Abstract When fine particles suspended in the gas oil feed come in contact with the hydrotreating catalyst at the reaction conditions, there is a change in the surface chemistry of the particles and they settle on the catalyst bed. The increase of the particle concentration in the catalyst bed leads to pressure drop in the reactor and eventually to catalyst deactivation. In this study, the impacts of process parameters such as temperature and pressure on particle deposition were studied. Also, the impact of particle size, reaction time and catalyst regeneration studies were conducted. For rationalization of the batch reactor set-up, used for hydrotreating, the catalyst was packed in a catalyst basket with a forced longitudinal feed flow through the packed catalyst bed in the basket. The spent catalyst was examined using various characterization techniques to understand the physical and chemical impacts of particle deposition on the hydrotreating catalyst. It was found that temperature significantly impacts particle deposition. Asphaltene coated kaolin has a preferential deposition on the reactor assembly and thus the overall bed deposition this case was less as compared to uncoated kaolin. When there was no catalyst packed in the basket, there was negligible bed deposition. Thus, it could be inferred that catalyst-fines interaction is chemical in nature.

中文翻译：

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粗柴油细颗粒沉积在加氢处理催化剂上：工艺参数和过滤趋势的影响

摘要 当悬浮在粗柴油进料中的细颗粒在反应条件下与加氢处理催化剂接触时，颗粒的表面化学会发生变化，它们会沉淀在催化剂床上。催化剂床中颗粒浓度的增加导致反应器中的压力下降并最终导致催化剂失活。在这项研究中，研究了温度和压力等工艺参数对颗粒沉积的影响。此外，还进行了粒度、反应时间和催化剂再生的影响研究。为了使用于加氢处理的间歇式反应器装置合理化，将催化剂填充在催化剂篮中，强制纵向进料流通过篮中的填充催化剂床。使用各种表征技术检查废催化剂，以了解颗粒沉积对加氢处理催化剂的物理和化学影响。发现温度显着影响颗粒沉积。沥青质涂覆的高岭土优先沉积在反应器组件上，因此与未涂覆的高岭土相比，这种情况下的总床沉积较少。当篮中没有催化剂时，床沉积可以忽略不计。因此，可以推断催化剂-细粉相互作用本质上是化学的。沥青质涂覆的高岭土优先沉积在反应器组件上，因此与未涂覆的高岭土相比，这种情况下的总床沉积较少。当篮中没有催化剂时，床沉积可以忽略不计。因此，可以推断催化剂-细粉相互作用本质上是化学的。沥青质涂覆的高岭土优先沉积在反应器组件上，因此与未涂覆的高岭土相比，这种情况下的总床沉积较少。当篮中没有催化剂时，床沉积可以忽略不计。因此，可以推断催化剂-细粉相互作用本质上是化学的。