The presence of sulphur in marine fuel oil relates to health and environmental concerns, as the respective combustion generates sulphur dioxide (SO₂). The only method to control this SO₂ generation is to limit the quantity of sulphur in the fuel. Shipping activities, although not the main source, contribute around 13% of the total anthropogenic SO₂ IMO-3GHG [2015. Third IMO Greenhouse Gas Study, 3rd ed. London: International Maritime Organisation]; on a positive note, this is expected to reduce after the worldwide implementation of 0.5% sulphur regulation for marine fuel. One of the accepted methods to comply with the regulatory criteria is the use of alternate fuel, i.e. liquefied natural gas (LNG). The analysis in hand discusses the potential benefits of LNG as a marine fuel. The technical limitation associated with the formation of sulphuric acid (H₂SO₄) is directly related to its Dew point, as it condenses below 160°C and causes acidic corrosion of machinery components. The prevalent combustion-based systems are maintaining a safe and economical exhaust gas range between 150°C and 170°C. If the exhaust gas temperature is higher than 170°C excessive heat is lost, which makes the plant inefficient; in contrast, if the temperature drops below 150°C there is the possibility of corrosion damage to the equipment. Considering that LNG is absolutely free from sulphur contamination, it can be used to overcome this technical limitation and add to the overall thermal efficiency due to the availability of increased operating range.

船用燃料油中硫的存在与健康和环境问题有关，因为相应的燃烧会产生二氧化硫 (SO ₂ )。控制这种 SO ₂生成的唯一方法是限制燃料中的硫含量。航运活动虽然不是主要来源，但占人为 SO _{2总量的 13% 左右}IMO-3GHG [2015. 第三次 IMO 温室气体研究，第 3 版。伦敦：国际海事组织]；积极的一面是，在全球范围内对船用燃料实施 0.5% 的硫含量规定后，预计这一数字将减少。符合监管标准的公认方法之一是使用替代燃料，即液化天然气 (LNG)。手头的分析讨论了液化天然气作为船用燃料的潜在好处。与形成硫酸（H ₂ SO _{4 ）相关的技术限制}) 与其露点直接相关，因为它在 160°C 以下冷凝并导致机械部件发生酸性腐蚀。流行的基于燃烧的系统将废气温度保持在 150°C 至 170°C 之间，既安全又经济。如果废气温度高于170°C，就会有过多的热量散失，从而使工厂效率低下；相反，如果温度降至 150°C 以下，则设备可能会受到腐蚀损坏。考虑到液化天然气绝对没有硫污染，它可以用来克服这一技术限制，并由于增加的操作范围的可用性而增加了整体热效率。