| Issue |
Korean Chemical Engineering Research,
Vol.44, No.4, 363-368, 2006
Vol.44, No.4, 363-368, 2006
구리 촉매 상에서 C9-알데히드의 수소화 반응에 의한 C9-알코올 합성
Synthesis of C9-Alcohol through C9-Aldehyde Hydrogenation over Copper Catalysts
C9-알데히드를 수소화하여 C9-알콜을 제조하는 공정에 사용하기 위한 최적의 촉매를 선정하고, C9-알콜의 수율을 극대화하기 위한 운전 조건을 확립하기 위한 실험을 수행하였다. 구리 전구체로 acetate를 사용하고 침전제로 Na2CO3를 사용하여 제조한 CuO/ZnO/Al2O3(60:30:10 wt％) 촉매의 표면적 및 구리 비표면적이 가장 우수하였으며 C9-알데히드 수소화 반응에서도 가장 우수한 성능을 보였다. 최적화된 촉매를 장착한 trickle bed 반응기를 사용하여 175 °C, 800 psi, WHSV=3 hr.1의 조건에서 94.1 wt％의 C9-알콜 수율을 얻었다. 알데히드의 수소화 반응에 사용되는 다른 촉매들과 비교한 결과 Ni/kieselghur 촉매와 유사한 성능을 보였으며 Cu-Ni-Cr-Na/Al2O3 촉매 및 Ni-Mo/Al2O3 촉매의 경우보다 우수한 성능을 보이는 것을 확인하였다. 장기 촉매 테스트를 통해서 촉매의 안정성을 확인한 결과 약 72시간 이후에는 고비점 부산물의 생성량 증가로 인하여 C9-알콜의 수율이 약간씩 감소하였다.
This study selected the optimal catalyst for the process of producing C9-alcohol by hydrogenating C9-aldehyde, and carried out an experiment in order to establish the operating condition for maximizing the yield of C9-alcohol. The BET surface area and the specific area of copper were most excellent in CuO/ZnO/Al2O3 (60:30:10 wt％) catalyst produced using acetate as a precursor of copper and Na2CO3 as a precipitant, and the catalyst also showed the highest performance in C9-aldehyde hydrogenation. Using a trickle bed reactor loaded with optimized catalyst, we attained 94.1 wt％ yield of C9-alcohol under the condition of 175 °C, 800 psi and WHSV=3 hr.1. According to the result of comparing with other catalysts used in the hydrogenation of aldehyde, the catalyst showed similar performance to that of Ni/kieselghur and higher than that of Cu-Ni-Cr-Na/Al2O3 and Ni-Mo/Al2O3. According to the result of examining the stability of the catalyst through a long-term catalysis test, the yield of C9-alcohol decreased slowly after around 72 hours due to the increasing production of high boiling-point byproducts.
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