May 2018

Special Focus: Maintenance and Reliability

Three topics for operational excellence related to a Cr-Mo hydrotreating reactor

Many end users are trying to use feedstock with higher sulfur content for their refineries to increase profitability, but numerous unknown or plausible bottlenecks exist.

Lee, S., Kim, E., Jeon, S., SK Energy

Many end users are trying to use feedstock with higher sulfur content for their refineries to increase profitability, but numerous unknown or plausible bottlenecks exist. The authors offer potential solutions and case studies for a hydrotreating reactor. Case 1: Optimization of startup/shutdown guidelines. The aim of extending the run length of the hydrotreating process is to increase productivity. The heavy-wall reactor is fabricated with Cronium-molybdenum (Cr-Mo) base material with an austenitic stainless steel (ASS) overlay inside. To avoid high thermal stresses, the maximum temperature difference of the skin temperature is strictly limited. For example, the maximum skin temperature bet

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