Adsorption and catalytic reactions on evaporated metal films. X. Adsorption and interaction of hydrogen and oxygen on molybdenum

Ponec, V.; Knor, Z.; Černý, S.

doi:10.1135/cccc19643031

Cited by 19 publications

(22 citation statements)

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“…A rearrangement of the surface upon the chemisorption of polar molecules is thought to occur, thus initiating an increase in the entropy of the system. This rationale is confirmed by the positive values of S s a , and supported by the experimentally verified phenomenon of the rearrangement of the surface layers due to chemisorption [41].…”

Section: Adsorption Of Polar Probes On Pbt a And On Pbt Bsupporting

confidence: 64%

Lewis acid/base character and crystallisation properties of poly(butylene terephthalate)

Santos

Guthrie

2015

Journal of Chromatography A

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Two grades of poly(butylene terephthalate) were analysed by means of inverse gas chromatography (IGC) and the results correlated with the respective crystallisation properties. The following parameters were determined by IGC: the dispersive component of the surface tension, the enthalpy and the entropy of adsorption of selected polar and apolar probes, and the Lewis acidity and basicity constants, Ka and Kb respectively. The interpretation of the values determined for Ka and Kb is in agreement with the FTIR spectra relating to the carboxyl end-group and the hydroxyl end-group concentrations in these polymers. The differences in the molecular weight values and in the end-group type and concentration, between the two grades of PBT, do not cause differences in the crystallisation activation energy. This observation suggests that there is a leading contribution of the Lewis basic sites to the crystallisation activation energy of the grades of PBT that were analysed. However, the lower value of Ka and the greater molar mass of one of the PBT grades lead to a corresponding lower crystallisation degree.

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Section: Adsorption Of Polar Probes On Pbt a And On Pbt Bsupporting

confidence: 64%

Lewis acid/base character and crystallisation properties of poly(butylene terephthalate)

Santos

Guthrie

2015

Journal of Chromatography A

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“…To understand the adsorption process, the adsorption equilibria are introduced to describe the adsorption process and several state equations known as isotherms of adsorption are proposed [318,319]. Several basic theories have been proposed and used to define the main isotherms of an adsorption process, the Henry's law [320], the Langmuir's approach [321], the Gibbs' theory, and the adsorption potential theory; other recent equations have been developed recently and are presented in Table 10. Compared to traditional adsorbents used in heat pump applications, like zeolites or aluminophosphates, MOFs exhibit a much richer variety in terms of composition, pore structure, and topology.…”

Section: Absorption Systemsmentioning

confidence: 99%

Review on sorption materials and technologies for heat pumps and thermal energy storage

2017

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Sorption is used for absorption/adsorption heat pumps (sorption refrigeration) and sorption for thermal energy storage (TES). This paper is the first review where the research on both applications is shown together. Sorption has advanced very much due to the immense amount of research carried out around heat pumping and solar refrigeration. Moreover, sorption and thermochemical heat storage attracted considerable attention recently since this technology offers various opportunities in the design of renewable and sustainable energy systems. The paper presents the operation principle of the technology and the materials used or in research are listed and compared. Absorption heat pumping and refrigeration research is today more focussed in the decrease of unit costs and increase of energy efficiency, adsorption is focussed in finding more efficient working pairs, and storage is testing the first prototypes and designing new ones with different or enhanced storage materials and new reactor concepts to optimize energy output.

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“…Purification through adsorption is another filteration mechanism that goes beyond membrane activity. Adsorption is defined as a surface process where atoms and molecules of a fluid (gas or liquid) adhere into the surface of a solid [28,29]. Figure 2 shows an SEM-image of activated charcoal.…”

Section: Chemical Purification; Activated Charcoalmentioning

confidence: 99%

“…The main characteristic of such material is its high porosity, which translates into a large inner surface area compared to a relatively small volume. The high available surface area results in high adsorption of large amounts of particles flowing within a fluid medium on the inner surface of the activated charcoal [28,29]. Such porous materials with high adsorption properties are widely used in gas and water filtration technology [30,31].…”

Section: Chemical Purification; Activated Charcoalmentioning

confidence: 99%

Rethinking Filter: An Interdisciplinary Inquiry into Typology and Concept of Filter, Towards an Active Filter Model

Razghandi

Yaghmaei

2020

Sustainability

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This works aims to re-investigate different aspects of a variety of filters and filtration processes within diverse realms of knowledge from an interdisciplinary point of view, and develop a comprehensive Active Model of Filter that accommodates the phenomena in its entire diversity and complexity. The Active Filter Model proposes to take Filter—from various fields and scales operating at material and symbolic level—not as mere objects, but as difference-producing phenomena that need to be addressed as complex active systems within event-based boundaries. The model underlines a systemic, operative, performative, and negentropic nature to the phenomena that invites one to; recognize various elements and intra-actions within a filter system; follow chains of operations and processes that render the activity; take the performative and ecology building aspect of the filter activity into consideration; and acknowledge the negentropic, order-producing nature of filtering phenomena. The Active Filter Model is meant to serve as a foundation for further analysis and synthesis in various fields dealing with Filter, and the research approach is put forward as a paradigm for how seemingly disciplinary concepts such as Filter can be rethought through interdisciplinary methods, and mutually complement research questions within active matter, biology, information philosophy, data science and sustainability discourses.

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Adsorption and catalytic reactions on evaporated metal films. X. Adsorption and interaction of hydrogen and oxygen on molybdenum

Cited by 19 publications

References 0 publications

Lewis acid/base character and crystallisation properties of poly(butylene terephthalate)

Lewis acid/base character and crystallisation properties of poly(butylene terephthalate)

Review on sorption materials and technologies for heat pumps and thermal energy storage

Rethinking Filter: An Interdisciplinary Inquiry into Typology and Concept of Filter, Towards an Active Filter Model

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