Yellow Diesel B.V. recently reported that they have succeeded in producing high-quality bio-diesel in a continuous fixed-bed micro plant based on heterogeneous catalysis. This process gives pure bio-diesel plus a cosmetics/food grade glycerol, with practically no waste streams. The bio-diesel specifications are better than required by the European norm EN14214. The Yellow Diesel process eliminates all the aqueous waste streams that stem from using the conventional homogeneous acid/base catalyst technology. Thanks to the novel catalyst and integrated process design, the process saves up to 40% of the capital costs and 30% of the operating costs compared to a conventional plant. Yellow Diesel has produced the bio-diesel in its continuous micro plant, and is now scaling up the process to pilot-scale.
Importantly, this process can be adjusted to various types of feedstock, including low-quality oils, waste oils and fats. The following sample shows the quality specifications of the biodiesel made from industrial-grade rapeseed oil, as determined by the independent laboratory NofaLab.
Analysis results Yellow Diesel EN14214
Ester content 99.5% >96.5%
Density at 15 C 0.8740 0.860-0.900
Flash point >120 C >120 C
Methanol content 0.02% <0.2%
Monoglyceride 0.57% <0.8%
Diglyceride 0.19% <0.2%
Triglyceride 0.15% <0.2%
Source: www.Yellowdiesel.com
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