Treatment of off-gases from liquefied gas desulfurization and gasoline desulfurization
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What treatment methods are employed for the exhaust gases generated by the alkaline solution regeneration system for catalytic liquefied gas desulfurization, as well as those produced by the gasoline refining system?
The exhaust gas generated by the liquefied gas desulfurization and alcohol removal alkaline solution regeneration system is typically absorbed by an absorbent to remove harmful gases such as carbon dioxide, after which it is heated for reuse or discharged. The exhaust gases generated by the gasoline refining system are more complex, and multi-stage treatment methods are generally employed. First, catalytic reactions are carried out using a catalyst to remove harmful gases such as nitrogen oxides and hydrocarbons ； Then, harmful gases such as hydrogen sulfide in the exhaust gas are removed using adsorbents ； Finally, the exhaust gas is further purified using methods such as activated carbon filtration or surface tension turbulence technology. The exhaust gas after final treatment is either released into the atmosphere or used to produce other chemicals. .
The exhaust gas can be pressurized by a compressor and then returned to the oxidation regeneration tower for reuse. By controlling the oxygen and hydrocarbon content at the compressor outlet, zero emissions can be achieved