The treatment of sulfur recovery off-gases employs a reduction-absorption process, with the intention of supplying hydrogen externally
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The author simulated sulfur recovery, using a reduction-absorption process, namely the RAR process, for exhaust gas treatment, with the intention of supplying hydrogen externally. Simulation was carried out using the sulfur recovery SULSIM module in HYSYS; the results showed that no external hydrogen supply was needed at all – the hydrogen generated in the acid gas combustion furnace was sufficient for use in the hydrogenation reactor. Does such a phenomenon occur in reality? I seek advice from the experts
Although the process gas contains a certain amount of hydrogen, it may not be sufficient without additional hydrogen supply.
It is influenced by many factors: mainly the impact of the Claus sulfur recovery rate mentioned earlier, as well as the impact of the organic chlorine conversion rate. If the process gas contains about 3% hydrogen, the addition of hydrogen to the exhaust gases can suffice to reduce organic sulfur content.