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United States Department of Agriculture (USDA) 2013


Biofuels Bioproducts

United States Department of Agriculture (USDA) Research, Education & Economics Information System (REEIS)


Identification : NEV0Miller

Pays : Etats Unis

Durée : Dec 1, 2013 à Nov 30, 2017

Domaine : Soil, Plant, Water, Nutrient Relationships ; Engineering Systems and Equipment ; Oilseed and oil crops, general/other ; Water resources


The major goals of this project are to : (1) Develop catalytic methods for conversion of extracts of grindelia squarrosa, a hydrocarbon-containing desert plant, to usable fuels or other bio-based products ; (2) develop methods for utilization of the extracted biomass, (3) determine the optimal methods for growing grindelia squarrosa on arid lands, and (4) determine the potential production yields of bio-based fuels and products from grindelia squarrosa.
The specific objectives include the following : 1. Develop green extraction and processing methods for both rabbitbrush and gumweed and characterize the remaining begass as to their potential for use as pelletized fuels. Examine the suitability of supercritical CO2 for extraction of grindelic acid and other terpenes from gumweed and rabbitbrush Characterize and pelletize the plant bagasse, and measure, via ultimate proximate analysis the cellulose, lignin, xylose, extractives, ash analysis by ICP. For each of two residues : Test ability to make durable, dense pellets, with and without wet torrefaction. Perform a technoeconomic analysis : For production of jet fuel and/or biodiesel gumweed and rabbitbrush, perform preliminary cost estimates to establish economic feasibility, to identify cost effective methods, and to guide future development. 2. Elucidate the catalytic reaction mechanisms and pathways of converting gumweed biocrude into hydrocarbon fuels using aqueous phase hydrotreating (APH) : Identify the fundamental catalytic reaction mechanisms and micro-kinetics underlying the APH process using grindelic acid model compounds as the probe reactants. Use the micro-kinetic model to divide the complex problem into functionally discrete tasks to aide in the design of catalysts ; Construct multi-functional APH catalysts designed to tune catalytic activity and selectivity at molecular-level for the production of hydrocarbon fuel components in jet fuel range from biocrude of gumweed ; Elucidate the dynamics of catalyst structure and surface coke formation relevant to catalyst stability in aqueous media and to design coke resistant catalysts ; Develop chemical analysis methods to quantitatively identify the reaction products in the APH process. 3. Develop suitable agronomic methods for efficient production of gumweed and rabbitbrush as a source of extractable terpenoids that can be converted to fuels, as well as improve methods for production of byproducts, particularly rubber and useful bioproducts : 1) Establish the relationship between water applications and biocrude production in field plot tests. 2) Determine optimum spacing for gumweed and rabbitbrush plants for biocrude production in field plot tests. 3) Determine storage stability of the biocrude contained in harvested crops using conventional baling methods 4) Refine pilot scale extraction methods to allow efficient and complete extraction of the biocrude using supercritical fluid extraction or minimal and recoverable solvents. 5) Screen wild collections of grindelia and rabbitbrush seeds to determine the variability of biocrude production, with selection of those strains that provide the highest biocrude/bioproduct content when grown under optimized conditions.

Présentation : USDA

Page publiée le 1er novembre 2015, mise à jour le 21 novembre 2017