Process Section – Daily Hydrogenation Process Knowledge Question No. 045
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What is hydrogen partial pressure? Answer: It refers to the pressure of the hydrogen component within the reactor during a hydrogenation reaction.
The hydrogen partial pressure can be simply understood as the pressure of hydrogen gas within the total gas pressure. In other words, if the total pressure of the system is set at 2.0 MPa and the hydrogen concentration is 80%, then the hydrogen partial pressure will be 2.0 × 80% = 1.6 MPa. If high-purity hydrogen is used, then the hydrogen partial pressure will equal the total system pressure. The higher the hydrogen partial pressure, the better. Simply put, the hydrogen partial pressure is the flow rate of circulating hydrogen. The more hydrogen there is, the higher the purity, which allows for more effective removal of metallic substances from the crude oil during the reaction. It also enables more efficient alkanes isomerization in the crude oil, and alkanes isomerization is something desired in hydrogenation reactions. However, in actual production, the cost of hydrogen also needs to be taken into account. The commonly referenced hydrogen partial pressure is 400–1000! The effect of reaction pressure is manifested through the hydrogen partial pressure. The hydrogen partial pressure in the system is determined by the operating pressure, hydrogen-to-oil ratio, purity of the recycled hydrogen, and the vaporization rate of the feed oil. Increasing pressure is beneficial for hydrogenation reactions. For aromatic hydrogenation reactions constrained by thermodynamic equilibrium, the effect of pressure is particularly significant. An increase in hydrogen partial pressure raises the saturation of aromatic compounds, thereby improving the performance of related products. A high hydrogen partial pressure prolongs the catalyst’s service life by reducing its coking rate. Therefore, the operating factor increases, and the cost of the catalyst decreases.
The hydrogen partial pressure is the product of the operating pressure and the purity of hydrogen
The hydrogen partial pressure can be simply understood as the pressure of hydrogen gas within the total gas pressure. In other words, if the total pressure of the system is set at 2.0 MPa and the hydrogen concentration is 80%, then the hydrogen partial pressure will be 2.0 × 80% = 1.6 MPa. If high-purity hydrogen is used, then the hydrogen partial pressure will equal the total system pressure.
Hydrogen partial pressure: the product of the operating pressure and the purity of hydrogen.
It refers to the pressure of the hydrogen component inside the reactor during the hydrogenation reaction.
It refers to the pressure of the hydrogen component inside the reactor during the hydrogenation reaction
The hydrogen partial pressure is the product of the operating pressure and the purity of hydrogen
The percentage of volume occupied by hydrogen remains the total pressure
:It refers to the pressure of the hydrogen component inside the reactor during the hydrogenation reaction.
The hydrogen partial pressure is the product of the operating pressure and the purity of hydrogen