CO2 adsorption using water-soluble polyaspartamide

Ngoy, Jacob Masiala; Daramola, Michael O.; Chitsiga, Tafara L.; Falcon, Rosemary; Wagner, Nicola J.

doi:10.1016/j.sajce.2017.04.004

Cited by 6 publications

(5 citation statements)

References 17 publications

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“…In order to study the influence of the AgNPs on the thermal stability of the nanocomposites, TGA measurements were conducted in the range from 25 °C to 600 °C. Figure 10 shows a degradation process starting at around 200 °C, which is attributed to the degradation of the polyaspartamide [47]. The gel did not reach 100% of degradation at 600 °C due to the presence of boron which increases the overall stability.…”

Section: Resultsmentioning

confidence: 99%

Polyaspartamide Functionalized Catechol-Based Hydrogels Embedded with Silver Nanoparticles for Antimicrobial Properties

et al. 2018

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In this study, polyaspartamide-based hydrogels were synthesized by boron-catechol coordination followed by incorporation of AgNPs into the materials. Free catechol moieties were exploited to produce AgNPs. TEM analyses displayed AgNPs of less than 20 nm in diameter and with minimum aggregation, attesting the role of hydrogels to act as an efficient template for the production of dispersed particles. XRD analyses confirmed the mean particle size using the Scherrer equation. Release kinetic studies were performed in DMEM medium, showing a slow release over a long time-period. Finally, the MIC and MBC were determined, demonstrating a bacteriostatic and bactericidal effect against Gram-positive S. aureus and Gram-negative E. coli.

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Section: Resultsmentioning

confidence: 99%

Polyaspartamide Functionalized Catechol-Based Hydrogels Embedded with Silver Nanoparticles for Antimicrobial Properties

et al. 2018

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“…The materials used in this study include; polyaspartamide, gas mixture (Composition: 15% CO 2 , 85% N 2 ), and pure Nitrogen gas (100% N 2 ). Polyaspartamide used in this study was not procured but synthesized in our laboratory according to a modified protocol described by Ngoy et al (2014Ngoy et al ( , 2017 while all gases used in this study were purchased from Afrox (Pty) South Africa and used without any further purification. The gas analyzer considered in this study is a single component CO 2 gas analyzer (Model: ABB-AO2020, Dimension: 485 mm 9 460 mm 9 135 mm, Weight: 15 kg, Precision: SO 2 , NO, CO, CO 2-B ± 2%, O 2 B ± 3%, Place of manufacture: Frankfurt, Germany).…”

Section: Methodsmentioning

confidence: 99%

“…Synthesis and characterization of polyaspartamide have been adequately reported in our previous works (Chitsiga et al 2016;Ngoy et al 2017;Yoro et al 2017). A study on the kinetic behaviour of polyaspartamide has also been reported recently (Yoro et al 2017), but the influence of moisture and other operating parameters on the adsorption capacity of polyaspartamide during the adsorption of CO 2 from a flue gas stream is rare and has not attracted adequate attention in the past.…”

Section: Introductionmentioning

confidence: 97%

“…Its rich amine-content, high thermal stability, high adsorption capacity and ability to be regenerated after use makes it a potential material for CO 2 capture. Details on its preparation and cost have been reported extensively in our previous works (Ngoy et al 2017;Chitsiga et al 2016). Hence, it is not repeated in this work.…”

Section: Introductionmentioning

confidence: 99%

“…The key elements of a good adsorbent for CO 2 capture are; rapid adsorption/desorption kinetics, moisture resistance, stable adsorption capacity after repeated cycles and adequate mechanical strength of the particles (Titinchi et al 2014;Veneman et al 2015;. Most of these key elements for a good adsorbent have been studied and reported in literature for most adsorbents (Alhwaige et al 2016;Ding et al 2016;Osler et al 2017a, b;Singo et al 2017;Yoro et al 2016;Ngoy et al 2017;. The effect of moisture on adsorbents during CO 2 capture needs to be studied in-depth because most times, moisture usually occupy the pores of adsorbents and most adsorbents have exhibited a higher affinity for moisture than CO 2 (Amponsah et al 2014;Leung et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Modelling and experimental investigation of effects of moisture and operating parameters during the adsorption of CO2 onto polyaspartamide

Yoro

Amosa

Sekoai

et al. 2018

Int J Coal Sci Technol

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Parametric effect of moisture and influence of operating variables on the adsorption behaviour of polyaspartamide during CO 2 capture was investigated in this study using experimental and modelling approach. Individual effects of operating conditions (e.g. pressure, temperature and gas flow rates) as well as the effect of moisture on the adsorption capacity of polyaspartamide were methodically investigated using Dubinin-Raduskevich model. Results from the investigations reveal that the presence of moisture in the flue gas had an incremental effect on the adsorption capacity of polyaspartamide; thereby showcasing the potential of polyaspartamide as a suitable hydrophilic material for CO 2 capture in power plants. In addition, pressure, temperature and gas flow rates at 200 kPa, 403 K, and 1.5 mL/s, respectively, significantly influenced the CO 2 adsorption capacity of polyaspartamide. Physisorption and chemisorption both governed the adsorption process while equilibrium studies at different temperatures showed that Langmuir isotherm could adequately describe the adsorption behaviour of the material with best fit with R 2 [ 0.95.

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