QTRX2 is a patented chemical formulation and procedure used to remove residual LEL and other noxious gasses (H2S, benzene, etc.) from fixed-bed reactor circuits prior to catalyst work. The technology has been successfully applied to hydrotreaters, hydrocrackers, reformers, and other fixed bed reactor units.
QTRX2 is a blend of stable organic solvents that can remove residual LEL from catalyst beds when added to hydrogen, nitrogen, or natural gas (sweeping gases) during the cool-down cycle of a reactor. QTRX2 greatly enhances the sweeping gasses’ ability to dissolve LEL from reactor circuits. Instead of relying on temperature and velocity alone to remove LEL from the catalyst bed, QTRX2 adds the property of solvency to the sweeping gas by physically solubilizing LEL away from the surface area of the catalyst. QTRX2 actually helps clean the catalyst. This is something that traditional sweeping gasses cannot do. The chemical formulation is non-water soluble and does not contain surfactants.
QTRX2 also relies on thin film distillation for reactor circuits with heavy feed (gas oil, diesel, etc.). The concept of thin film distillation spreads a hydrocarbon over a large surface area to facilitate distillation or vaporization. QTRX2 will dissolve pockets of LEL and carry them over a large surface area of catalyst. By thinning the LEL over a larger surface area, the sweeping gasses become more effective at vaporization. This prevents the occurrence of residual or pockets of LEL and allows for immediate entry.
QTRX2 has demonstrated its effectiveness in reducing contaminants on numerous fixed-bed reactor systems since inception in 2009.