Cooperative adsorption on solid surfaces

Liu, Shijie

doi:10.1016/j.jcis.2015.03.013

Cited by 167 publications

(69 citation statements)

References 33 publications

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“…The shape of the isotherm produced in our adsorption Table 2) could be described as an s-isotherm according to published classifications [31]. The s-isotherm is indicative of co-operative adsorption where both adsorbent-adsorbate and adsorbant-adsorbant interactions take place and multilayers are formed [32].…”

Section: Adsorption Isothermmentioning

confidence: 84%

Organic compound-mineral interactions: Using flash pyrolysis to monitor the adsorption of fatty acids on calcite

Zafar

Watson

Weiß

et al. 2017

Journal of Analytical and Applied Pyrolysis

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Fatty acids are near ubiquitous organic compounds in living organisms in the Earth's biosphere. Following death of an organism in the marine environment its fatty acids may survive descent to the sea bed where they can be juxtaposed with minerals. The aim of this study was to investigate the interaction of fatty acids with the common marine mineral calcite. Adsorption of tetradecanoic acid (C14) on calcite results in a sigmoidal or "s" isotherm. Flash pyrolysis experiments were conducted on samples of fatty acid adsorbed onto calcite and were compared with similar experiments on pure fatty acid and on salts of a fatty acid. Flash pyrolysis of pure tetradecanoic acid generated unsaturated and saturated hydrocarbons and a series of unsaturated and saturated low molecular weight fatty acids.Flash pyrolysis of free tetradecanoic acid salt produced saturated and unsaturated hydrocarbons, an aldehyde and a homologous series of saturated and unsaturated ketones, one of which was a symmetrical mid chain ketone (14-heptacosanone). Flash pyrolysis data from adsorbed tetradecanoic acid samples suggested that adsorption is analogous to the formation of the calcium salt of tetradecanoic acid. A key characteristic of the flash pyrolysis products of adsorbed fatty acids and fatty acid salts was the production of ketones with higher molecular weights than the starting fatty acids. Ketonisation was not observed from the flash pyrolysis of pure acid which implied the catalytic significance of the calcite mineral surface.The abundance of hydrocarbons relative to ketones in the pyrolysates negatively correlated with the proportion of fatty acids adsorbed to the surface of calcite. The ability to use flash pyrolysis to diagnose the nature of fatty acid interactions with mineral surfaces provides a valuable tool for monitoring the fate of these important lipids at the Earth's surface as they pass into the geosphere and are subjected to diagenetic processes.

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Section: Adsorption Isothermmentioning

confidence: 84%

Organic compound-mineral interactions: Using flash pyrolysis to monitor the adsorption of fatty acids on calcite

Zafar

Watson

Weiß

et al. 2017

Journal of Analytical and Applied Pyrolysis

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“…Apparent multilayer adsorption is an excellent model to translate cooperative adsorption behaviors mathematically (Liu, 2015a). Cooperative adsorption theory considers active sites as consisting of different potential energies on an inhomogeneous catalyst surface.…”

Section: Theorymentioning

confidence: 99%

“…1 illustrated such adsorption behaviors with surface idealization. The mathematic model of cooperative adsorption isotherm behaviors has been studied in Liu (2015aLiu ( , 2015b. For the adsorption of a single species A, the adsorption isotherm on the "i"th layer can be modeled as…”

Section: Theorymentioning

confidence: 99%

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Cooperative adsorption based kinetics for dichlorobenzene dechlorination over Pd/Fe bimetal

Chen

Liu

2015

Chemical Engineering Science

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“…There is a lack of adequate experimental data on ternary and higher component mixtures, and a slight change of the adsorbent generally requires a change of parameters in the present adsorption models. Also, there is certainly insufficient data reported on the effect of operating conditions and adsorption parameters, in terms of temperature, pressure, and initial mixture compositions, especially if water vapor is involved in the mixture …”

Section: Introductionmentioning

confidence: 99%

Experimental and Neural Network Modeling of Partial Uptake for a Carbon Dioxide/Methane/Water Ternary Mixture on 13X Zeolite

et al. 2017

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In this work, GERG2008 EoS embedded in a volumetric–gravimetric technique was utilized to measure multicomponent partial uptakes into the mixture. The sophisticated combination may overlap recent theoretical measurements and replace it with real‐time and experimental selective adsorption analysis. 13X zeolite was utilized as a solid adsorbent for the adsorption of binary and ternary CO2/CH4/H2O mixtures. Premixed and preloaded water vapor was studied at 323 K temperature and up to 10 bar pressure. The isotherms of individual components within the mixture were identified and compared to the adsorption data of the pure components for assured benchmarking and validation. Artificial neural network (ANN) modeling was used to predict ternary mixtures. The ANN results showed a good agreement with the experimental data. Moreover, simulated configurations by utilizing an ANN model reflected the high consistency. We identified the behavior of the single components in ternary and higher multicomponent mixtures.

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Cooperative adsorption on solid surfaces

Cited by 167 publications

References 33 publications

Organic compound-mineral interactions: Using flash pyrolysis to monitor the adsorption of fatty acids on calcite

Organic compound-mineral interactions: Using flash pyrolysis to monitor the adsorption of fatty acids on calcite

Cooperative adsorption based kinetics for dichlorobenzene dechlorination over Pd/Fe bimetal

Experimental and Neural Network Modeling of Partial Uptake for a Carbon Dioxide/Methane/Water Ternary Mixture on 13X Zeolite

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