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.
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. …
Desert Shrub, Guayule, May Be Fuel Of The Future
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