Operational challenges of the primeG+ selective hydrogenation reactor
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I would like to ask the experts here: in the primeG+ selective hydrogenation reactor, \"hydrogen mainly serves to saturate dienes, while the reactor temperature is used to control the transfer of light thiols to heavy thiols.\" ”Is this sentence correct? I would like to ask everyone: what is the hydrocarbon-to-hydrogen ratio of the selective hydrogenation unit using the same process? How often should the diene content in the raw materials and the mercaptan sulfur content in light gasoline be measured, and what are the acceptable values? Please help out, everyone.
The hydrocarbon-to-hydrogen ratio is a calculated value based on the properties of the raw material, and it is related to the sulfur content and diene content in your raw material； If the properties of the raw material are poor, the hydrogen-to-hydrocarbon ratio is high and the degree of reaction is greater; the opposite is true. If the properties of the raw material are stable, it is generally sufficient to take samples for analysis after a certain period of time
The advantage of primeG+ lies in selective hydrogenation saturation and selective hydrogenation desulfurization – that is, only dienes are saturated while monoenes are not. The saturation of dienes takes place within a protected reactor at a low temperature, which prevents the saturation of monoenes； Therefore, in the hydrodesulfurization reactor, if the temperature rise is too large, it indicates that the monoolefins have been saturated, and the octane number will decrease. So what you said is correct.
What this sentence means is that an adequate supply of hydrogen helps to saturate dienes; the problem is that it facilitates the conversion of light thiols into heavier ones. Generally, the hydrogen-to-oil ratio ranges from 10 to 50. It depends on the actual test results; the dienes, thiol sulfurs in the raw materials vary depending on their source, and there is no specific value – they can all be measured. It’s not a very difficult question either.