CAJ | 학술논문

以活性氧化铝颗粒(GAA)、13X 分子筛(13XMS)和4A分子筛(4AMS)为载体，通过共浸渍法制备3种CuO-CeO2负载型催化剂，利用氮吸附?脱附、扫描电镜、X射线衍射等手段对催化剂进行表征，并在固定床催化反应装置上评价萘的催化活性。结果表明，载体对CuO-CeO2催化剂的性能影响很大，CuO-CeO2/4AMS对萘的催化能力较差，而CuO- CeO2/GAA和CuO-CeO2/13XMS则具有良好的萘催化能力；随着催化反应温度升高， CuO-CeO2/GAA 和 CuO-CeO2/13XMS的催化能力显著提升，350℃时2种催化剂对萘的CO2产率分别为85%和81%，去除率均超过98%，CuO-CeO2/13XMS具有比CuO-CeO2/GAA更好的低温活性，250℃时CO2产率接近70%；CuO-CeO2/13XMS 和 CuO-CeO2/GAA经过5次循环实验后去除率均保持在92%以上，反应稳定性较好。
이활성양화려과립(GAA)、13X 분자사(13XMS)화4A분자사(4AMS)위재체，통과공침지법제비3충CuO-CeO2부재형최화제，이용담흡부?탈부、소묘전경、X사선연사등수단대최화제진행표정，병재고정상최화반응장치상평개내적최화활성。결과표명，재체대CuO-CeO2최화제적성능영향흔대，CuO-CeO2/4AMS대내적최화능력교차，이CuO- CeO2/GAA화CuO-CeO2/13XMS칙구유량호적내최화능력；수착최화반응온도승고， CuO-CeO2/GAA 화 CuO-CeO2/13XMS적최화능력현저제승，350℃시2충최화제대내적CO2산솔분별위85%화81%，거제솔균초과98%，CuO-CeO2/13XMS구유비CuO-CeO2/GAA경호적저온활성，250℃시CO2산솔접근70%；CuO-CeO2/13XMS 화 CuO-CeO2/GAA경과5차순배실험후거제솔균보지재92%이상，반응은정성교호。
ABSTRACT:Three kinds of CuO-CeO2catalysts supported on granular activated alumina (GAA), 13X molecular sieve (13XMS) and 4A molecular sieve (4AMS) were prepared by the co-impregnation method. The physical and chemical properties of the catalysts were characterized by N2 adsorption-desorption and scanning electron microscopy as well as X-ray diffraction, and their catalytic activities of naphthalene (Nap) oxidation were evaluated using a fixed-bed reactor. The results indicate that the carriers have strong influences on the catalytic activities of the CuO-CeO2 catalysts for Nap. CuO-CeO2/4AMScatalyst shows a poor catalytic activity for Nap. Whereas CuO-CeO2/GAA and CuO-CeO2/ 13XMS exhibit a higher catalytic activity, and they are both significantly improved at elevating reaction temperatures. The CO2 yields of Nap over CuO-CeO2/GAA and CuO-CeO2/ 13XMS 85% and 81% separately, and their removal efficiencies are both exceed 98% at 350℃ . Moreover,CuO- CeO2/13XMS shows a better catalytic activity for Nap than CuO-CeO2/GAA at low temperature, whose CO2 yield is up to 70% at 250℃ . In addition, CuO-CeO2/13XMS and CuO- CeO2/GAA still have excellent catalytic activities for Nap and their catalytic efficiencies are more than 92% after 5 cycles,which indicates that two catalysts both have a high reaction stability.