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Received October 24, 2005
Accepted March 29, 2006
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메탄스팀개질반응용 촉매흡착제 개발에 관한 연구
Development of a Catalyst/Sorbent for Methane-Steam Reforming
한국에너지기술연구원 연료공정연구센터, 305-343 대전시 유성구 장동 71-2 1순천향대학교 나노화학공학과, 336-745 충남 아산시 신창면 읍내리 646
Fuel Process Research Center, Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon 305-343, Korea 1Department of Chemical Engineering, Soonchunhyang University, 646, Eupnae-ri, Shinchang-myun, Asan-si, Chungnam 336-745, Korea
chung@kier.re.kr
Korean Chemical Engineering Research, June 2006, 44(3), 307-313(7), NONE Epub 19 July 2006
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Abstract
본 연구에서는 석탄 등의 중질 탄소원으로부터 H2를 생산하는 시스템의 일부인 메탄스팀개질 공정에 사용되는 개질촉매와 CO2 흡착제를 하나로 결합시킨 촉매흡착제를 제조하여 H2 생산성 및 에너지 효율을 향상시키고자 하였다. 흡착제의 다공성과 표면적 증가를 위해서 1, 5, 10 wt％ 카본블랙을 흡착제 제조 시 사용하였으며, 압축강도와 마모강도를 증진시키기 위하여 5~10 wt％ Al2O3를 흡착제에 첨가하였다. SEM, TGA, BET, XRD, 마모측정기와 자체 제작한 흡탈착장치를 사용하여 제조된 흡착제의 열적, 물리적 특성들을 측정하였다. 측정결과, 5 wt％ Al2O3와 10 wt％ 카본블랙을 첨가한 흡착제가 7.61 kgf의 강도와 47％의 흡착능을 나타내어 가장 좋은 물성을 나타내었다. 제조된 흡착제에 메탄스팀개질반응에서 통상적으로 사용되는 Ni, Co, Fe를 10 wt％로 담지하여 촉매흡착제를 제조하였고 각 촉매흡착제에 대하여 메탄스팀개질반응을 수행한 결과, Ni/CaO 촉매흡착제의 반응효율이 가장 우수하였다. 결과적으로 본연구에서 개발한 촉매흡착제에 의한 메탄스팀개질 반응시스템이 700~750 °C의 온도에서 기존의 촉매와 흡착제가 분리된 시스템에 비해 5~10％ 높은 H2 생산성을 나타내었다.
In order to improve the efficiency of methane steam reforming process, a part of the system which produces hydrogen from heavy hydrocarbon resources such as coal, we combined metal catalyst with CaO sorbent and fabricated catalyst/sorbent. To increase the porosity and the compressive strength of sorbent, carbon black and α-alumina were mixed with CaO powder during preparation. The effects of sorbent composition on the physical properties were investigated by SEM, TGA, BET, XRD, abrasion strength measuring device and adsorption-desorption instrument. Sorbent with 5 wt％ Al2O3 and 10 wt％ carbon black showed the best physical features with 7.61 kgf strength and 47％ CO2 adsorption capability. Various metal catalysts such as Ni, Co and Fe were supported on the sorbent developed and 10 wt％ Ni/sorbent was selected for methane steam reforming process based on the result of reaction experiment. The reaction system using the catalyst/sorbent showed better H2 productivity compared to the detached system with catalyst and sorbent, indicating the effectiveness of the system developed in this study.
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Avci AK, Trimm DL, Onsan ZI, Chem. Eng. Sci., 56(2), 641 (2001)
Asami K, Li XH, Fujimoto K, Koyama Y, Sakurama A, Kometani N, Yonezawa Y, Catal. Today, 84(1-2), 27 (2003)
Akande AJ, Idem RO, Dalai AK, Appl. Catal. A: Gen., 287(2), 159 (2005)
Galvita V, Sundmacher K, Appl. Catal. A: Gen., 289(2), 121 (2005)
Salvador C, Lu D, Anthony EJ, Abanades JC, Chem. Eng. J., 96(1-3), 187 (2003)
Dias JAC, Assaf JM, Catal. Today, 85(1), 59 (2003)
Lemonidou AA, Vasalos IA, Appl. Catal. A: Gen., 228(1-2), 227 (2002)
Quincoces CE, Dicundo S, Alvarez AM, Gonzalez MG, Mater. Lett., 50(1), 21 (2001)
Salvador C, Lu D, Anthony EJ, Abanades JC, Chem. Eng. J., 96(1-3), 187 (2003)
Kimura S, Adachi M, Noda R, Horio M, Chem. Eng. Sci., 60(14), 4061 (2005)
