Inert Gas Confined Space Entry for

Inert Gas Confined Space Entry for Catalyst Handling
The main application of inert gas CSE in the Shell Group is for removal of spent catalysts from hydroprocess unit reactors. By keeping the catalyst under inert gas conditions whilst it is removed to a catalyst reprocessing plant, degradation of the catalyst is avoided and the need for time consuming regeneration of catalyst in the reactor can be eliminated. Thus the turnaround time of the unit can be shortened. The work is inherently hazardous because persons in the inert atmosphere are totally dependent on their breathing air system for survival. Also, any oxygen entering the confined space can cause the catalyst to ignite.

Management shall apply the HEMP process to the proposed inert gas entry activities to
demonstrate that there is no reasonably practicable alternative to inert gas entry. and that the planned controls will reduce the risk to ALARP.

This type of work is usually performed by highly experienced specialist contractors, whose
specialist knowledge is critical in the planning and implementation of a safe system of work.

The intention of this section is to detail the hazards, controls and entry criteria, specific to inert gas confined spaces.