CAJ | 학술논문

以浸渍法制备得到的 CeO2-Al2O3复合氧化物载体于500℃或700℃焙烧处理，浸渍 Co 和 Mo 物种后得到 Co-Mo/(CeO2-Al2O3)催化剂前驱体，再于500℃或700℃进行焙烧处理得到催化剂。采用 N2物理吸附、H2程序升温还原、X 射线衍射及扫描电子显微镜对催化剂进行了表征，在固定床上于550℃,3MPa,5000h-1，n(H2)/n(CO )为1.0且含有 H2S 的合成气中对催化剂的甲烷化性能进行了测试。结果表明 CeO2-Al2O3载体的焙烧温度对催化剂比表面积有较大影响，而催化剂表面 Co 与 Mo 物种的分散度主要受催化剂前驱体焙烧温度的影响。当 CeO2-Al2O3载体于500℃焙烧催化剂前驱体于700℃焙烧后，Co 与 Mo 物种的分散度最好，催化剂甲烷化活性最高。
이침지법제비득도적 CeO2-Al2O3복합양화물재체우500℃혹700℃배소처리，침지 Co 화 Mo 물충후득도 Co-Mo/(CeO2-Al2O3)최화제전구체，재우500℃혹700℃진행배소처리득도최화제。채용 N2물리흡부、H2정서승온환원、X 사선연사급소묘전자현미경대최화제진행료표정，재고정상상우550℃,3MPa,5000h-1，n(H2)/n(CO )위1.0차함유 H2S 적합성기중대최화제적갑완화성능진행료측시。결과표명 CeO2-Al2O3재체적배소온도대최화제비표면적유교대영향，이최화제표면 Co 여 Mo 물충적분산도주요수최화제전구체배소온도적영향。당 CeO2-Al2O3재체우500℃배소최화제전구체우700℃배소후，Co 여 Mo 물충적분산도최호，최화제갑완화활성최고。
CeO2-Al2O3 supports prepared by impregnation were calcinated at 500℃ or 700℃, then loaded with Co and Mo by impregnation, and the obtained Co-Mo/(CeO2-Al2O3) catalyst precursors were subjected to a second heat treatment at 500℃ or 700℃. The catalysts were characterized by N2 adsorption, H2-TPR, XRD and SEM, and their methanation performances were tested at 550℃, 3MPa, 5000h-1, and n (H2)/n (CO)=1.0 in the syngas containing H2S. The results indicated that the surface area of the catalyst was mainly affected by the calcination temperature of CeO2-Al2O3 support. While the dispersion of Co and Mo species were largely determined by the heat treatment temperature of catalyst precursor. The catalyst with the CeO2-Al2O3 support caicinated at 500℃ and the catalyst precursor treated at 700℃ showed the highest Co and Mo dispersion and the highest activity in methanation reaction.