Investigation of technical catalysts deactivated in industrial catalytic reactors with different oil feed compositions by nearfield ptychogr

Hydrocracking is one of the most important catalytic technologies in oil industry to convert heavy fractions of petroleum and renewable hydrocarbon feedstocks into valuable diesel and jet-fuel products. Bifunctional catalysts containing an acid and a hydrogenation functionality are crucial for this technology. Designing new catalyst formulations to outperform with different feed compositions needs the understanding of the relationship between preparation, microstructure and performance under different conditions. In proposed experiment we will investigate hydrocracking catalyst extrudates at the nanoscale using nearfield ptychographic X-ray computed tomography (PCXT), that were deactivated in real industrial catalytic reactors where the oil feed compositions have different chemical nature. The correlation of coke deposition with the microstructure can give insights to the different deactivation mechanisms for catalysts used with different feedstocks.

加氢裂化（Hydrocracking）是石油工业中至关重要的催化技术之一，可将石油重质馏分与可再生烃类原料转化为高价值的柴油及喷气燃料产品。该技术的核心离不开兼具酸性功能与加氢功能的双功能催化剂。为开发可在不同进料组成下实现更优性能的新型催化剂配方，需厘清催化剂制备过程、微观结构与不同工况下催化性能之间的内在关联。在本拟开展的实验中，我们将利用近场叠层X射线计算机断层扫描（nearfield ptychographic X-ray computed tomography, PCXT）在纳米尺度下对加氢裂化催化剂挤出物进行表征：这些催化剂挤出物是在真实工业催化反应器中失活的，且其对应进料油具有不同的化学组成特性。积碳量与催化剂微观结构的关联，可为解析不同进料对应的催化剂失活机制提供重要见解。