Jan 27, 2003 - Paper on emissions of PPO by Niels Ansø,. Nordvestjysk Folkecenter for Vedvarende Energi. 2000. Available in Danish at www.folkecenter.dk.
Short note on Pure Plant Oil (PPO) as fuel for modified internal combustion engines By Dr. Peder Jensen, European Commission, DG JRC/IPTS 27.01.2003
Abstract: This note contains a short summary of main characteristics of pure plant oil (PPO) as a fuel for internal combustion engine automotive applications. The main conclusions are that: ! PPO does represent an option, which in some technical end environmental aspects are superior to other alternative fuels. ! On the other hand use of PPO entails a need for engine modifications as well as a need for a separate distribution infrastructure. There is therefore little reason to see PPO as the primary fuel of the future. On the other hand PPO is a fuel, which does have its benefits, and therefore should be given equal treatment as compared to other CO2 neutral fuels. This document was developed by The Institute for Prospective Technological Studies in Seville, Spain. IPTS is part of the Joint Research Centre under the European Commission. The document was developed at the request of The European Commission, DG TREN D1, to answer questions regarding the use of PPO as an automotive fuel. The responsibility for the conclusions rest with IPTS.
27.01.2003
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EC-DG JRC/IPTS
Pure Plant Oil (PPO) Fuel Characterisation The interest in plant or vegetable oils originated in the late 70's and came from the agrarian sector, which is still one of its main drivers. Initially, it was believed to be possible to use these oils directly with a low processing level. Extensive testing by the engine industry has shown that unmodified engines, while operating satisfactorily, would quickly develop durability problems, due to problems with fuel injectors, piston rings and lubrication oil stability. For this reason the engine must be modified. Such modifications can at present be made by a number of facilities mainly in Germany. More than 5000 vehicles are presently using pure plant oil in Germany. [ELS] Nevertheless one can still find examples of claims that PPO can be used in any unmodified engine. As an example the TV program TopGear on BBC presented the claim in November 2002, but without showing any durability test of the concept. The proponents of PPO point to many years of practical experience with the use of PPO in a wide range of modified engines and mention specifically a number of advantages of PPO over biodiesel: ! Processing is simple as the only steps are cold-pressing (
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