The escalating cost of gasoline has fueled a renewed interest in alternative fuel engines. While diesel engines are often associated with the black smoke of large trucks, it’s important to remember the original vision of its inventor, Rudolf Diesel. Diesel’s engine was successfully powered by peanut oil. He also experimented with whale oil, but petroleum-based oils became the dominant fuel due to their economic availability at the time.
Diesel himself envisioned vegetable oils playing a significant role, predicting their potential to become as important as petroleum. Despite this forward-thinking vision, the reliance on readily available petroleum continued for over a century. However, recent developments are bringing Diesel’s original concept back to the forefront.
Driven by concerns about oil dependence and a desire for cleaner energy sources, researchers and innovators are actively exploring alternative fuel options. Several promising advancements are gaining momentum:
1. **Biodiesel:** This alternative fuel is derived from fats or vegetable oils through a chemical process called transesterification. This process separates glycerin, creating biodiesel. Soybean oil is a common source, but even poultry fats can be utilized.
2. **Ethanol:** This clean-burning fuel, along with supportive government policies and rising gasoline prices, has spurred interest in biodiesel. Ethanol projects are underway, utilizing corn, softwood, and other sustainable sources.
3. **Multi-Fuel Engines:** Innovative research is focused on developing engines capable of running on various fuels, including hydrogen, ethanol, natural gas, propane, and digester gas from landfills. These engines are intended to replace less efficient models in generators, forklift trucks, airline ground equipment, irrigation pumps, tractors, and buses.
The Energy Policy Act of 2005 mandates increased renewable fuel usage, targeting 7.5 billion gallons by 2012. This legislation also provides crucial support to the alternative fuel industry through production incentives, such as tax credits, driving further innovation and adoption.