Dual-methane expander liquefaction reduces LNG costs and complexity

G. W. Howe, G. F. Skinner and A. D. Maunder, Gasconsult Ltd., London, UK LNG producers have sought to enhance project returns through higher plant capacities to achieve economies of scale. Many complex multi-refrigerant plants were constructed to realize this objective. However, the unprecedented capital costs and financial risks associated with these mega-scale plants may be unsustainable in an era of distressed energy prices. Some operators are looking for more flexible project development and commercial models that alleviate risk; they are seeking means to monetize smaller gas reserves with lower-cost schemes. Dual-methane (DM) expandera liquefaction offers a differentiated solution for