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1. Mixed plastics waste valorization through tandem chemical oxidation and biological funneling

Author

Department of Energy (US), Advanced Manufacturing Office (US), Bioenergy Technologies Office (US), National Renewable Energy Laboratory (US), Sullivan, Kevin P. [0000-0003-3324-1145], Werner, Allison Z. [0000-0001-7147-2863], Ellis, Lucas D. [0000-0001-6026-1825, Black, Brenna A. [0000-0003-0035-7942], Brandner, David G. [0000-0003-4296-4855], Bratti, Felicia [0000-0003-2381-953X], Buss, Bonnie L. [0000-0001-7977-0670], Dong, Xueming [0000-0001-8726-7565], Haugen, Stefan J. [0000-0003-3999-0796], Ingraham, Morgan A. [0000-0002-7350-4862], Michener, William E. [0000-0001-6023-7286], Miscall, Joel [0000-0002-4513-8703], Pardo, Isabel [0000-0002-8568-1559], Guss, Adam M. [0000-0001-5823-5329], Román-Leshkov, Yuriy [0000-0002-0025-4233], Beckham, Gregg T. [0000-0002-3480-212X], Sullivan, Kevin P., Werner, Allison Z., Ramirez, Kelsey J., Ellis, Lucas D., Bussard, Jeremy R., Black, Brenna A., Brandner, David G., Bratti, Felicia, Buss, Bonnie L., Dong, Xueming, Haugen, Stefan J., Ingraham, Morgan A., Konev, Mikhail O., Michener, William E., Miscall, Joel, Pardo, Isabel, Woodworth, Sean P., Guss, Adam M., Román-Leshkov, Yuriy, Stahl, Shannon S., Beckham, Gregg T., Department of Energy (US), Advanced Manufacturing Office (US), Bioenergy Technologies Office (US), National Renewable Energy Laboratory (US), Sullivan, Kevin P. [0000-0003-3324-1145], Werner, Allison Z. [0000-0001-7147-2863], Ellis, Lucas D. [0000-0001-6026-1825, Black, Brenna A. [0000-0003-0035-7942], Brandner, David G. [0000-0003-4296-4855], Bratti, Felicia [0000-0003-2381-953X], Buss, Bonnie L. [0000-0001-7977-0670], Dong, Xueming [0000-0001-8726-7565], Haugen, Stefan J. [0000-0003-3999-0796], Ingraham, Morgan A. [0000-0002-7350-4862], Michener, William E. [0000-0001-6023-7286], Miscall, Joel [0000-0002-4513-8703], Pardo, Isabel [0000-0002-8568-1559], Guss, Adam M. [0000-0001-5823-5329], Román-Leshkov, Yuriy [0000-0002-0025-4233], Beckham, Gregg T. [0000-0002-3480-212X], Sullivan, Kevin P., Werner, Allison Z., Ramirez, Kelsey J., Ellis, Lucas D., Bussard, Jeremy R., Black, Brenna A., Brandner, David G., Bratti, Felicia, Buss, Bonnie L., Dong, Xueming, Haugen, Stefan J., Ingraham, Morgan A., Konev, Mikhail O., Michener, William E., Miscall, Joel, Pardo, Isabel, Woodworth, Sean P., Guss, Adam M., Román-Leshkov, Yuriy, Stahl, Shannon S., and Beckham, Gregg T.

Abstract

Mixed plastics waste represents an abundant and largely untapped feedstock for the production of valuable products. The chemical diversity and complexity of thesematerials, however, present major barriers to realizing this opportunity. In this work, we show that metal-catalyzed autoxidation depolymerizes comingled polymers into a mixture of oxygenated small molecules that are advantaged substrates for biological conversion. We engineer a robust soil bacterium, Pseudomonas putida, to funnel these oxygenated compounds into a single exemplary chemical product, either b-ketoadipate or polyhydroxyalkanoates. This hybrid process establishes a strategy for the selective conversion of mixed plastics waste into useful chemical products.

Published
2022

2. Mixed plastics waste valorization through tandem chemical oxidation and biological funneling

Author

Kevin P. Sullivan, Allison Z. Werner, Kelsey J. Ramirez, Lucas D. Ellis, Jeremy R. Bussard, Brenna A. Black, David G. Brandner, Felicia Bratti, Bonnie L. Buss, Xueming Dong, Stefan J. Haugen, Morgan A. Ingraham, Mikhail O. Konev, William E. Michener, Joel Miscall, Isabel Pardo, Sean P. Woodworth, Adam M. Guss, Yuriy Román-Leshkov, Shannon S. Stahl, Gregg T. Beckham, Department of Energy (US), Advanced Manufacturing Office (US), Bioenergy Technologies Office (US), National Renewable Energy Laboratory (US), Sullivan, Kevin P. [0000-0003-3324-1145], Werner, Allison Z. [0000-0001-7147-2863], Ellis, Lucas D. [0000-0001-6026-1825, Black, Brenna A. [0000-0003-0035-7942], Brandner, David G. [0000-0003-4296-4855], Bratti, Felicia [0000-0003-2381-953X], Buss, Bonnie L. [0000-0001-7977-0670], Dong, Xueming [0000-0001-8726-7565], Haugen, Stefan J. [0000-0003-3999-0796], Ingraham, Morgan A. [0000-0002-7350-4862], Michener, William E. [0000-0001-6023-7286], Miscall, Joel [0000-0002-4513-8703], Pardo, Isabel [0000-0002-8568-1559], Guss, Adam M. [0000-0001-5823-5329], Román-Leshkov, Yuriy [0000-0002-0025-4233], Beckham, Gregg T. [0000-0002-3480-212X], Sullivan, Kevin P., Werner, Allison Z., Ellis, Lucas D., Black, Brenna A., Brandner, David G., Bratti, Felicia, Buss, Bonnie L., Dong, Xueming, Haugen, Stefan J., Ingraham, Morgan A., Michener, William E., Miscall, Joel, Pardo, Isabel, Guss, Adam M., Román-Leshkov, Yuriy, and Beckham, Gregg T.

Subjects
Soil, Multidisciplinary, Pseudomonas putida, Polyhydroxyalkanoates, Oxidation-Reduction, Plastics
Abstract

115 p.-4 fig.-45 fig. supl.-14 tab supl., Mixed plastics waste represents an abundant and largely untapped feedstock for the production of valuable products. The chemical diversity and complexity of thesematerials, however, present major barriers to realizing this opportunity. In this work, we show that metal-catalyzed autoxidation depolymerizes comingled polymers into a mixture of oxygenated small molecules that are advantaged substrates for biological conversion. We engineer a robust soil bacterium, Pseudomonas putida, to funnel these oxygenated compounds into a single exemplary chemical product, either b-ketoadipate or polyhydroxyalkanoates. This hybrid process establishes a strategy for the selective conversion of mixed plastics waste into useful chemical products., Funding was provided by the US Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office (AMO), and Bioenergy Technologies Office (BETO). This work was performed as part of the BOTTLE Consortium and was supported by AMO and BETO under contract no. DE-AC36- 08GO28308 with the National Renewable Energy Laboratory (NREL),operated by the Alliance for Sustainable Energy, LLC. The BOTTLE Consortium includes members from MIT, funded under contract no. DE-AC36-08GO28308 with NREL. Contributions by S.S.S. were supported by the US Department of Energy, Office of Basic Energy Sciences, under award no. DEFG02-05ER15690.

Published
2022
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3. Gibbs Energy Minimization Model for Solvent Extraction with Application to Rare-Earths Recovery.

Author

Iloeje CO, Jové Colón CF, Cresko J, and Graziano DJ

Subjects
Recycling, Solvents, Metals, Rare Earth, Research Design
Abstract

The emergence of technologies in which rare-earth elements provide critical functionality has increased the demand for these materials, with important implications for supply security. Recycling provides an option for mitigating supply risk and for creating economic value from the resale of recovered materials. While solvent extraction is a proven technology for rare-earth recovery and separation, its application often requires extensive trial-and-error experimentation to estimate parameter values and determine experimental design configurations. We describe a modeling strategy based on Gibbs energy minimization that incorporates parameter estimation for required thermodynamic properties as well as process design for solvent extraction and illustrate its applicability to rare earths separation. Visualization analysis during parameter estimation revealed a linear relationship between the standard enthalpies of the extractant and respective organo-metal complexes, analogous to the additivity principle for predicting molar volumes of organic compounds. Establishing this relationship reduced the size of the parameter estimation problem and yielded good agreement between model predictions and reported equilibrium extraction data, validating the property estimates for the organic phase species. Design exploration and optimization results map the space of feasible solvent extraction column configurations and identify the set of optimal design parameter values that meet recovery and purity targets.

Published
2019
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