Measurement of adsorption energy between a solid adsorbent and a liquid adsorbate using differential scanning calorimetry

Sancaktar, Erol; Bakan, Murat; Chang, I-Ta; Satam, Sayali; Farahati, Rashid

doi:10.1016/j.polymertesting.2016.10.011

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…The versatility of the DSC is vast and researchers apply it to assess: coal,() cjceass,() waste,() catalysts,() minerals,() cement,() ceramics,() alloys,() and polymers. () Applications include: gasification,() pyrolysis,() combustion,() adsorption,() desorption,() calcination,() dehydration,() thermal stability,() phase transitions,() phase diagrams,() polymer crystallization,() glass transition, curing time, and reaction kinetics …”

Section: Applicationsmentioning

confidence: 99%

Experimental methods in chemical engineering: Differential scanning calorimetry—DSC

et al. 2018

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Differential calorimetry assesses energy flow between a sample and its environment. The sample may be heated at a known heating rate (either constant or temperature modulated), or held in an isothermal environment or adiabatic environment depending on instrument and experimental design. The subset of differential calorimetry that deals with known heating or cooling rates is termed differential scanning calorimetry (DSC) and is a foundational technique to modern thermodynamics. It reports the heat flow versus temperature or time from which we calculate specific heat capacity at constant pressure, c P , enthalpy of fusion, and the heat of reaction. Moreover, it identifies how microstuctural properties evolve and thermal arrests-a characteristic of phase transitions. Heat-flux DSCs measure the temperature difference between a reference and a sample that sit on a thin two-dimensional plate. Power compensated DSCs heat reference material and the sample in independent furnaces while maintaining each at the same temperature. The Tian-Calvet DSC is similar to the heat-flux DSC, but minimizes error induced at high temperature with ring shaped thermopiles that surround the reference and the sample and in most designs incorporate the independent furnaces characteristic of heat flux DSC (three-dimensional heat flow probe). Convection and radiation energy leaks compromise accuracy above 600 • C, particularly for pan-style heat flux and power-compensated DSC, which are sensitive to heat transfer by conduction only. The Tian-Calvet DSC maximizes the signal-to-noise ratio by enveloping the sample and reference in the thermopile. Web of Science indexed 11 800 articles in 2016 and 2017 that mentioned DSC and assigned 789 to chemical engineering, which ranks it 5th after polymer science, material science, physical chemistry, and multi-disciplinary chemistry. A bibliometric analysis recognizes four research clusters: polymers and nano-composites, alloys and kinetics, nano-particles and drug delivery, and fibres.

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Section: Applicationsmentioning

confidence: 99%

Experimental methods in chemical engineering: Differential scanning calorimetry—DSC

et al. 2018

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“…Through simulation calculations based on density functional theory (DFT) [26][27][28] and MD [29][30][31], we studied the adsorption mechanism of RM for phosphate removal from phosphorus-containing wastewater. Both wettability [32][33][34] and adsorption energy [35][36][37] provide strong evidence to explain adsorption. This study established the crystal structure of cancrinite and built a sodium dodecylbenzene sulfonate (SDBS) wetting layer on its surface.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of phosphate by cancrinite in red mud: a first-principles study

Zhou

Qiu

et al. 2022

Mater. Res. Express

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Cancrinite is the key substance that affects the adsorption effect of phosphate from red mud(RM) . Therefore, cancrinite in RM was modified to improve its adsorption performance. Based on density functional theory(DTF), this paper optimized the structure of cancrinite, the main component of red mud, modified the cancrinite with sodium dodecyl benzene sulfonate, and studied the surface wettability changes of cancrinite before and after modification through dynamics relaxation. The effects of wetting modification on the adsorption properties of cancrinite were studied by molecular dynamics simulation of radial distribution function, adsorption site , adsorption energy and mean square displacement. Research shows that modified cancrinite Surface wettability increased by 77%, also has more adsorption sites, adsorption energy is smaller, diffusion process is accelerated, so the adsorption capacity is stronger. This study lays a theoretical foundation for enhancing the adsorption of phosphate from wastewater by RM.

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