Compatibility of polymers in super-critical carbon dioxide for power generation systems: High level findings for low temperatures and pressure conditions

Menon, Nalini; Walker, Mathew; Anderson, Mark; Colgan, Nathan

doi:10.2172/1592964

Cited by 4 publications

(3 citation statements)

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“…In summary, the FFKM, FKM, FEPM, and HNBR also meet the acceptance criteria of ISO 23936‐2 in modulus. These findings are aligned with the reported data in the literature which obtained the changes in FFKM (FF202–90) after exposure to sCO 2 at 20 MPa and 100°C up to 1000 h 12 . The same study showed a slight increase in the storage modulus and the glass transition temperature with the time of exposure.…”

Section: Resultssupporting

confidence: 92%

“…11 Menon et al, recently studied the compatibility of polymers in sCO 2 . 12 The polymers such as FFKM, Viton ® , ethylene propylene diene monomer (EPDM), Neoprene ® , ethylene propylene rubber (EPR), acrylonitrile butadiene rubber (Buna-N), polytetrafluoroethylene (PTFE), polyether ether ketone (PEEK), and Nylon ® were exposed to 20 MPa of sCO 2 pressure at 100 and 150 C for 1000 h. The test samples were withdrawn after 200 h and at the end of the soak test and characterized for their physical and chemical changes. The thermoplastic polymer was found to experience fewer sCO 2 effects than elastomers.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of elastomer suitability for CCUS: Chemical compatibility and rapid gas decompression in supercritical CO₂

Yun,

Zolfaghari,

Marya

2024

J of Applied Polymer Sci

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The equipment of carbon capture, utilization, and sequestration (CCUS) infrastructure demands a range of elastomers fully compatible with CO2 phases. In this paper, the typical oilfield elastomers, perfluoroelastomer (FFKM), fluoroelastomer (FKM), tetrafluoroethylene propylene elastomer (FEPM), and hydrogenated nitrile butadiene rubber (HNBR), were studied for their chemical compatibility and rapid gas decompression (RGD) in 100% supercritical carbon dioxide (sCO2). At a given test condition, all selected oilfield compounds passed the ISO 23936‐2 acceptance compatibility criteria after 28‐day aging at 100 C and 34.5 MPa in sCO2. After aging, the elongations at break of the FFKM and FEPM compounds increased; tensile strength for FEPM decreased. In contrast to FFKM and FEPM, FKM and HNBR exhibited both lower elongations at break and lower tensile strengths. The moduli of the various elastomers consistently decreased after the sCO2 aging. The RGD testing revealed that all compounds were capable of passing the RGD ISO 23936‐2 criteria. Complementary material analyses by Fourier transform infrared spectroscopy and differential scanning calorimetry along with surface morphology analyses were also conducted to gain additional insight into the suitability of the selected elastomers for sCO2 service.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Evaluation of elastomer suitability for CCUS: Chemical compatibility and rapid gas decompression in supercritical CO₂

Yun,

Zolfaghari,

Marya

2024

J of Applied Polymer Sci

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“…This technique is particularly used to remove any kind of molecular residues, especially organic contamination such as cutting oils, hydrocarbons, undesired compounds…with thus a high degreasing and extraction power (as an example, the removal of trichloroanisole present in cork and responsible for cork taste is performed via supercritical CO2). Nevertheless, this technique is poorly compatible with elastomeric materials [6]. Due to the use in a closed vessel, this limits the size of the parts to be cleaned.…”

Section: Supercritical Co2 Cleaningmentioning

confidence: 99%

Evaluation of advanced cleaning processes for sensitive surfaces in optical instrumentation

Cheung¹,

Faye

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Contamination has become a major issue in all high-tech industries, with increasingly stringent cleanliness requirements. It is the case for sensitive parts of space flight hardware, such as optics or other embedded equipment for which surface cleanliness is a critical topic, since even a thin layer of contaminant can adversely affect performance. Sometimes, cleaning may be needed to reach a specified cleanliness surface level at different integration phases of instrument or satellite, or as a corrective action in case of anomaly. Thus it is recommended to consider cleaning techniques without direct contact with the sensitive or fragile surface to prevent any damage after treatment. Five processes or techniques among those described for instance in the ECSS standard dedicated to ultracleaning of flight hardware (laser, vacuum bakeout, carbon dioxide (CO2) snow, supercritical CO2 and plasma) have been chosen for a test campaign to assess their efficacy on representative samples of sensitive optical parts (e.g.: glasses, mirrors, treatments, coatings, etc.). The study has been focused on the removal of molecular residues from substrates intentionally contaminated by a mixture of typical chemical contaminants. After a description of the selected cleaning techniques and their pros and cons, this paper will present the methodology adopted for the process validation using analytical chemistry and the comparative results of the performance of each cleaning technique. The impact on materials and the ease of implementation have been evaluated as well. In fine, the objective of this study is to provide some guidance to choose one or several non-contact processes suitable for cleaning sensitive space hardware, in order to guarantee contamination-free surfaces before flight and limit any risk of failure.

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A novel in-situ Raman spectroscopic cell for aqueous geochemistry at the solid–liquid interface

Alcorn

Neil

2023

Review of Scientific Instruments

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In-situ Raman spectroscopy has the potential to be a powerful technique for monitoring geochemical reactions at a solid–liquid interface in real time. In this article, we present the development and testing of an in-situ Raman spectroscopic cell, which can be used for reaction systems at moderate temperatures and pressure [<1000 psi (6.89 MPa), <100 °C, relevant to subsurface geologic systems] and can hold samples large enough for chemical mapping of heterogeneous rock surfaces. The system is validated by measuring the temperature-dependent conversion of gypsum to calcite over time. Near total conversion of gypsum to calcite on the mineral surface took 29 hours at room temperature and 150 minutes at 100 °C, corresponding to an 11.6-fold increase in the conversion rate. We anticipate that this cell can be an important tool in quantifying the rates of carbon mineralization relevant to geologic carbon sequestration, particularly for the elevated rates recently observed in mafic/ultramafic rocks.

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Compatibility of polymers in super-critical carbon dioxide for power generation systems: High level findings for low temperatures and pressure conditions

Cited by 4 publications

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Evaluation of elastomer suitability for CCUS: Chemical compatibility and rapid gas decompression in supercritical CO₂

Evaluation of elastomer suitability for CCUS: Chemical compatibility and rapid gas decompression in supercritical CO₂

Evaluation of advanced cleaning processes for sensitive surfaces in optical instrumentation

A novel in-situ Raman spectroscopic cell for aqueous geochemistry at the solid–liquid interface

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Compatibility of polymers in super-critical carbon dioxide for power generation systems: High level findings for low temperatures and pressure conditions

Cited by 4 publications

References 0 publications

Evaluation of elastomer suitability for CCUS: Chemical compatibility and rapid gas decompression in supercritical CO2

Evaluation of elastomer suitability for CCUS: Chemical compatibility and rapid gas decompression in supercritical CO2

Evaluation of advanced cleaning processes for sensitive surfaces in optical instrumentation

A novel in-situ Raman spectroscopic cell for aqueous geochemistry at the solid–liquid interface

Contact Info

Product

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Evaluation of elastomer suitability for CCUS: Chemical compatibility and rapid gas decompression in supercritical CO₂

Evaluation of elastomer suitability for CCUS: Chemical compatibility and rapid gas decompression in supercritical CO₂