Biofuels: the right crop at the right place

Washington, USA — Washington State University researchers have found a way to make jet fuel from a common black fungus found in decaying leaves, soil and rotting fruit. The researchers hope the process leads to economically viable production of aviation biofuels in the next five years.

To increase production of biofuels from crops, such as corn and wheat, natural areas need to make way for agricultural land. The initial result of this is an increase in greenhouse gas emission. Using a global model, Pieter Elshout and fellow environmental scientists at Radboud University have demonstrated how long it takes for the advantages that biofuels offer over fossil fuels to earn a return on this initial emission. On the global scale, the average payback time for greenhouse gases is nineteen years.

From Western Europe to the tropics
Elshout, a PhD candidate at Radboud University, explains: “Nineteen years sounds like a long time, but in farming terms, it’s not all that long. Furthermore, that figure is a global average. In Western Europe, that period is considerably shorter, sometimes spanning just a few years. In the tropics, however, it can extend past a hundred years.” The model demonstrates that the location of biofuel crops has a significant impact on greenhouse gas emission – more so than does the type of crop or crop management (i.e. the amount of fertilizers and irrigation used).

First global-scale model
“Our model,” Elshout continues, “is the first that offers a global, spatially-explicit overview of biogenic gas emission resulting from crops used to produce biofuels. In developing this model, our calculations of the durations of payback times took account of the entire production chain for fossil fuels and biofuels with the accompanying greenhouse emissions.” This global model is applicable to first-generation biofuels. These include bioethanol from corn, wheat and sugar cane, as well as biodiesel from soybeans and rapeseed.

Food for discussion
These results will contribute an angle of nuance to the current debate on biofuels in the Netherlands. In a follow-up study on biofuel crop farming, Elshout and his colleagues hope to investigate the payback times related to the impact on biodiversity. ’

About Radboud University

Radboud University is a broad, international oriented university that aspires to be one of the best in Europe. Together with Radboudumc, we have created an intellectual environment that inspires and challenges our students and staff so that they can extend the scope of academic disciplines and benefit society.

Radboud University challenges its students to actively participate in the academic community and trains them to be critical and committed academics, with their own views regarding scholarship and society, who will take up responsible positions in a society which is becoming increasingly internationalised.

The university’s academic staff come from all over the world, and a large proportion of our student population has spent at least some months studying at a university abroad.

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