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Desert Shrub, Guayule, May Be Fuel Of The Future

Date:
March 7, 2009
Source:
USDA/Agricultural Research Service
Summary:
Superb natural latex from a desert shrub called guayule (why-YOU-lee) makes high-quality gloves, medical devices, and other in-demand natural rubber products. But guayule may also prove to be an economical, environmentally friendly source of another valuable resource--energy.

ARS research chemist Colleen McMahan is studying guayule, a native desert plant that could be farmed as a domestic source of bioenergy as well as high-quality latex.
Credit: Photo by Peggy Greb

Superb natural latex from a desert shrub called guayule (why-YOU-lee) makes high-quality gloves, medical devices, and other in-demand natural rubber products.

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But guayule may also prove to be an economical, environmentally friendly source of another valuable resource—energy. That's according to Agricultural Research Service (ARS) chemist Colleen M. McMahan at the agency's Western Regional Research Center in Albany, Calif.

Bioenergy can be made from ground-up guayule stems and branches, left after their white, rubber-rich latex has been removed, McMahan noted. The leftovers—a soft, light brown sawdust-like material called bagasse—provide 8,000 to 9,000 Btu per pound, about the same as charcoal.

McMahan's collaborators include ARS chemist Kevin M. Holtman at the Albany center, who has already made small amounts of ethanol from guayule, and chemical engineer Akwasi Boateng at the ARS Eastern Regional Research Center in Wyndmoor, Pa. Boateng is looking into converting guayule bagasse into bio-oil or synthetic gas.

Guayule offers many biofuel benefits. It isn't a food or feed crop, so using it for energy production won't compete with those uses. Guayule shrubs can be harvested for the first time as early as two years after planting, and are ready to harvest again in about another year and a half.

Guayule's bagasse and latex are available year round. The only other biofuel feedstock available continuously right now is garbage (municipal solid waste).

In addition, guayule thrives in hot, dry ecosystems where many other biofuel crops wouldn't grow well. The hardy shrub requires less fertilizer than other crops currently produced in the desert Southwest. Even though a few herbicides are needed while the plants are getting established, once that happens, there's no need for more—or for chemicals that target harmful insects, fungi, or worms called nematodes.


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "Desert Shrub, Guayule, May Be Fuel Of The Future." ScienceDaily. ScienceDaily, 7 March 2009. <www.sciencedaily.com/releases/2009/02/090220183706.htm>.
USDA/Agricultural Research Service. (2009, March 7). Desert Shrub, Guayule, May Be Fuel Of The Future. ScienceDaily. Retrieved December 18, 2014 from www.sciencedaily.com/releases/2009/02/090220183706.htm
USDA/Agricultural Research Service. "Desert Shrub, Guayule, May Be Fuel Of The Future." ScienceDaily. www.sciencedaily.com/releases/2009/02/090220183706.htm (accessed December 18, 2014).

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