Sulfur Polishing for Light Feeds
FlexULS is an adsorption-based process designed to reduce sulfur and nitrogen content in distillates, crude oils, and petrochemical streams without the use of hydrogen or induced pressure. The process applies to feedstocks with sulfur levels below 1,000 ppm.
Performance and Treatment Outcomes
Sulfur Reduction
Following treatment, sulfur content is typically reduced to less than 10 ppm. This level meets the requirements for ultra-low sulfur fuel specifications.
Nitrogen Reduction
In addition to sulfur removal, the process can result in a 25–60% reduction in nitrogen, depending on the composition of the feedstock.
Greenhouse Gas Emissions
FlexULS contributes to a GHG emissions reduction of up to 70%, as it avoids the energy demands associated with high-pressure hydrogen-based desulfurization systems.
Process Characteristics
Ambient Operating Conditions
The FlexULS process operates at ambient temperature and does not require hydrogen or applied pressure. This allows for lower energy consumption during treatment.
Fixed-Bed Reactor Design
The process uses fixed-bed reactors containing a proprietary adsorbent. This setup enables effective separation of impurities without saturating or oxidizing the hydrocarbon stream.
Advantages in Sulfur Polishing Applications
Preservation of Hydrocarbon Structure
Unlike other treatments, this process does not oxygenate or saturate the hydrocarbon stream. As a result, it maintains the original chemical integrity of the treated material.
Adaptability to Light Streams
FlexULS is suitable for light crude oils and distillates, offering flexibility in treating a wide range of petroleum streams.
Small Footprint and Lower Infrastructure Demands
Due to its small physical footprint, FlexULS is deployable in settings where traditional hydroprocessing units may not be feasible due to space or infrastructure constraints.
Reduced Capital Requirements
The process requires lower capital investment, supported by the use of tailored regeneration solvents and just-in-time replenishment methods, which contribute to operational efficiency.
Role in Achieving Ultra-Low Sulfur Specifications
FlexULS provides a method for improving feedstock quality and meeting stringent fuel sulfur content regulations. Through the removal of impurities at room temperature and without pressure, it addresses sulfur polishing needs for light streams while reducing emissions and maintaining feed integrity.