Metal sulfide catalysts for ultra‐deep hydrodesulfurization of diesel generally lose a fraction of their catalytically active sites during reactor startup. The underlying mechanisms are discussed. A laboratory diagnostic tool consisting of three probe molecules is developed for testing metal sulfide catalysts' start‐of‐run (SOR) activity maintenance. It is found that a significant fraction of the active sites on a commercial supported catalyst are deactivated permanently, but this is not the case with a bulk metal sulfide catalyst. The SOR deactivation of the bulk catalyst is completely reversible, while that of the supported catalyst is partially reversible. The diagnostic tool may provide a basis for developing a high‐throughput approach for evaluating and enhancing catalyst SOR stability, thereby increasing plant productivity.

中文翻译：

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反应器启动过程中加氢脱硫催化剂的失活

用于柴油超深度加氢脱硫的金属硫化物催化剂通常在反应堆启动过程中损失一部分催化活性位。讨论了潜在的机制。开发了一种由三个探针分子组成的实验室诊断工具，用于测试金属硫化物催化剂的运行（SOR）活性维持。发现在市售负载型催化剂上显着的活性位点永久性失活，但是对于块状金属硫化物催化剂却不是这种情况。本体催化剂的SOR失活是完全可逆的，而负载催化剂的SOR失活是部分可逆的。该诊断工具可为开发用于评估和增强催化剂SOR稳定性的高通量方法提供基础，从而提高工厂的生产率。