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What are the reaction types of fixed bed reactors?
Release time:
Jul 01,2022
The fixed bed reactor has the characteristics of small footprint and low power loss. Of course, it is the same as other products when used.There is also a lot of information that we need to know.So what are the reaction types of fixed bed reactors?Let's introduce it to you.
According to the detailed analysis of the fixed bed reactor, the reactions in the fine chemical and pharmaceutical industries can be divided into 3 levels according to their kinetic principles.It is worth noting that more than 70% of such reactions are currently operated in a semi-intermittent manner.Moreover, the reaction activity is controlled by the amount of a certain material, which causes the relative reaction volume of the reactor to be too large and the space-time yield to be low. In principle, a continuously running reactor will be more suitable for this kind of reaction power.When the fixed bed reactor is in use, these proven results are re-analyzed in the continuous process, and three reaction types are established. The continuous production process plays a positive role in these reactions.When using it, everyone must know that this reaction mainly occurs in the mixing zone and is controlled by the mixing process (micro-mixing field).It will also play a good role in this.For example, the form of flow and mixing devices plays an important role.And the microstructure organization is required to control the local temperature gradient.
Type A reactions involve a variety of active substances, such as chlorine, bromine, amine and acyl chloride, and are often formed at about 0℃. Organic reactions (lithium and oxygen reactions) also belong to this type, and there is usually a need for low temperature.There is also a type B reaction in a fixed bed reactor: it has a fast speed and a occurrence speed between 1~10sec.When used, it is mainly controlled by dynamics. However, these reactions also benefit from microstructure, so in this case, the heat flow and reaction temperature will naturally be better controlled.Moreover, conventional systems, shell-and-tube heat exchangers, usually produce high temperature gradients due to less selectivity.And mixing reactions to this kind of thing is not very critical, so it is recommended that everyone pay more attention when using it.Of course, there is also a common type C reaction.When working, it is mainly a slow reaction (reaction time>10min). From a mechanical point of view, this reaction is more suitable for intermittent processes, but there are some better methods.But continuous response will be safer and have quality advantages.
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