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OALib Journal期刊
ISSN: 2333-9721
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还原条件对pd/al2o3催化剂上对硝基苯酚加氢性能的影响
DOI: doi:10.3969/j.issn.1671-7627.2012.02.014, PP. 63-66
Keywords: pd,al2o3,对硝基苯酚,浸渍,液相还原
Abstract:
摘要：用过量浸渍液相还原法制备pd/al2o3催化剂，采用等离子发射光谱仪（icp）、x线衍射仪(xrd)对催化剂进行表征，并在对硝基苯酚催化加氢反应中考察其催化性能。结果表明：还原剂的类型、还原温度和还原时间对pd/al2o3催化剂的晶型和活性影响显著。当采用水合肼（n2h4·h2o）作还原剂、0℃还原30min时，催化剂表现出较高的对硝基苯酚加氢活性，加氢速率达到22.7mmol/(min·g)，对氨基苯酚的选择性为100%，收率为99%。与工业常用骨架ni催化剂的性能进行比较，pd/al2o3催化剂在活性、选择性和稳定性都明显优于骨架ni催化剂。
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