Approval for floating NH3 production unit

The NH3 FPSO concept is now ready for its basic design phase. It is being developed by Netherland-based SwitchH2 and Norway-based BW Offshore and will be built through either converting an existing Very Large Crude Carrier (VLCC) or by using a dedicated newbuild vessel.

“The AiP covers all aspects of the integrated vessel concept including structural integrity, mooring, ammonia production, ammonia storage and cargo handling,” said DNV’s vice president, business development for floating production, Conn Fagan.

“We are pleased to see such developments both with regard to use of renewable energy and as a contribution to emission reduction across many potential applications in different industry sectors,” he added.

Receiving power primarily from a wind farm, the unit will produce hydrogen by electrolysis of seawater and nitrogen through the use of an air separation unit, combining these in an ammonia synthesis unit.

The ammonia gas produced by the unit will be condensed, and the liquid ammonia will be stored in the hull in order to be subsequently offloaded to an ammonia carrier.

The NH3 FPSO will be permanently moored but can be relocated as necessary through planned disconnect. The offloading will be done through a floating hose, reeled from the aft ship to the shuttle ammonia carrier midship manifold.