The Global biofuel market is currently dominated by bioethanol and biodiesel, but a new superior fuel – n butanol – is poised to enter the market. Biobutanol was legally recognised as a biofuel by incorporation in the 2009 amendment to the UK Renewable Transport Fuel Obligation(RTFO).
- it has almost the same calorific energy value as petrol/gasoline, and therefore has 25% more energy per unit volume than bioethanol (which means that its replacement value against the RTFO is higher, and it offers more value to consumers as a road fuel);
- it has a lower vapour pressure and higher flashpoint than bioethanol (which makes it easier to store and safer to handle);
- it can be blended at a refinery without requiring modifications in blending facilities, storage tanks or retail station pumps;
- it can run in unmodified engines at any blend with petrol (although current car warranties may be invalidated by blends with more than 10%) and may also be blended with diesel and biodiesel;
- it is less corrosive than bioethanol and can be transported using existing infrastructures.