
6 Fuel Cells
New research is now focused on using alternative technologies to develop
more efcient processes for ethanol production from a wider range of non-
food-grade biomass materials.
1.2 Renewable Energy Resources and
Alternative Energy Systems
There is increased demand to reconsider our energy supply system because
of the following reasons:
1. Global resources for fossil fuel as well as nuclear fuel are reduced
and limited as demonstrated in Figure 1.4.
2. High cost and risk of uninterrupted supply of imported oil.
3. Increased demands for energy and fossil fuels in countries with
higher economic growth.
4. Increased concern over cl ...