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구리계 탈황제의 환원 및 황화 반응 특성 조사

Investigation of Reduction and Sulfurization Reactions for CuO-based Sorbents

강민필 이효송 이태진¹ 이영우^†

Min-Pil Kang Hyo-Song Lee Tae-Jin Lee¹ Young-Woo Rhee^†

충남대학교 화학공학과, 대전 305-764 ¹영남대학교 응용화학부, 경산 712-749

Department of Chemical Engineering, Chungnam National University, Daejeon 305-764, Korea ¹School of Chemical Engineering and Technology, Yeungnam University, Gyongsan 712-749, Korea

HWAHAK KONGHAK, August 2002, 40(4), 492-497(6), NONE

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Abstract

본 연구에서는 구리계 탈황제에 대한 환원 및 황화 반응 특성을 연구하기 위하여 CS 탈황제, CMS 탈황제 그리고 CFS 탈황제를 제조하였다. CS 탈황제는 주반응물질인 CuO와 지지체인 SiO2의 함량을 변화시키면서 제조하였고 CMS 탈황제는 지지체 SiO2를 25 wt%로 고정하고 MoO3와 CuO의 함량을 변화시키면서 제조하였다. CFS 탈황제는 CMS 탈황제와 같은 비율로 주반응 물질인 CuO와 첨가제 Fe2O3의 함량을 변화시키면서 제조하였다. 탈황제는 제조 과정이 단순하고 경제적인 단순혼합법을 이용하여 제조하였다. 제조된 탈황제의 반응성을 조사하기 위하여 TGA 실험을 실시하였으며 Chatterjee-Conrad법을 사용하여 환원 및 황화 반응시의 활성화 에너지를 계산하였다. 그 결과 CS 탈황제의 경우 환원 반응에서는 지지체인 SiO2의 함량이 감소할수록 활성화 에너지가 증가하였고, 황화 반응에서는 SiO2의 함량이 감소할수록 활성화 에너지가 감소하였다. 환원 및 황화반응의 활성화 에너지 측면에서 첨가제를 함유하지 않은 탈황제가 첨가제를 함유한 탈황제보다 우수한 성능을 보였다. MoO3를 첨가제로 사용하는 것보다 Fe2O3를 첨가제로 사용하는 것이 활성화 에너지 측면에서 보다 유리한 것으로 나타났다.

In this study, CuO-based sorbents were prepared to investigate their characteristics of the reduction and sulfurization reactions. CS sorbents were prepared with various contents of CuO and SiO2. CMS sorbents were prepared with 25 wt% SiO2 and various contents of CuO and MoO3. CFS sorbents were composed of 25 wt% SiO2 and various contents of CuO and Fe2O3. All sorbents were prepared using the simple mixing method which was known to be economical and easy to apply. In order to investigate reactivities of the prepared sorbents in the reduction and sulfurization reactions, TGA experiments were performed, and the activation energies of the reactions were calculated based on the Chatterjee-Conrad method. Experimental results showed that the activation energy increased as the contents of SiO2 decreased for the reduction reaction._x000D_ The activation energy decreased as the contents of SiO2 decreased for the sulfurization reaction. The sorbents without additives gave better performances than the sorbents containing additives in terms of the activation energy for the reduction and the sulfurization reactions. CFS sorbents showed more favorable activation energy than CMS sorbents.

Keywords

CuO-Based Sorbent Additives Reduction Reaction Sulfurization Reaction Activation Energy

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