The challenge for the conversion of alternative crude sources to aromatics is to retain aromatic rings in the hydrotreating process. The design of unique catalyst with low damage to the aromatic rings but with high ability to break C-N and C-C bonds is essential. Herein, defect-rich α-MoC supported on nitrogen-doped carbon (NC) was constructed to transform quinoline-like N-heterocyclic compounds to aromatics. The incorporation of NC increased the content of highly active coordination unsaturated Mo sites related to C or O defects and promoted the desorption and spillover of H₂. Moreover, the introduction of NC strengthened the electron donating ability of Mo and enhanced the adsorption strength of quinoline on catalyst surface. Consequently, the ability of molybdenum carbide to break C-N and C-C bonds was enhanced. The selectivity of products from C-N bonds breaking reached to 99.5%, and the selectivity of aromatic products from C-C bonds breaking reached to 58.1%. Meanwhile, the aromatic ring was highly preserved. The selectivity of aromatics achieved an impressive level of 85.1% over α-MoC/NC-0.2. The processing capacity of α-MoC/NC-0.2 was 1.3 times that of α-MoC. The stability of α-MoC/NC remained exceptional even when subjected to high liquid hourly space velocity.

中文翻译：

---

在氮掺杂多孔碳上负载的富含缺陷的 α-MoC，用于将喹啉转化为芳烃


将替代原油来源转化为芳烃的挑战是在加氢处理过程中保留芳烃环。设计对芳香环损伤小但破坏 C-N 和 C-C 键的能力强的独特催化剂是必不可少的。在此，构建了氮掺杂碳 （NC） 负载的富含缺陷的 α-MoC，将喹啉样 N-杂环化合物转化为芳烃。NC 的掺入增加了与 C 或 O 缺陷相关的高活性配位不饱和 Mo 位点的含量，并促进了 H₂ 的解吸和溢出。此外，NC 的引入增强了 Mo 的供电子能力，增强了喹啉在催化剂表面的吸附强度。因此，碳化钼破坏 C-N 和 C-C 键的能力得到增强。产物对 C-N 键断裂的选择性达到 99.5%，芳香族产物对 C-C 键断裂的选择性达到 58.1%。同时，芳香环被高度保存。芳烃的选择性达到了令人印象深刻的 85.1% 的 α-MoC/NC-0.2 水平。α-MoC/NC-0.2 的处理能力是 α-MoC 的 1.3 倍。即使在高液体每小时空速下，α-MoC/NC 的稳定性也保持优异。