Catalyst attrition in ebullated-bed hydrotreator operations |
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Authors: | Ezra K. T. Kam Fatma Jasam Mohammad Al-Mashan |
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Affiliation: | a Kuwait Institute for Scientific Research, Petroleum Research and Studies Center, Ahmadi, Kuwait b Kuwait National Petroleum Company, Shuaiba Refinery, Ahmadi, Kuwait |
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Abstract: | The catalyst level of the ebullated-bed is an important process indicator in operating the H-oil hydrotreating unit in Shuaiba Refinery, Kuwait National Petroleum Company (KNPC). In an attempt to use mixed hydrotreating catalysts in one of the H-oil reactors, the catalyst bed expanded more than usual, and the level was very unstable. Moreover, a reduced unit performance and unstable operations were resulted, which led to the unit shut down and process time loss. In a joint study between the Petroleum Technology Department at Kuwait Institute for Scientific Research (KISR) and KNPC, the hydrodynamics of the mixed and individual catalysts in a cold flow ebullated-bed reactor (EBR) were found to be very different, though the two catalysts had similar physical properties. Further study revealed that catalyst attrition was a very important factor in contributing such reactor behaviours. |
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Keywords: | Catalyst attrition Hydrotreating catalyst Ebullated-bed |
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