How to understand the situation where there is less gas in the vapor phase during liquid-phase hydrogenation and the buoyancy of the gas is high?
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The SLHT continuous liquid-phase hydrogenation unit differs from other such units in that it uses an upflow reactor; the gas-liquid mixture of the reaction stream flows upward through the catalyst bed, with the flow direction being consistent with the direction of gas diffusion. This arrangement minimizes the possibility of local accumulation of gas within the reactor, thereby facilitating a uniform distribution of the small amount of H2 present. In downward-flow reactors, the gas buoyancy generated under conditions of low gas flow rate is difficult to manage; exhaust measures must be implemented between the bed layers to maintain a stable liquid level, which requires complex reactor internals and instrument control systems to achieve.
The gas phase and the liquid phase cannot mix and dissolve well together
In an upward-flow process, the flow direction is consistent with that of the hydrogen gas; the liquid phase is the continuous phase while the gas phase is the dispersed phase