Reversibility Studies of Clay Hydration Degree in its Natural and Composite Condition

Castrillo, Natalia; Mercado, Adela; Bolzone, Cristina

doi:10.1016/j.mspro.2015.04.017

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…According to Figure 7(a) and (b), after the second cycle, the adsorption rate reduced to 48.32% and 52.88% for shale and coal, respectively. This is attributed to a reduction in the specific surface area that directly affects the pore volume (Castrillo et al., 2015). In addition, during regeneration, a considerable amount of the adsorbents is lost (Doğan and Aydın, 2014).…”

Section: Resultsmentioning

confidence: 99%

Adsorption isotherms and kinetics of vanadium by shale and coal waste

Kajjumba

Aydın

Güneysu

2017

Adsorption Science & Technology

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The use of adsorption using nanomaterials has become a very competitive method for removal of hazardous materials from wastewater. With increasing consumption of fossil fuels and development of energy storage systems, the levels of vanadium pollution are expected to increase. Utilizing natural shale and coal waste as adsorbents, batch adsorption, isotherms, and kinetics of vanadium was studied. The adsorption characteristics of shale and coal waste were studied using Fourier Transform Infrared spectroscope and Scanning Electron Microscopy. The effect of pH, the amount of adsorbent, vanadium concentration, temperature, and contact time between adsorbate and adsorbents were also studied to obtain optimum conditions for maximum adsorption of vanadium. The Fourier Transform Infrared results show little distortion in the vibration of bands, and hence the surface properties remain unchanged for both sorbents after adsorption. The adsorption kinetics are best described by pseudo-second order, while Langmuir model fits the adsorption isotherm for both adsorbents. Maximum sorption capacity is 67.57 mg/g for shale while that of coal is 59.88 mg/g at 298 K and pH 3. For both adsorbents, the adsorption process is spontaneous, endothermic, and chemisorption in nature. Both adsorbents can effectively be recycled twice.

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Section: Resultsmentioning

confidence: 99%

Adsorption isotherms and kinetics of vanadium by shale and coal waste

Kajjumba

Aydın

Güneysu

2017

Adsorption Science & Technology

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“…Furthermore, the presence of two types of cation (e.g., Na + and Ca 2+ ) may produce the heat release stages at various values of relative humidity, which could be of interest for storage uses [ 321 ]. Finally, Castrillo et al [ 322 ] demonstrated that the regeneration of bentonite at low temperatures (below 373 K) was not 100% effective, leading to a slow decrease in the adsorption capacity after successive regeneration steps (i.e., loss of 15–17% after 5 cycles).…”

Section: Presentation Of Adsorbent Candidates For Adsorption-basedmentioning

confidence: 99%

A Critical Review of Solid Materials for Low-Temperature Thermochemical Storage of Solar Energy Based on Solid-Vapour Adsorption in View of Space Heating Uses

Salles

Zając

2019

Molecules

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The present report deals with low-temperature thermochemical storage for space heating, which is based on the principles of vapour adsorption onto solid adsorbents. With the aim of obtaining comprehensive information on the rationalized selection of adsorbents for heat storage in open sorption systems operating in the moist-air flow mode, various materials reported up to now in the literature are reviewed by referring strictly to the possible mechanisms of water vapour adsorption, as well as practical aspects of their preparation or their application under particular operating conditions. It seems reasonable to suggest that, on the basis of the current state-of-the-art, the adsorption phenomenon may be rather exploited in the auxiliary heating systems, which provide additional heat during winter’s coldest days.

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Reversibility Studies of Clay Hydration Degree in its Natural and Composite Condition

Cited by 2 publications

References 11 publications

Adsorption isotherms and kinetics of vanadium by shale and coal waste

Adsorption isotherms and kinetics of vanadium by shale and coal waste

A Critical Review of Solid Materials for Low-Temperature Thermochemical Storage of Solar Energy Based on Solid-Vapour Adsorption in View of Space Heating Uses

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