【Q&A Question 078】March 19, 2018
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【Q&A Question 078】March 19, 2018: Briefly explain what the purpose of filling the reactor with ceramic balls is. ① To ensure even distribution of the reactants. ② Prevent catalyst loss. ③ Prevent displacement of the catalyst bed. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Due to the limitations on the number of posts in the “One Question per Day” section, “One Image per Day” has been moved to the registered devices section; you can access it through the directory I posted. For management purposes, if you need to access content from a few days ago, please go to the summary post below to enter the “My Registration Season” event – (Note: This event is currently underway in the Chemical Engineering section). https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=18978 For the daily questions section related to chemical engineering technology training in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888971 For the daily image section related to registered equipment in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888970 For the Q&A section related to hydrogen production and hydrogenation technologies in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888968 For the daily questions section related to LNG technology in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888973 For the Q&A section from 2017 (updates have started): https://bbs.hcbbs.com/thread-1657793-1-1.html For the daily questions section from 2017 (updates have started): https://bbs.hcbbs.com/thread-1657794-1-1.html For the daily image section from 2017: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160 For the list of daily questions related to LNG in 2017: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162 For the Q&A section from 2016 (updates are complete): https://bbs.hcbbs.com/thread-1597792-1-1.html
The ceramic balls at the bottom of the catalyst serve to support the catalyst bed, prevent small particles of catalyst from falling through and clogging the mesh of the outlet trap. The ceramic balls at the top layer of the reactor serve to trap impurities and prevent or delay an increase in pressure drop across the catalyst bed during operation. They also help to avoid changes in the catalyst surface caused by high-speed fluid flow, thus preventing channeling from occurring.
①Ensure even distribution of the reactants. ② Prevent catalyst loss. ③ Prevent displacement of the catalyst bed.
It fixes the catalyst to prevent it from being lost as the medium flows, thereby allowing for more thorough and uniform contact between the oil and the catalyst
①Ensure even distribution of the reactants. ② Prevent catalyst loss. ③ Prevent displacement of the catalyst bed.
The ceramic balls at the bottom of the catalyst serve to support the catalyst bed and prevent smaller particles of catalyst in the reactor from falling through, thereby avoiding clogging of the pores in the outlet trap. The ceramic balls at the top layer of the reactor serve to trap impurities, preventing or slowing down an increase in pressure drop across the catalyst bed during operation. They also help to prevent changes in the catalyst surface caused by high-speed fluid flow, thus avoiding the occurrence of channeling.
The ceramic balls at the bottom of the catalyst serve to support the catalyst bed, prevent small particles of catalyst from falling through and clogging the mesh of the outlet trap. The ceramic balls on the top layer of the reactor should serve to contain impurities.
The ceramic balls at the bottom of the catalyst serve to support the catalyst bed, prevent small particles of catalyst from falling through and clogging the mesh of the outlet trap. The ceramic balls at the top layer of the reactor serve to trap impurities and prevent or delay an increase in pressure drop across the catalyst bed during operation. They also help to avoid changes in the catalyst surface caused by high-speed fluid flow, thus preventing channeling from occurring.
Ceramic balls are widely used in industries such as petrochemicals, fertilizers, natural gas, and environmental protection. As a covering and supporting material for catalysts in reactors as well as a tower packing, it features resistance to high temperatures and pressures, low water absorption, and stable chemical properties. It can resist corrosion from acids, bases, and other organic solvents, as well as temperature changes that occur during the production process. Its main function is to increase the distribution points of gases or liquids, as well as to support and protect the active catalyst, whose strength remains unchanged. It features 20–30% more structural micropores with adsorption properties added to the interior of the inert porcelain balls; as a result, in addition to performing the same functions of supporting catalysts and distributing gas and liquid as ordinary inert porcelain balls, it can also adsorb and filter out impurities present in oils. The impurities present in oil include particulate matter, gums, asphaltenes, and heavy metals. Although some of these impurities can be removed through the raw material filter, a considerable amount of them – such as particulate impurities smaller than 25 microns and iron ions – still cannot be filtered out. If porous ceramic balls are installed at the top of the reactor, the impurities that have not been filtered out from the raw materials can be adsorbed within their pores, thereby protecting the catalyst and extending the operational life of the device. Depending on the types, concentrations, and particle sizes of impurities present in the processes carried out in hydrogenation, hydrogen production, and reforming units, users choose porous ceramic balls with different pore diameters and numbers of pores. Additionally, active components such as molybdenum, nickel, and cobalt can be incorporated as needed to prevent catalyst coking, deposition of carbon deposits, and poisoning.