catalytic activity at temperature range above 240 ℃ than the catalyst without magnesium oxide (CZA). Consequently, CZMA 400 catalyst is considered to be excellent catalyst showing CO conversion of 77.59% without deactivation for about 75 hours at 240 ℃, GHSV 28,000 h-1.
Keywords:Water Gas Shift (WGS);Cu/ZnO/MgO/Al2O3;Magnesium;Co-precipitation;Catalytic activity
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