8 results match your criteria Adsorption-journal Of The International Adsorption Society[Journal]

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Improved adsorption reactions, kinetics and stability for model and therapeutic proteins immobilised on affinity resins.

Adsorption (Boston) 2019 16;25(6):1177-1190. Epub 2019 May 16.

1Surfaces and Particle Engineering Laboratory, Department of Chemical Engineering, Imperial College London, London, UK.

Protein adsorption on solid state media is important for the industrial affinity chromatography of biotherapeutics and for preparing materials for self-interaction chromatography where fundamental protein solution thermodynamic properties are measured. The adsorption of three model proteins (lysozyme, catalase and BSA) and two antibodies (a monoclonal and a polyclonal antibody) have been investigated on commercial affinity chromatography media with different surface functionalities (Formyl, Tresyl and Amino). Both the extent of protein immobilised (mg protein/ml media) and the reaction kinetics are reported for a range of reaction conditions, including pH, differing buffers as well as the presence of secondary reactants (glutaraldehyde, sodium cyanoborohydride, EDC and NHS). Read More

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http://dx.doi.org/10.1007/s10450-019-00106-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6683242PMC

A reference high-pressure CO adsorption isotherm for ammonium ZSM-5 zeolite: results of an interlaboratory study.

Adsorption (Boston) 2018 26;24(6):531-539. Epub 2018 Jul 26.

11University of Mons, Mons, Belgium.

This paper reports the results of an international interlaboratory study led by the National Institute of Standards and Technology (NIST) on the measurement of high-pressure surface excess carbon dioxide adsorption isotherms on NIST Reference Material RM 8852 (ammonium ZSM-5 zeolite), at 293.15 K (20 °C) from 1 kPa up to 4.5 MPa. Read More

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http://dx.doi.org/10.1007/s10450-018-9958-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6417222PMC
July 2018
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Relationship between Pore-size Distribution and Flexibility of Adsorbent Materials: Statistical Mechanics and Future Material Characterization Techniques.

Adsorption (Boston) 2017 May 30;23(4):593-602. Epub 2017 Mar 30.

Chemical Sciences Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.

Measurement of the pore-size distribution (PSD) via gas adsorption and the so-called "kernel method" is a widely used characterization technique for rigid adsorbents. Yet, standard techniques and analytical equipment are not appropriate to characterize the emerging class of flexible adsorbents that deform in response to the stress imparted by an adsorbate gas, as the PSD is a characteristic of the material that varies with the gas pressure and any other external stresses. Here, we derive the PSD for a flexible adsorbent using statistical mechanics in the osmotic ensemble to draw analogy to the kernel method for rigid materials. Read More

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http://dx.doi.org/10.1007/s10450-017-9879-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5562161PMC
May 2017
3 Reads

Designing micro- and mesoporous carbon networks by chemical activation of organic resins.

Adsorption (Boston) 2017 15;23(2):303-312. Epub 2016 Dec 15.

1ADPOR Group, Instituto Nacional del Carbon (INCAR, CSIC), 33011 Oviedo, Spain.

Carbon xerogels with ultrahigh micro- and mesopore volumes were synthesized from the activation of polymeric resins prepared by sol-gel polycondensation of resorcinol/formaldehyde mixtures in basic medium and subcritical drying. Various activating conditions (e.g. Read More

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http://dx.doi.org/10.1007/s10450-016-9851-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7064042PMC
December 2016

Probing adsorption on a nanoscale: field desorption microspectroscopy.

Authors:
Yuri Suchorski

Adsorption (Boston) 2017 7;23(2):217-224. Epub 2016 Oct 7.

Institut für Materialchemie, Technische Universität Wien, Getreidemarkt 9, 1060 Vienna, Austria.

Combining an energy analyzer with a field ion microscope equipped with a probe-hole which corresponds to just few atomic surface sites, spatially resolved energy analysis of ions field desorbed from the adsorbent surface is possible on a nm-scale. The experimentally measured values of the kinetic energy of field ions can be related (by means of a thermionic cycle) to the physically meaningful binding energy of corresponding adsorbed species. The development of the technique into a full serviceable micro-spectroscopy on a nanoscale allowed recent detection of the weakly adsorbed CO species on Pt(111) which are largely analogous to those adsorbed at high pressures and provided first results for the binding energy of Li adatoms in a coadsorption system, namely Li-O-W(112) for various lithium and oxygen coverages. Read More

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http://dx.doi.org/10.1007/s10450-016-9824-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7064037PMC
October 2016

Net, excess and absolute adsorption in mixed gas adsorption.

Adsorption (Boston) 2017 24;23(4):569-576. Epub 2017 Feb 24.

Scottish Carbon Capture and Storage, School of Engineering, The University Edinburgh, The King's Buildings, Mayfield Road, Edinburgh, EH9 3FB UK.

The formulation of a thermodynamic framework for mixtures based on absolute, excess or net adsorption is discussed and the qualitative dependence with pressure and fugacity is used to highlight a practical issue that arises when extending the formulations to mixtures and to the Ideal Adsorbed Solution Theory (IAST). Two important conclusions are derived: the correct fundamental thermodynamic variable is the absolute adsorbed amount; there is only one possible definition of the ideal adsorbed solution and whichever starting point is used the same final IAST equations are obtained, contrary to what has been reported in the literature. Read More

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http://dx.doi.org/10.1007/s10450-017-9875-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7010369PMC
February 2017

Techniques for direct experimental evaluation of structure-transport relationships in disordered porous solids.

Adsorption (Boston) 2016 13;22(7):993-1000. Epub 2016 Aug 13.

1Present Address: Department of Chemical and Environmental Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD UK.

Determining structure-transport relationships is critical to optimising the activity and selectivity performance of porous pellets acting as heterogeneous catalysts for diffusion-limited reactions. For amorphous porous systems determining the impact of particular aspects of the void space on mass transport often requires complex characterization and modelling steps to deconvolve the specific influence of the feature in question. These characterization and modelling steps often have limited accuracy and precision. Read More

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http://dx.doi.org/10.1007/s10450-016-9806-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7115062PMC

Net, excess and absolute adsorption and adsorption of helium.

Adsorption (Boston) 2016 1;22(2):261-276. Epub 2016 Feb 1.

Scottish Carbon Capture and Storage, School of Engineering, The University Edinburgh, The King's Buildings, Mayfield Road, Edinburgh, EH9 3FB UK.

The definitions of absolute, excess and net adsorption in microporous materials are used to identify the correct limits at zero and infinite pressure. Absolute adsorption is shown to be the fundamental thermodynamic property and methods to determine the solid density that includes the micropore volume are discussed. A simple means to define when it is necessary to distinguish between the three definitions at low pressure is presented. Read More

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http://dx.doi.org/10.1007/s10450-016-9766-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7115088PMC
February 2016
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