Pd@NHPC的合成及苯酚液相加氢性能研究任务书
2020-04-24 11:17:51
1. 毕业设计(论文)的内容和要求
环己酮是生产尼龙6和尼龙66的重要有机中间体,广泛应用于农药、染料、涂料等领域。一步法苯酚液相加氢制环己酮工艺由于其环境友好、节约能源等优点而受到广泛关注。催化剂的设计与制备是实现此工艺高效化的关键之一。目前应用于此工艺的催化剂多为负载型,研究围绕催化剂的活性组分、载体、助剂等展开,其中载体对于活性组分的分散性、反应物的吸附以及产物的分离有显著的影响。课题组前期研究发现采用以活性炭为载体的Pd催化剂催化苯酚液相加氢制环己酮反应过程中,有机物易吸附于催化剂孔道中,从而造成催化剂失活的现象。多级孔碳材料(hierarchically porous carbon,HPC)孔隙率高、具有可调控的孔结构,采用其作为催化剂载体用于苯酚液相加氢制环己酮过程中,有望提高催化剂的催化性能。
本课题采用氧气对活性炭进行活化,以制造更多的介孔、大孔,从而获得HPC载体;在此基础上以双氰胺为氮源,通过煅烧制备N掺杂的NHPC,并采用浸渍法负载活性组分Pd制Pd@NHPC催化剂,考察氧含量、煅烧温度等变量对HPC载体结构及Pd@NHPC催化加氢性能的影响。采用SEM、XRD、BET、XPS等技术对催化剂微结构进行详细表征,并用于苯酚液相加氢制环己酮反应中测试其反应性能。
2. 参考文献
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3. 毕业设计(论文)进程安排
2018.12.22~2019.1.18 查阅文献,翻译英文文章,撰写开题报告;
2019.1.18~2019.3.20 熟悉实验流程;
2019.3.21~2019.5.20 实验研究,总结规律,处理实验数据;
2019.5.21~2019.6.7 撰写毕业论文。