ENV-05-201Flexibility of Liquid Redox Processing in Refinery Sulfur Management

Description:

With over 25 years of experience, sulfur recovery via iron-based, liquid redox processing is a commercially proven approach to refinery sulfur management. The inherent characteristics of liquid redox processing, such as 100% turndown in respect to H2S concentration, flowrate and sulfur loading and single stage removal efficiencies in excess of 99.9%, makes the process attractive as a stand alone device for applications of less than 15 LTPD of sulfur of in conjunction with a Claus unit at higher capacities resulting in an overall system having a removal efficiency of 99.9+% and 100% turndown capacity. Another attractive inherent feature of iron-based, liquid redox processing is its ability to process any type of gas stream such as fuel gas, amine acid gas, and sour water stripper gas. Consequently, for refineries with Claus plants, the liquid redox process can be employed as a tail gas treatment unit, with or without a hydrogenation/hydrolysis unity, while also directly processing the sour water stripper gas relieving the Claus unit of this burden. All of this can be accomplished without recycling gas back to the Claus unit, this increasing the capacity of the Claus unit.