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Materials Data on Pu(AlGa)2 by Materials Project

Pu(GaAl)2 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Pu is bonded in a 11-coordinate geometry to six equivalent Ga and seven Al atoms. There are four shorter (3.00 Å) and two longer (3.14 Å) Pu–Ga bond lengths. There are a spread of Pu–Al bond distances ranging from 3.05–3.14 Å. Ga is bonded in a 10-coordinate geometry to three equivalent Pu, three equivalent Ga, and four Al atoms. There are two shorter (2.60 Å) and one longer (2.76 Å) Ga–Ga bond lengths. There are a spread of Ga–Al bond distances ranging from 2.72–3.05 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded in a 9-coordinate geometry to three equivalent Pu, six equivalent Ga, and four equivalent Al atoms. All Al–Al bond lengths are 3.04 Å. In the second Al site, Al is bonded in a 12-coordinate geometry to four equivalent Pu, two equivalent Ga, and four equivalent Al atoms.

36 MATERIALS SCIENCE↗

Algal Biomass Conversion to Fuels via Combined Algae Processing (CAP) (2021 State of Technology and Future Research)

The annual State of Technology (SOT) assessment is an essential activity for platform research conducted under the Bioenergy Technologies Office. It allows for the impact of research progress to be quantified in terms of economic improvements in the overall biofuel production process for a particular biomass processing pathway, whether based on terrestrial or algal biomass feedstocks. As such, initial benchmarks can be established for currently demonstrated performance, and progress can be tracked towards out-year goals to ultimately demonstrate economically viable biofuel technologies. NREL's algae state of technology benchmarking efforts focus both on front-end algal biomass production and separately on back-end conversion to fuels through NREL's "combined algae processing" (CAP) pathway. The production model is based on outdoor long-term cultivation data, enabled by comprehensive algal biomass production trials conducted under the Development of Integrated Screening, Cultivar Optimization, and Verification Research consortium (DISCOVR) efforts, driven by data furnished by Arizona State University (ASU) at the Arizona Center for Algae Technology and Innovation (AzCATI) testbed site. The CAP model is based on experimental efforts conducted under NREL research and development projects. This report focuses on back-end conversion of algal biomass through the CAP pathway, highlighting the 2021 updates to minimum fuel selling price (MFSP). This update maintains an important recent inclusion of polyurethane (PU) previously incorporated in the 2020 SOT as a value-added coproduct. Relative to the 2020 SOT case, this indicates a minimal increase of $0.10-$0.14/GGE (roughly 2%) for both the acids and BDO pathways, attributed to minimal increases in upstream algal biomass costs from slightly lower demonstrated cultivation productivities in the 2021 SOT.

09 BIOMASS FUELS↗