Bulk CrZrO_x, supported CrO_x/LaZrO_x, and CrO_x/Al₂O₃ catalysts were prepared with Cr surface site density varying between 0.04 and 2.3 nm⁻². They were characterized by BET, XRD, temperature-programmed reduction with H₂, and NH₃ temperature-programmed desorption. Their activity, selectivity, and durability in non-oxidative propane dehydrogenation (PDH) were determined under industrially relevant conditions. The catalysts on the basis of ZrO₂ outperform their Al₂O₃-based counterparts in terms of PDH activity. This was explained by the presence of two catalytically active sites, i.e. CrO_x and coordinatively unsaturated Zr⁴⁺ (Zr_cus) sites. The former species promote formation of Zr_cus under reaction conditions or upon reductive catalyst treatment.

Practical relevance of CrZrO_x and CrO_x/LaZrO_x catalysts was checked in a series of 10 PDH/regeneration cycles performed at 550 °C. The catalysts possessing up to 40 times lower chromium content performed superior to an analogue of commercial K-CrO_x/Al₂O₃ with respect to space time yield of propene and the amount of propene formed within one PDH cycle. In terms of durability, bulk promoting of ZrO₂ with Cr was found to be advantageous over simple deposition of CrO_x on the surface of LaZrO_x.

制备了Cr表面密度在0.04〜2.3 nm ^-2之间变化的块状CrZrO _x，负载型CrO _x / LaZrO _x和CrO _x / Al ₂ O ₃催化剂。它们的特征在于BET，XRD，H ₂的程序升温还原和NH _3程序升温脱附。在工业上相关的条件下确定了它们在非氧化丙烷脱氢（PDH）中的活性，选择性和耐久性。基于ZrO ₂的催化剂的性能优于其Al ₂ O ₃在PDH活性方面基于-的对应对象。这是由于存在两个催化活性位点，即CrO _x和配位不饱和Zr ⁴⁺（Zr _cus）位点而解释的。前者在反应条件下或在还原性催化剂处理下促进Zr _cus的形成。

CrZrO _x和CrO _x / LaZrO _x催化剂的实际相关性在550°C下进行的10次PDH /再生循环中进行了检查。就丙烯的时空产率和在一个PDH循环中形成的丙烯的量而言，具有低铬含量多达40倍的催化剂表现出优于市售K-CrO _x / Al ₂ O ₃的类似物。在耐久性方面，散装的ZrO促进₂含Cr被发现是有利的CrO以上的简单沉积_X的表面上的LaZrO _X。