[Q&A Question 234] 2016.12.10
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【Q&A Question 234】December 10, 2016: What components are included in the hydrogen consumption of a hydrogenation unit? The reference answers will be visible after responding; scoring is awarded by identifying the key points. Hydrogen consumption during the hydrogenation process includes chemical hydrogen consumption, dissolved hydrogen consumption, leakage-related hydrogen consumption, and emission-related hydrogen consumption. Summary of Q&A posts from 2016 (updated up to December) http://bbs.hcbbs.com/thread-1597792-1-1.html. Call for sponsors for the “2016 HaiChuan Top 10 Members Selection Contest” http://bbs.hcbbs.com/thread-1628108-1-1.html (Source: HaiChuan Chemical Forum)
Chemical hydrogen consumption, mechanical leakage, dissolution loss, and trace emissions
The hydrogen consumption in a hydrogenation unit includes: chemical hydrogen consumption \ dissolution losses \ mechanical leaks \ waste hydrogen emissions?
I. Hydrogen involved in the reaction. II. Hydrogen dissolved in oil. III. Hydrogen released in the exhaust gas by adjusting the hydrogen-to-carbon ratio. IV. Hydrogen leaking from the packing of the cyclohydrogen compressor.
1. Consumed in chemical reactions 2. Hydrogen released to increase the concentration of recycled hydrogen 3. Dissolved in the hydrogenation product oil 4. Leaks at pipe and equipment flange connections or other areas
These include chemical hydrogen consumption, dissolved hydrogen consumption, leakage hydrogen consumption, and emission hydrogen consumption.
Hydrogen consumption mainly includes chemical hydrogen consumption, dissolved hydrogen consumption, and leakage hydrogen consumption
1. Consumption in chemical reactions 2. Leaks from equipment and pipelines 3. Venting from storage tanks, etc
Chemical hydrogen consumption, dissolved hydrogen consumption, leaked hydrogen consumption, mechanical hydrogen consumption
The hydrogen consumption of the device includes chemical hydrogen consumption and dissolved hydrogen consumption. The chemical hydrogen consumption is primarily used for the saturation of aromatics and olefins, as well as for denitration and desulfurization. The amount of chemical hydrogen required varies depending on the type of oil and the degree of hydrogenation; it seems that there is no purely theoretical formula for calculating it. Generally, this value is derived from experimental data from research institutions ； The dissolved hydrogen consumption can be calculated based on the solubility of hydrogen in oil products, and it is generally convenient to determine this value using software simulations.
Hydrogen consumption in the hydrogenation process includes chemical hydrogen consumption, dissolved hydrogen consumption, leakage hydrogen consumption, and emission hydrogen consumption