Efficiency

BamCore aims to transition its bamboo/wood hybrid dual panel hollow wall system to primarily bamboo content to develop a prefabricated, building code-compliant vertical framing wall system for constructing carbon-negative low- and mid-rise buildings.

The University of Nevada, Reno, aims to develop a new beneficiation process for energy efficient comminution and separation of rare earth elements (REEs) from domestic sources. The team will develop and test an accelerated reactive carbonation process integrated with ore sorting and high-pressure grinding rolls to enable improved mineral liberation, energy-efficient comminution (grinding), and enhanced separation of rare earth elements from low-grade bastnaesite-bearing ores.

Harvard University (Harvard) aims to advance nuclear magnetic resonance (NMR) techniques for CO2 reactive rocks to better determine carbonation potential and storage capacity by quantifying CO2 pore filling saturation based on pore size distribution and in-situ wettability. Mineralization reactions occur only in pores occupied by CO2; thus, understanding CO2 transport and distribution in rock porosities is key to efficient mineralization and sequestration.

Johns Hopkins University (JHU) will develop sustainable mining of critical elements from gangue minerals. The concept is based on the electrosynthesis of hydrochloric acid or HCl and base (sodium hydroxide or NaOH) via salt splitting and using renewable electricity as the power source. JHU will use the produced HCl to leach targeted metals from low-grade minerals and NaOH to react with CO2 and generate sodium carbonate (Na2CO3).

The National Renewable Energy Laboratory (NREL) and partners will use bio-derived supplementary cementitious materials and concrete additives generated from low-value byproducts created during sustainable aviation fuel production to develop a carbon-negative, thermally insulating concrete. The team proposes that activated carbon, aerogels, and ash produced from biomass processing, as well as supplemental CO2 adsorption to these materials, can replace a large portion of ordinary portland cement in common concrete ready mix.

Clemson University will develop a mass timber floor system alternative for greenhouse gas-intensive floor and ceiling materials, which account for up to 75% of embodied energy in traditional building designs. Mass timber products are comprised of thick, compressed layers of wood and used to create strong, structural load-bearing elements. The proposed system will address the entire building life cycle, from design and construction, through occupancy and operation, and contribute toward closing the gap between observed and theoretical service lifetimes.

Oregon State University will develop C3, a cellulose cement composite, for use in residential and light commercial construction as an alternative to dimensional lumber and sheet products. C3 consists of cellulose excelsior (wood wool), cellulose nano material (CNM), and low carbon cement binders. The team will create C3 from small-diameter logs and branches that are unsuitable for lumber production. Removing small diameter wood from the forest as a potential fuel source can help lessen wildfires.

Columbia University (Columbia) will use innovative processes to enable increased domestic production of energy-relevant metals from CO2-reactive minerals at potentially lower costs than the state of the art. The work will focus on feedstocks from the Tamarack Project, leading to domestic production of nickel, copper, and cobalt and smaller amounts of platinum, palladium, and gold. Activities will leverage Columbia’s hydrometallurgical leach technologies for these minerals.

The National Renewable Energy Laboratory (NREL) will develop a cost-effective, easy-to-fabricate bio-based insulation from celium (a cellulose-mycelium composite) to reduce the embodied and operational CO2 footprint of new and retrofitted residential housing. NREL will create celium by valorizing cellulose with mycelium, the root network of fungi, to create a new class of high-performing, carbon-capturing and -storing textiles, foams, and composites. The team will fabricate a net CO2 negative celium material with high-performance thermal, acoustic, and antimicrobial properties.

Purdue University will harness microbial activities to reinforce the load-bearing structure of wood to the strength of steel, increase its fire resistance and lifetime, and lower technological barriers to manufacturing uniform wood composite materials. The “living wood” has a self-healing capability that breathes in CO2 and produces biomaterials to fill up and bond possible cracks. The process is intrinsically scalable and cost-effective due to the bulk treatment of wood and exponential manufacturing of microbes.