Japanese technology firms Osaka Gas and Daihatsu Diesel received an Approval in Principle (AIP) from ClassNK for their joint project on an LPG Reformer for marine engines. This was the first AIP granted in Japan for such equipment.
The LPG Reformer is designed to convert LPG into synthetic methane gas equivalent to the kind found in LNG, ClassNK explained.
Due to being mainly composed of propane and butane, LPG is susceptible to knocking (abnormal combustion), making it difficult to use as a fuel...
https://safety4sea.com/classnk-grants-aip-on-lpg-reformer-for-marine-engines/