CuO／ZrO_2超细粒子催化剂的制备和物性结构表征Ⅱ．煅烧温度的影响

PREPARATION AND CHARACTERIZATION OF ULTRAFINE PARTICLE CuO/ZrO 2 CATALYSTS Ⅱ. Effect of Calcination Temperature on the Morphology of the Catalyst

ＣｕＯ／ＺｒＯ２超细粒子催化剂的制备和物性结构表征Ⅱ．煅烧温度的影响师江柳刘金尧朱起明（清华大学化学系一碳化工国家重点实验室，北京１０００８４）张鎏张继炎（天津大学化工系，天津３０００７２）关键词氧化铜，氧化锆，超临界流体干燥，超细粒子，煅烧，物性结...

In order to study the development and stability of the structure of the catalyst, ultrafine particle CuO/ZrO 2 catalyst (aerogel) was prepared by hydrogel ethanolgel process followed by supercritical fluid drying (SCFD) method, then calcinated in flowing air at temperatures up to 923 K. The porous texture was rather stable compared with the data from literature. The crystallite of the catalyst changed greatly with increasing temperature: copper (oxide) from none (highly dispersed) to tenorite CuO and Cu, ZrO 2 from tetragonal to monoclinic. At the same time, some of the morphology properties (such as S BET and V p) decreased, but some of them (such as R p, D a and d ) increased significantly with increasing temperature. For comparison, xerogel catalyst was also prepared. The aerogel type showed better properties and higher stability than that of xerogel type.