In many countries, blending biodiesel with fossil diesel is mandatory. The green fuel is biodegradable, non-toxic, poses no threat to drinking water and can be used in existing diesel engines. As a result, fewer greenhouse gases and soot are emitted, which significantly improves the energy balance. In addition, biodiesel is not a hazardous material, which makes it easier to transport, store and handle. Biodiesel is characterized by excellent lubricity and is also gentle on the vehicle engine.
The key benefits of biodiesel at a glance
- Reduced CO2 emissions up to 67%
- Reduces greenhouse gases by up to 86% over the entire life cycle
- Lower soot amounts in exhaust gas
- Biodiesel is not a hazardous material
- Biodiesel is biodegradable
- Less energy requirement and lower costs through transesterification
Our alkoxide product portfolio is tailored to the special requirements of the manufacture and use of modern, high-tech fuel. We offer:
- Alkoxides as catalysts for efficient transesterification
- Anti-foaming agents for effective use of biodiesel blends
- Flow improvers for outstanding low-temperature properties in all regions in all seasons
- Special polyamide 12 for special, durable automotive components
- Process engineering consulting
FROM NATIVE OIL TO HIGH-TECH Biodiesel
Due to their molecular structure, vegetable oils are not suitable for use as fuel in conventional diesel engines. Vegetable and animal fats consist of triglycerides, that is, the combination of the trivalent alcohol glycerol with three fatty acids. If the glycerol is replaced with methanol, the viscous vegetable oil is transformed into a fuel with excellent flow characteristics: biodiesel.
And all it takes is a simple chemical reaction called transesterification, which involves mixing methanol with a small quantity of an alkaline catalyst which provides cost savings and performance and selectivity that provides a good biodiesel yield. The most effective catalysts are the metal alkoxide catalyst sodium methylate in the form of a 30% solution in methanol (NM 30) and potassium methylate in the form of a 32% solution in methanol (KM 32), both from Evonik.
In addition to the main product, biodiesel, transesterification also yields glycerol as a valuable byproduct.
Application / Requirements of Raw Materials
Both catalysts can be used in anhydrous production processes in a closed circuit directly from the storage tank without any additional intermediary steps. This reduces the risks associated with handling alkoxides to an absolute minimum.