详解【精品】应用于笑气分解的整体式催化剂的研究毕业设计.docVIP

(此文档为word格式，下载后您可任意编辑修改！) 应用于笑气分解的整体式催化剂的研究 中文摘要：本文首先基于Beta、MCM-49、ZSM-5、FER、MOR等五种不同构型沸石分子筛，应用液相离子交换法对其进行改性，制备出了Fe、Co两种金属离子改性的沸石分子筛。接着以堇青石为载体，通过一步涂覆法和两步涂覆法制备了Beta等一系列的整体式沸石分子筛催化剂，并分别对制得的整体式催化剂进行了N2O直接催化分解的活性评价，而且还对其进行了SEM（扫描电子显微镜）表征来进行进一步分析。最后可得如下的结论：（1）两步涂覆法中Fe、Co改性的Beta、MCM-49、ZSM-5、FER、MOR分子筛中，对于N2O直接分解催化活性最高的为Co-Beta，Fe-Beta次之。（2）相同金属离子改性的不同构型整体式沸石分子筛对N2O直接分解存在较大的活性差异，其中Beta分子筛具有明显优势，表明了分子筛的构型对N2O催化分解会产生巨大的影响。（3）一步涂覆法中对于Fe-Beta的整体式催化剂的制备宜选用铝溶胶作为粘结剂，上胶量为5%。而对于Co-Beta的整体式催化剂的制备宜选用硅溶胶作为粘结剂，上胶量同样为5%。（4）整体式催化剂的制备过程中的粘结剂的选用和分子筛的构型有关，且粘结剂的量应适宜，过多或过少都不好。（5）通过SEM表征可以看到应用一步法制备的整体式催化剂要比两步法制备的在分子筛的涂覆上要更加致密，效果更好。（6）最后在经过SEM表征、活性评价、经济效益、制备难易程度综合分析后得出一步涂覆法整体上要优于两步涂覆法。 关键词：整体式沸石分子筛， 堇青石， Beta， N2O催化分解 The Research of monolithic catalysts applied to the nitrous oxide decomposition Abstract：Firstly, based Beta, MCM-49, ZSM-5, FER and MOR which are five different configurations of zeolite, and by the application of liquid ion exchange modification, we prepare a series?of zeolite that are modification by Fe ion exchange and Co ion exchange. Then based cordierite Beta monolithic zeolite catalyst are prepared by the one-step of washcoating method and two-step washcoating and do the activity evaluation experiment of the direct catalytic decomposition of N2O . And in this experiment, the monolithic zeolite catalyst also were characterized by means of SEM characterization for further analysis. Finally, we can get the following conclusions: (1) In two-step washcoating method the Co-Beta and Fe-Beta monolithic zeolite catalyst of N2O. (2) The monolithic zeolite catalyst of the different configurations but the same metal ion exchange of N2O and the Beta zeolite one-step washcoating method the Fe-Beta monolithic zeolite catalyst should be prepared by using aluminum sol as a binder with 5% of the amount of glue. Preparation of Co-Beta monolithic zeolite catalyst should use silica sol as a binder with 5% of the amount of glue. (4)The selection of the binder in preparation of monolithic c