H.J. Kagn, M-S Shin
Korea Research Institute of Ships and Ocean Engineering (KRISO), Korea
pp. 588 - 591
Keywords: natural gas hydrate (NGH), supply chain, NGH carrier, NGH pellet, pellet adhesion
A number of countries and institutions are attempting to develop Natural Gas Hydrate (henceforth NGH) related technologies since NGH serves economic feasibility for mid-size gas-field development. However, there are several technical, economic and procedural problems still remain. Despite the continued development in NGHP (Natural Gas Hydrate Pellet) production, a number of problems remain to construct supply chain. Specifically, ‘Mid’ and ‘Down-stream’ steps have several issues to be considered. For bulk-carrier-type NGHP carriers, which were suggested in 2007, the connection between NGHPs and longer cargo working times are serious. In addition, several chemicals containing hot water are required for the regasification process. In addition, the glycol water should be purified before disposal. The need for new rules and regulations for NGHP carriers are also a barrier for NGHP carriers. Therefore, an alternative design for NGHP carriers has been studied. The pros and cons of the existing proposal for an NGHP carrier have been evaluated. In addition, a new type of NGH carrier has been suggested for utilizing natural gas resources in forms of both slurry and pellet. New design can improve existing design concept’s limitations technically and economically. By using existing feeder class container ships with energy saving device, enhanced unloading and regasification time and environmental friendliness will reduce cost burden for developing mid-stream supply chain of NGH.