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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CuOCeO2/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。
Three CuO-CeO2 supported catalysts were prepared by co-impregnation method using activated alumina particles (GAA), 13X molecular sieves (13XMS) and 4A molecular sieves (4AAMS) as carriers. And other means to characterize the catalyst, and evaluate the catalytic activity of naphthalene on a fixed bed catalytic reaction device. The results show that the support has a great influence on the performance of CuO-CeO2 catalyst, the catalytic ability of CuO-CeO2 / 4AMS for naphthalene is poor, while the CuOCeO2 / GAA and CuO-CeO2 / 13XMS have good naphthalene catalytic ability; The catalytic activity of CuO-CeO2 / GAA and CuO-CeO2 / 13XMS increased significantly with the increase of temperature. The yield of naphthalene was 85% and 81% at 350 ℃ and the removal rate of CuO- CeO2 / 13XMS has better low temperature activity than CuO-CeO2 / GAA, and the yield of CO2 is nearly 70% at 250 ℃. The removal rates of CuO-CeO2 / 13XMS and CuO-CeO2 / Above, the reaction stability is better.