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•White Paper: Increase The Flexibility Of Your Claus Unit

By Gary J. Nagl, Vice President, Gas Technology Products Division Merichem Chemicals & Refinery Services LLC

With the introduction of sophisticated ratio control, O2 enrichment, improve burner design, etc. , great strides have been made in the ability of Claus units to adjust to rapidly changing feed conditions, which are experienced in both petroleum refineries and natural gas processing facilities. However, even with these advancements, some process applications still challenged Claus units with their ability to adjust to large turndown ratios while maintaining high removal and on-stream efficiencies. By incorporating a liquid redox process, such as the LO-CAT® process, together with a Claus unit, turndown ratios of 100%, removal efficiencies of 99.9+% and onstream efficiencies approaching 100% can be achieved. In addition for certain applications, the typical Claus incinerator can be eliminated, which will greatly reduce CO2 and SO2 emissions and the energy requirements to operate the incinerator. All of this can be accomplished without having to recycle gas back to the Claus.

Liquid redox processes employ aqueous-based solutions containing metal ions, usually iron, which are capable of transferring electrons in reduction-oxidation (redox) reactions. Currently, the redox process of choice is the LO-CAT® process, which is licensed by the Gas Technology Products division of Merichem Chemical & Refinery Services LLC. In this process, a non-toxic, chelated iron catalyst is employed to accelerate the reaction between H2S and oxygen to form elemental sulfur.

Click Here To Download:
•White Paper: Increase The Flexibility Of Your Claus Unit