Abstract: A tube cleaning system and method including a nozzle holder operable to secure nozzles in a nozzle arrangement, the nozzle arrangement corresponding to an arrangement of tubes of a tube bundle, and a nozzle positioning system operable to move the nozzle holder and nozzles secured therein, to cause the nozzles to engage a set of tubes of the tubes of the tube bundle, the nozzles configured to direct cleaning fluid into the set of tubes.

Abstract: There are provided methods of treating a catalyst-containing reactor system with a liquid solvent to remove contaminants from the reactor system. An exemplary method includes the steps of: isolating the reactor system to be treated from upstream and downstream equipment; reducing the temperature and pressure of the isolated reactor system by flushing with a hydrogen rich gas; injecting a non-aqueous liquid solvent into the reactor system at an injection point while continuously flowing hydrogen-rich gas through the reactor system; maintaining the solvent in a liquid state while flowing the solvent continuously through the reactor system; and terminating the step of injecting solvent and terminating the continuous flowing of hydrogen-rich gas. The exemplary method is free of the injecting of a carrier gas into the reactor system comprising alkanes selected from the methane, ethane, propane, butane and pentane.

Abstract: There are provided methods of treating a catalyst-containing reactor system with a liquid solvent to remove contaminants from the reactor system. An exemplary method includes the steps of: isolating the reactor system to be treated from upstream and downstream equipment; reducing the temperature and pressure of the isolated reactor system by flushing with a hydrogen rich gas; injecting a non-aqueous liquid solvent into the reactor system at an injection point while continuously flowing hydrogen-rich gas through the reactor system; maintaining the solvent in a liquid state while flowing the solvent continuously through the reactor system; and terminating the step of injecting solvent and terminating the continuous flowing of hydrogen-rich gas. The exemplary method is free of the injecting of a carrier gas into the reactor system comprising alkanes selected from the methane, ethane, propane, butane and pentane.