Please advise on the reactor space velocity
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We are conducting experiments, using crude benzene and hydrogen as raw materials. It is necessary to know the space-time in the reaction; I looked up some information on this topic, and what was mentioned there was mostly regarding \"liquid space velocity\". However, after benzene and hydrogen are mixed in the evaporator and then enter the reactor, they are both in gaseous form – so how can it be \"liquid space velocity\"? Does this term refer only to the cold raw material, benzene? I would appreciate some advice from all of you experts!
The liquid space velocity refers, of course, only to benzene. The ratio of hydrogen is not fixed, and it is often described using the \"hydrogen-to-oil ratio\". By knowing the space velocity of benzene and specifying the hydrogen-to-oil ratio, the entire feed situation becomes clear.
Reply to 2# DXJ122: Thank you! Indeed, a ratio for light benzene has been specified, which is 700:1 to 900:1. One more question: in the benzene hydrogenation reaction, is it better to use a rotameter or a mass flow meter for feeding?
Reply to 3# qingbay: I have only worked with industrial plants for the hydrogenation of crude benzene. Since you are dealing with experiments, it depends on your financial resources, as the price of mass meters is several dozen times higher, or even more.
Reply to 4# DXJ122: I understand. I’ll ask my supervisor which one they would like to buy!
If it is a laboratory, it is highly recommended to use a mass flow meter; rotameters are too unstable
Reply to 6# tiantov: Well, I asked yesterday, and the supervisor also tends to prefer using a mass flow meter