System for offshore production of fuel

A system for offshore production of fuel comprising:

• an offshore marine platform;
• a liquified ammonia floating storage unit moored adjacent the marine platform and in fluid communication with the ammonia production system, the liquified ammonia floating storage unit having a plurality of liquified ammonia bulk cryogenic storage tanks together having a first total liquified ammonia storage volume;
• one or more cryogenic transfer lines extending from the marine platform to the liquified ammonia floating storage unit;
• a first pump onboard the offshore marine platform and in fluid communication with the cryogenic ammonia outlet of the liquefaction system and the plurality of liquified ammonia bulk storage tanks of the liquified ammonia floating storage unit to transfer by pumping via the cryogenic transfer lines cryogenic ammonia produced on the marine platform from marine platform to the floating storage unit;
• a water purification unit on the marine platform, the water purification unit having a purified water outlet and a seawater inlet, the seawater inlet in fluid communication with one or more seawater intakes to draw in seawater for purification;
• a hydrogen production unit on the marine platform, the hydrogen production unit having a hydrogen gas outlet and a purified water inlet, the purified water inlet in fluid communication with the purified water outlet of the water purification unit;
• a nitrogen production system on the marine platform, the nitrogen production system having a nitrogen gas outlet;
• an ammonia production system on the marine platform, the ammonia production system having a hydrogen gas inlet in fluid communication with the hydrogen gas outlet of the hydrogen production unit, a nitrogen gas inlet in fluid communication with the nitrogen gas outlet of the nitrogen production unit, and an ammonia gas outlet;
• a liquefaction system in fluid communication with the ammonia gas outlet of the ammonia production unit, the liquefaction system having a cryogenic ammonia outlet;
• a plurality of offshore wind turbines disposed to provide electricity to at least one of the hydrogen production unit, the nitrogen production system or the ammonia production system;
• and
• a liquified ammonia transport vessel having a second total liquified ammonia storage volume that is less than the first total liquified ammonia storage volume, the liquified ammonia transport vessel in fluid communication with the liquified ammonia floating storage unit.

A method for offshore production of fuel comprising:

• pumping seawater to a water purification system mounted on an offshore marine platform affixed to the seabed;
• utilizing the water purification system to at least partially purifying the pumped seawater to yield purified water;
• pumping air to a nitrogen production system mounted on an offshore marine platform;
• utilizing the nitrogen production system to produce gaseous nitrogen from the pumped air;
• utilizing a hydrogen production system mounted on the offshore marine platform to generate gaseous hydrogen from the purified water;
• utilizing an ammonia production system mounted on the offshore marine platform to produce gaseous ammonia from the gaseous nitrogen and gaseous hydrogen;
• utilizing a liquefaction system on the marine platform to convert the gaseous ammonia to cryogenic ammonia;
• pumping the cryogenic ammonia from the marine platform to a liquified ammonia floating storage unit moored adjacent the marine platform;
• gathering a sufficient quantity of cryogenic ammonia on the liquified ammonia floating storage unit and thereafter, pumping the cryogenic ammonia from the liquified ammonia floating storage unit to a liquified ammonia transport vessel, wherein the sufficient quantity of cryogenic ammonia gathered on the floating storage unit is greater than the total storage capacity of the liquified ammonia transport vessel.