摘要本文采用并流共沉淀法合成一系列水滑石类化合物，用于制备负载型氨合成钌催化剂的复合氧化物载体。其中，由镁铝水滑石制备的镁铝复合氧化物载体性能最好，以之为载体、KNO3为助剂的钌催化剂在0.2MPa下的氨合成活性高达40mLNH3·h-1·g-1，且具有良好的耐热性能，经500℃以上高温热处理25h，共计使用约120h后仍保持较高的催化活性。镁铝复合氧化物载体的性能与制备条件的选择密切相关。相对铵碱液而言，钠碱液为沉淀剂能够制备出更优良的载体，其载体微观形貌为杂乱的六边形片层堆积结构，对钌晶粒的烧结有一定的抑制作用，使催化剂具有高而稳定的活性。钠碱液沉淀剂的用量和滴料终点的pH值对复合氧化物的...Abstract Novel complex oxides were prepared as the supports of ruthenium-based catalysts for ammonia synthesis by calcinating a series of hydrotalcite-type compounds that were obtained from co-precipitation. Of all the synthesized supports, magnesium-aluminum complex oxide Mg(Al)O showed extraordinary performance. The catalyst Ru/Mg(Al)O promoted with KNO3 exhibited significantly high ...学位：工程硕士院系专业：化学化工学院化学工程系_工业催化学号：20023301
