|In service:||Mozah, Al Mayeda, Mekaines, Al Mafyar, Umm Slal, Bu Samra, Al-Ghuwairiya, Lijmiliya, Al Samriya, Al Dafna, Shagra, Zarga, Aamira, Rasheeda|
|Length:||345 m (1,132 ft)|
|Beam:||53.8 m (177 ft)|
|Height:||34.7 m (114 ft)|
|Draft:||12 m (39 ft)|
|Installed power:||21,770 kW at 91 rpm, per engine|
|Propulsion:||2 × MAN B&W 7S70ME-C two-stroke low speed diesel, electronically controlled|
|Capacity:||266,000 m3 (9,400,000 cu ft)|
Q-Max is a type of ship, specifically a membrane type liquefied natural gas carrier. In the name Q-Max, "Q" stands for Qatar and "Max" for the maximum size of ship able to dock at the LNG terminals in Qatar. Ships of this type are the largest LNG carriers in the world.
It has an LNG capacity of 266,000 cubic metres (9,400,000 cu ft), equal to 161,994,000 cubic metres (5.7208×109 cu ft) of natural gas. It is propelled by two slow speed diesel engines, which are claimed to be more efficient and environmentally friendly than traditional steam turbines.
Q-Max vessels are equipped with an on-board re-liquefaction system to handle the boil-off gas, liquefy it and return the LNG to the cargo tanks. The on-board re-liquefaction system allows a reduction of LNG losses, which produces economic and environmental benefits.
Overall, it is estimated that Q-Max carriers have about 40% lower energy requirements and carbon emissions than conventional LNG carriers. The quoted estimates do however ignore the additional fuel used to re-liquify boil off gas rather than burn the gas for fuel. The ships can be converted to use the boil-off gas but as of February 2013 none have yet been converted.
Q-Max LNG carriers were ordered in 2005. They are to be built by Samsung Heavy Industries and Daewoo Shipbuilding & Marine Engineering. The installed Boil Off Gas re-liquefaction system (Ecorel) is developed and delivered by Cryostar, and approved and certified by Lloyds Register.
The first Q-Max LNG carrier was floated out of dry-dock in November 2007. The naming ceremony was held on 11 July 2008 at Samsung Heavy Industries' shipyard on Geoje Island, South Korea. Known before its naming ceremony as Hull 1675, the ship was named Mozah by Her Highness Sheikha Mozah Nasser al-Misnad. Mozah was delivered on 29 September 2008. It is classed by Lloyd's Register. The first trip by a Q-Max tanker was completed by Mozah itself on 11 January 2009, when the tanker delivered 266,000 cubic metres of LNG to the Port of Bilbao BBG Terminal. Days before, the vessel had transited the Suez Canal for the first time.
Q-Max LNG carriers are operated by the STASCo (Shell International Trading and Shipping Company, London part of Shell International. They are owned by Qatar Gas Transport Company (Nakilat) and they are chartered to Qatar's LNG producers Qatargas and RasGas. In total, contracts have been signed for the construction of 14 Q-Max vessels.
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