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  1. Article ; Online: Direct Air Capture of CO

    Priyadarshini, Pranjali / Rim, Guanhe / Rosu, Cornelia / Song, MinGyu / Jones, Christopher W

    ACS environmental Au

    2023  Volume 3, Issue 5, Page(s) 295–307

    Abstract: ... Rising ... ...

    Abstract Rising CO
    Language English
    Publishing date 2023-06-29
    Publishing country United States
    Document type Journal Article
    ISSN 2694-2518
    ISSN (online) 2694-2518
    DOI 10.1021/acsenvironau.3c00010
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Cold Temperature Direct Air CO

    Wang, Yuxiang / Rim, Guanhe / Song, MinGyu / Holmes, Hannah E / Jones, Christopher W / Lively, Ryan P

    ACS applied materials & interfaces

    2023  Volume 16, Issue 1, Page(s) 1404–1415

    Abstract: Zeolites, silica-supported amines, and metal-organic frameworks (MOFs) have been demonstrated as promising adsorbents for direct air ... ...

    Abstract Zeolites, silica-supported amines, and metal-organic frameworks (MOFs) have been demonstrated as promising adsorbents for direct air CO
    Language English
    Publishing date 2023-12-18
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.3c13528
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Single-Walled Zeolitic Nanotubes: Advantaged Supports for Poly(ethylenimine) in CO

    Short, Gabriel N / Burentugs, Enerelt / Proaño, Laura / Moon, Hyun June / Rim, Guanhe / Nezam, Iman / Korde, Akshay / Nair, Sankar / Jones, Christopher W

    JACS Au

    2023  Volume 3, Issue 1, Page(s) 62–69

    Abstract: Previous research has demonstrated that amine polymers rich in primary and secondary amines supported on mesoporous substrates are effective, selective sorbent materials for removal of ... ...

    Abstract Previous research has demonstrated that amine polymers rich in primary and secondary amines supported on mesoporous substrates are effective, selective sorbent materials for removal of CO
    Language English
    Publishing date 2023-01-04
    Publishing country United States
    Document type Journal Article
    ISSN 2691-3704
    ISSN (online) 2691-3704
    DOI 10.1021/jacsau.2c00553
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO

    Rim, Guanhe / Priyadarshini, Pranjali / Song, MinGyu / Wang, Yuxiang / Bai, Andrew / Realff, Matthew J / Lively, Ryan P / Jones, Christopher W

    Journal of the American Chemical Society

    2023  Volume 145, Issue 13, Page(s) 7190–7204

    Abstract: A variety of amine-impregnated porous solid sorbents for direct air capture (DAC) of ... ...

    Abstract A variety of amine-impregnated porous solid sorbents for direct air capture (DAC) of CO
    Language English
    Publishing date 2023-03-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.2c12707
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  5. Article ; Online: Carbon capture in polymer-based electrolytes.

    Wang, Yang / Feric, Tony G / Tang, Jing / Fang, Chao / Hamilton, Sara T / Halat, David M / Wu, Bing / Celik, Hasan / Rim, Guanhe / DuBridge, Tara / Oshiro, Julianne / Wang, Rui / Park, Ah-Hyung Alissa / Reimer, Jeffrey A

    Science advances

    2024  Volume 10, Issue 16, Page(s) eadk2350

    Abstract: Nanoparticle organic hybrid materials (NOHMs) have been proposed as excellent electrolytes for combined ... ...

    Abstract Nanoparticle organic hybrid materials (NOHMs) have been proposed as excellent electrolytes for combined CO
    Language English
    Publishing date 2024-04-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.adk2350
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Cold-Temperature Capture of Carbon Dioxide with Water Coproduction from Air Using Commercial Zeolites

    Song, MinGyu / Rim, Guanhe / Kong, Fanhe / Priyadarshini, Pranjali / Rosu, Cornelia / Lively, Ryan P. / Jones, Christopher W.

    Industrial & engineering chemistry process design and development. 2022 Aug. 31, v. 61, no. 36

    2022  

    Abstract: The CO₂ sorption behavior of commercially available zeolites such as 3A, 4A, 5A, and 13X is considered at low temperatures for CO₂ removal from ambient air or direct air capture (DAC). Low silica zeolites are typically not effective CO₂ sorbents in the ... ...

    Abstract The CO₂ sorption behavior of commercially available zeolites such as 3A, 4A, 5A, and 13X is considered at low temperatures for CO₂ removal from ambient air or direct air capture (DAC). Low silica zeolites are typically not effective CO₂ sorbents in the presence of water, as they preferentially competitively adsorb water from humid gas streams, resulting in high sorbent regeneration costs. We hypothesize that low silica zeolites may function as efficient physisorbents for DAC if deployed at cold temperatures where the absolute humidity of air is low. Two modes of deployment of low silica zeolites for DAC at cold temperatures are explored here. Based on the CO₂ isotherms of the zeolites at −20 °C with different H₂O surface loadings, zeolite 5A was selected for evaluation in a competitive H₂O and CO₂ coadsorption process as the first mode of deployment. Despite the low absolute humidity at −20 °C compared to that at 25 °C, H₂O adsorption and accumulation result in a 39% decrease in the CO₂ adsorption capacity of 5A, rendering the process energetically expensive. In the second mode of deployment, focusing on estimates of the thermal energy requirements, zeolite 13X with silica gel as a desiccant in a two-stage, two-bed process is found to provide a potentially energetically feasible process (4359 MJ/tCO₂) for cold-temperature DAC. Cyclic adsorption and desorption cycles swinging between −20 and 200 °C with 0.04% and 99.9% CO₂, respectively, are conducted to experimentally support the thermal energy calculations using a temperature swing adsorption (TSA) process. Water production using available cooling energy from cold ambient air offers the potential to reduce the cost of DAC, as do additional process design modes such as vacuum swing adsorption and advanced heat management systems.
    Keywords absolute humidity ; adsorption ; air ; carbon dioxide ; cold ; desiccants ; desorption ; heat ; process design ; silica gel ; sorbents ; temperature ; thermal energy ; zeolites
    Language English
    Dates of publication 2022-0831
    Size p. 13624-13634.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 1484436-9
    ISSN 1520-5045 ; 0888-5885
    ISSN (online) 1520-5045
    ISSN 0888-5885
    DOI 10.1021/acs.iecr.2c02041
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks.

    Kim, Kwiyong / Candeago, Riccardo / Rim, Guanhe / Raymond, Darien / Park, Ah-Hyung Alissa / Su, Xiao

    iScience

    2021  Volume 24, Issue 5, Page(s) 102374

    Abstract: Critical minerals are essential for the ever-increasing urban and industrial activities in modern society. The shift to cost-efficient and ecofriendly urban mining can be an avenue to replace the traditional linear flow of virgin-mined materials. ... ...

    Abstract Critical minerals are essential for the ever-increasing urban and industrial activities in modern society. The shift to cost-efficient and ecofriendly urban mining can be an avenue to replace the traditional linear flow of virgin-mined materials. Electrochemical separation technologies provide a sustainable approach to metal recovery, through possible integration with renewable energy, the minimization of external chemical input, as well as reducing secondary pollution. In this review, recent advances in electrochemically mediated technologies for metal recovery are discussed, with a focus on rare earth elements and other key critical materials for the modern circular economy. Given the extreme heterogeneity of hydrometallurgically-derived media of complex feedstocks, we focus on the nature of molecular selectivity in various electrochemically assisted recovery techniques. Finally, we provide a perspective on the challenges and opportunities for process intensification in critical materials recycling, especially through combining electrochemical and hydrometallurgical separation steps.
    Language English
    Publishing date 2021-03-29
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2021.102374
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Sub-Ambient Temperature Direct Air Capture of CO

    Rim, Guanhe / Kong, Fanhe / Song, Mingyu / Rosu, Cornelia / Priyadarshini, Pranjali / Lively, Ryan P / Jones, Christopher W

    JACS Au

    2022  Volume 2, Issue 2, Page(s) 380–393

    Abstract: Due to the dramatically increased atmospheric ... ...

    Abstract Due to the dramatically increased atmospheric CO
    Language English
    Publishing date 2022-02-09
    Publishing country United States
    Document type Journal Article
    ISSN 2691-3704
    ISSN (online) 2691-3704
    DOI 10.1021/jacsau.1c00414
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: CO

    Rim, Guanhe / Roy, Noyonika / Zhao, Diandian / Kawashima, Shiho / Stallworth, Phillip / Greenbaum, Steven G / Park, Ah-Hyung Alissa

    Faraday discussions

    2021  Volume 230, Page(s) 187–212

    Abstract: Carbon mineralization to solid carbonates is one of the reaction pathways that can not only utilize captured CO2 but also potentially store it in the long term. In this study, the dissolution and carbonation behaviors of alkaline solid wastes (i.e., ... ...

    Abstract Carbon mineralization to solid carbonates is one of the reaction pathways that can not only utilize captured CO2 but also potentially store it in the long term. In this study, the dissolution and carbonation behaviors of alkaline solid wastes (i.e., waste concrete) was investigated. Concrete is one of the main contributors to a large carbon emission in the built environment. Thus, the upcycling of waste concrete via CO2 utilization has multifaceted environmental benefits including CO2 emission reduction, waste management and reduced mining. Unlike natural silicate minerals such as olivine and serpentine, alkaline solid wastes including waste concrete are highly reactive, and thus, their dissolution and carbonation behaviors vary significantly. Here, both conventional acid (e.g., hydrochloric acid) and less studied carbonic acid (i.e., CO2 saturated water) solvent systems were explored to extract Ca from concrete. Non-stoichiometric dissolution behaviors between Ca and Si were confirmed under far-from-equilibrium conditions (0.1 wt% slurry density), and the re-precipitation of the extracted Si was observed at near-equilibrium conditions (5 wt% slurry density), when the Ca extraction was performed at a controlled pH of 3. These experiments, with a wide range of slurry densities, provided valuable insight into Si re-precipitation phenomena and its effect on the mass transfer limitation during concrete dissolution. Next, the use of the partial pressure of CO2 for the pH swing carbon mineralization process was investigated for concrete, and the results were compared to those of Mg-bearing silicate minerals. In the PCO2 swing process, the extraction of Ca was significantly limited by the precipitation of the carbonate phase (i.e., calcite), since CO2 bubbling could not provide a low enough pH condition for concrete-water-CO2 systems. Thus, this study showed that the two-step carbon mineralization via PCO2 swing, that has been developed for Mg-bearing silicate minerals, may not be viable for highly reactive Ca-bearing silicate materials (e.g., concrete). The precipitated calcium carbonate (PCC) derived from waste concrete via a pH swing process showed very promising results with a high CO2 utilization potential as an upcycled construction material.
    Language English
    Publishing date 2021-05-26
    Publishing country England
    Document type Journal Article
    ISSN 1364-5498
    ISSN (online) 1364-5498
    DOI 10.1039/d1fd00022e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Bubbling to turbulent bed regime transition of ternary particles in a gas–solid fluidized bed

    Rim, GuanHe / DongHyun Lee

    Powder technology. 2016 Mar., v. 290

    2016  

    Abstract: The transition from bubbling to turbulent flow regime of a wide particle size distribution (PSD) powder was investigated in a circulating fluidized bed riser with an internal diameter and a height of 0.1 and 3.7m, respectively. Iron ore and limestone ... ...

    Abstract The transition from bubbling to turbulent flow regime of a wide particle size distribution (PSD) powder was investigated in a circulating fluidized bed riser with an internal diameter and a height of 0.1 and 3.7m, respectively. Iron ore and limestone particles were used as the wide PSD powder. To study the effect of particle size distribution on the flow regime transition, five types of mono size glass bead were used. Binary and ternary mixtures were made from the mixture of mono size glass beads. The regime transition of the wide PSD powder was studied by means of overall pressure drop and pressure fluctuation analysis. By gradually increasing the superficial gas velocity, a bed of a wide PSD powder changed from a fixed bed state to partial fluidization and then to complete fluidization. The transition from bubbling to turbulent fluidization occurred in the complete fluidization state. The effects of fine particle concentration, coarse particle size, and particle size distribution on bubbling-to-turbulent regime transition velocity were also studied. A correlation expressed in terms of Rec, Ar, and standard deviation of particle size distribution (σp) was proposed to predict the transition velocity (Uc). The predicted Uc values were in close agreement with the experimental data of mono, binary, and ternary mixtures.
    Keywords fluidized beds ; glass ; limestone ; particle size ; particle size distribution ; powders ; statistical analysis ; turbulent flow
    Language English
    Dates of publication 2016-03
    Size p. 45-52.
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 0032-5910
    DOI 10.1016/j.powtec.2015.12.032
    Database NAL-Catalogue (AGRICOLA)

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