Low Severity Desulfurization
Sulfex is a novel low temperature, low pressure process for removal of sulphur to less than 10 ppm in light distillates e.g. naphtha, kerosene, diesel and gasoline without significantly altering vital fuel properties. The process uses hydrogen peroxide instead of hydrogen and thus avoids the severity of conventional hydro-desulfurization process and risk of hydrogen environment.
Sulfex is developed and patented by AET corporation at Reno, Nevada, USA. Pyramid E&C has a global collaboration agreement on design and build services with AET. The technology has been successfully tested for several distillates in AET labs at Reno over the last decades and now Pyramid E&C has built the first commercial unit of 1000 BPD capacity and delivered to AET at Richmond, Virginia for installation in a mid-stream operator facility.
Process Overview
SULFEX removes sulphur through a controlled oxidation and sorption process:
- The process operates at 2 bar pressure and 120°Celsius temperature.
- Distillate feed is gently preheated to optimal reaction temperature
- Sulphur compounds are oxidized using a proprietary catalyst–oxidant system
- Oxidized sulphur species are selectively removed through multi-stage sorption
- Reagents and sorbents are recovered and recycled, minimizing waste
- Lab tested for 5000ppm feedstocks reduced to less than 10 ppm Sulphur
Benefits
- Lower CAPEX & OPEX compared to hydro-desulfurization units
- No hydrogen requirement – safer and simpler operation
- Mild operating conditions reduce energy consumption
- High yield with minimal quantity and quality loss
- Environmentally friendly with recyclable reagents and sorbents
- Small scale, modular operations feasible
Available In
1000 BPD
5000 BPD
10000 BPD
Our first 1,000 BPD module has been successfully delivered to AET at Richmond, Virginia.
PEC/HYDROBLUE/ISMR/IN
DEC/2025
