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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Co(BW)2 by Materials Project

W2CoB2 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. W2+ is bonded in a 6-coordinate geometry to six equivalent B3- atoms. There are four shorter (2.34 Å) and two longer (2.52 Å) W–B bond lengths. Co2+ is bonded in a square co-planar geometry to four equivalent B3- atoms. All Co–B bond lengths are 2.09 Å. B3- is bonded in a 9-coordinate geometry to six equivalent W2+, two equivalent Co2+, and one B3- atom. The B–B bond length is 1.88 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(BW)2 by Materials Project

Ni(WB)2 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. W2+ is bonded in a 6-coordinate geometry to six equivalent B3- atoms. There are four shorter (2.33 Å) and two longer (2.54 Å) W–B bond lengths. Ni2+ is bonded in a square co-planar geometry to four equivalent B3- atoms. All Ni–B bond lengths are 2.10 Å. B3- is bonded in a 9-coordinate geometry to six equivalent W2+, two equivalent Ni2+, and one B3- atom. The B–B bond length is 1.86 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Fe(BW)2 by Materials Project

Fe(WB)2 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. W2+ is bonded in a 6-coordinate geometry to six equivalent B3- atoms. There are four shorter (2.35 Å) and two longer (2.52 Å) W–B bond lengths. Fe2+ is bonded in a square co-planar geometry to four equivalent B3- atoms. All Fe–B bond lengths are 2.08 Å. B3- is bonded in a 9-coordinate geometry to six equivalent W2+, two equivalent Fe2+, and one B3- atom. The B–B bond length is 1.88 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mn(BW)2 by Materials Project

Mn(WB)2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. W2+ is bonded in a distorted hexagonal planar geometry to six equivalent B3- atoms. There are two shorter (2.34 Å) and four longer (2.35 Å) W–B bond lengths. Mn2+ is bonded in a square co-planar geometry to four equivalent B3- atoms. All Mn–B bond lengths are 2.34 Å. B3- is bonded in a 9-coordinate geometry to six equivalent W2+, two equivalent Mn2+, and one B3- atom. The B–B bond length is 1.87 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Fe(BW)2 by Materials Project

Fe(WB)2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. W2+ is bonded in a distorted hexagonal planar geometry to six equivalent B3- atoms. There are two shorter (2.32 Å) and four longer (2.35 Å) W–B bond lengths. Fe2+ is bonded in a square co-planar geometry to four equivalent B3- atoms. All Fe–B bond lengths are 2.28 Å. B3- is bonded in a 9-coordinate geometry to six equivalent W2+, two equivalent Fe2+, and one B3- atom. The B–B bond length is 1.86 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2025

Hythane production from brewery wastewater‐generated biogas using a membrane electrochemical cell

Converting organic wastes into hythane, a blend of hydrogen (5% to 25%) and methane (75% to 95%), will not only reduce waste discharge but also maximize energy recovery. Herein, a membrane electrochemical cell was investigated to produce hythane from biogas generated in anaerobic digestion of brewery wastewater (BW). The key parameters including current densities, electrolyte concentrations, and biogas flow rates were examined in batch tests. Under an optimal condition (210 mA, 100 mM electrolyte, 1 mL min −1 of biogas flow), the system achieved the production of hythane containing 70.6% ± 1.1% CH 4 , 27.3% ± 0.5% H 2 , and 2.1% ± 1.6% CO 2 (corresponding to 91.1% ± 6.4% CO 2 removal). Meanwhile, the H 2 S concentration was decreased from 513 to 2 ppm, 99.9% ± 0.2% removal. Energy efficiency of this system was estimated 61.8% ± 10.7%, and energy output increased by 54.4% ± 10.6% with biogas upgrading to hythane. Furthermore, these results encourage further exploration of electrochemical approach for simultaneous biogas upgrading and hythane production.

Rao, Yue [Washington University in St. Louis, MO (↗