【Q&A Question 020】2017.01.20
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This post was last edited by 955559 on 2017-7-21 at 12:48. [Q&A Question No. 020] 2017.01.20: What is the impact of the hydrogen-to-oil ratio on the oil produced in hydrogenation reactions? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) 1. Maintaining a high hydrogen partial pressure helps to suppress the condensation coking reaction. 2. A large amount of circulating hydrogen and cold hydrogen can increase the heat capacity of the reaction system, thereby reducing the magnitude of changes in reaction temperature. 3. Removing a large amount of heat from the reactor helps to mitigate the temperature rise in the catalyst bed, thus expanding the temperature range within which the catalyst can be used. Summary post of Q&A questions for 2017 (updates have started) http://bbs.hcbbs.com/thread-1657793-1-1.html Summary post of daily questions for 2017 (updates have started) http://bbs.hcbbs.com/thread-1657794-1-1.html Summary post of Q&A questions for 2016 (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Xinchang Cup – 2016 HaiChuan Top 10 Selection – Please recommend candidates http://bbs.hcbbs.com/thread-1654112-1-1.html Third round of evaluation for outstanding management members at HaiChuan http://bbs.hcbbs.com/thread-1655902-1-1.html “Creative Ideas for Energy Saving” campaign in the Petrochemical Sector http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones available for grabs. Summary post collecting chemical industry technical materials from the “Petrochemical Section” http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes waiting for you (Source: HaiChuan Chemical Forum)
A high hydrogen-to-oil ratio is favorable for the hydrogenation reaction; however, an excessively high ratio increases power consumption
Inhibit the condensation reaction, prevent catalyst coking, remove heat generated by the reaction to avoid overheating of the catalyst bed, and supply reaction hydrogen
The effects are multi-faceted: 1. The impact on the effective hydrogen partial pressure inside the reactor. 2. Effect on the coking rate of the catalyst. 3. Effect on the residence time of the reactants. 4. Effect on the catalyst bed temperature. 5. Impact on liquid distribution in the reactor. An excessively high hydrogen-to-oil ratio will increase the load on the recycle hydrogen compressor and raise energy consumption. Moreover, such a high ratio reduces the chance of contact between the reactants and the catalyst surface, thereby slowing down the reaction rate. An excessively low hydrogen-to-oil ratio not only reduces the reaction rate, hindering the progress of the hydrogenation reaction, but also exacerbates catalyst coking, affecting its service life. Additionally, heat cannot be removed in a timely manner, compromising safety.
The first is the process that affects the reaction； Second, it affects the catalyst lifespan ； Third, an excessively high hydrogen-to-oil ratio will increase the operating costs and equipment investment of the facility.
1. Maintaining a high hydrogen partial pressure helps to suppress the condensation coking reaction. 2. A large amount of circulating hydrogen and cold hydrogen can increase the heat capacity of the reaction system, thereby reducing the magnitude of changes in reaction temperature. 3. Removing a large amount of heat from the reactor helps to mitigate the temperature rise in the catalyst bed, thus expanding the temperature range within which the catalyst can be used
It is a process that affects the reaction； Second, it affects the catalyst lifespan ； Third, an excessively high hydrogen-to-oil ratio will increase the operating costs and equipment investment of the facility.
A high hydrogen-to-oil ratio ensures that the reaction oil undergoes the reaction properly and protects the catalyst； A low hydrogen-to-oil ratio is not favorable for the reaction
The hydrogen-to-oil ratio is the ratio of the gas flow rate entering the reactor per unit time to the amount of feed oil. In industrial plants, the volume hydrogen-to-oil ratio is commonly used; it refers to the standard volume of recycle hydrogen required per unit volume of feed per hour. The influence of the hydrogen-to-oil ratio on the hydrogenation process mainly lies in three aspects: first, it affects the reaction process ； Second, it affects the catalyst lifespan ； Third, an excessively high hydrogen-to-oil ratio will increase the operating costs and equipment investment of the facility
The effects are multi-faceted: 1. The impact on the effective hydrogen partial pressure inside the reactor. 2. Effect on the coking rate of the catalyst. 3. Effect on the residence time of the reactants. 4. Effect on the catalyst bed temperature. 5. Impact on liquid distribution in the reactor. An excessively high hydrogen-to-oil ratio will increase the load on the recycle hydrogen compressor and raise energy consumption. Moreover, such a high ratio reduces the chance of contact between the reactants and the catalyst surface, thereby slowing down the reaction rate. An excessively low hydrogen-to-oil ratio not only reduces the reaction rate, hindering the progress of the hydrogenation reaction, but also exacerbates catalyst coking, affecting its service life. Additionally, heat cannot be removed in a timely manner, compromising safety.
The hydrogen-to-oil ratio is the ratio of the gas flow rate entering the reactor per unit time to the amount of feed oil. In industrial plants, the volume hydrogen-to-oil ratio is commonly used; it refers to the standard volume of recycle hydrogen required per unit volume of feed per hour. The influence of the hydrogen-to-oil ratio on the hydrogenation process mainly lies in three aspects: first, it affects the reaction process ； Second, it affects the catalyst lifespan ； Third, an excessively high hydrogen-to-oil ratio will increase the operating costs and equipment investment of the facility.