17.17. Future

According to the IEA perspectives, the share of renewables is expected to increase in the coming years. Biodiesel is a well-known technology and the production potential of installed plants is largely underexploited. So it seems reasonable to presume that biodiesel production will still keep growing in the near future. However, competition for feedstock supply, development of new technologies (i.e., green diesel), and concerns about biodiesel degradability and long-term effects on engines have also to be taken into consideration.
In the following section, the author reflects three options that may contribute to the future of biodiesel industry.

17.17.1. Conversion of Biodiesel–Derived Crude Glycerol to n-Butanol

Khanna et al. [166] ...

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