A new experimental technique for measurement of intracrystalline diffusivity

Eić, Mladen; Ruthven, Douglas M.

doi:10.1016/s0144-2449(88)80028-9

Cited by 300 publications

(248 citation statements)

References 5 publications

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“…For large values of t, i.e. when measuring the tail of the desorption curve, only the first root of Equation (6) contributes to the summation, thereby reducing to a simple exponential decay curve shown in Equation (9) (Eic and Ruthven, 1988a). This solution has a linear asymptote in the long time region, from which the slope and intercept of plotting ln(c/c 0 ) against t provide ZLC parameters, D and L.…”

Section: Frtmentioning

confidence: 99%

Using temporal analysis of products and flux response technology to determine diffusion coefficients in catalytic monoliths

Maguire

Sasegbon

Abdelkader

et al. 2013

Chemical Engineering Science

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Section: Frtmentioning

confidence: 99%

Using temporal analysis of products and flux response technology to determine diffusion coefficients in catalytic monoliths

Maguire

Sasegbon

Abdelkader

et al. 2013

Chemical Engineering Science

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“…S1 in the Supporting Information). The isotherm of n-heptane was assumed to follow Henry's law [49 -51] under the experimental conditions in this work, therefore, the apparent diffusivity of n-heptane (D app ) can be obtained using a long-time analysis, from the desorption curve described by [45,47]:…”

Section: Zero Length Column Methodsmentioning

confidence: 99%

Probing the Nature of Surface Barriers on ZSM‐5 by Surface Modification

Guo

Sun

et al. 2017

Chemie Ingenieur Technik

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The nature of external surface barriers in the zeolite ZSM-5 was explored by comparing mass transfer of n-heptane in samples with different crystal sizes, surface structure, and composition. These different surface properties were achieved by HF acid etching and SiO 2 deposition on an as-synthesized ZSM-5 crystal sample. HF etching does not reduce surface barriers. SiO 2 deposition on the same sample reduces surface barriers significantly. These insights into the nature of surface barriers could be used to guide the rational design of zeolitic materials with better mass transport properties.

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“…hydrocarbons). This experimental method and the mathematical model for ZLC were developed by Eic and Ruthven [5] for linear adsorption isotherms of hydrocarbons in zeolites.…”

Section: Introductionmentioning

confidence: 99%

Fractional order modelling of zero length column desorption response for adsorbents with variable particle sizes

Machado¹,

Zaman²,

Băleanu³

2013

Open Physics

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Abstract:This manuscript analyses the data generated by a Zero Length Column (ZLC) diffusion experimental set-up, for 1,3 Di-isopropyl benzene in a 100% alumina matrix with variable particle size. The time evolution of the phenomena resembles those of fractional order systems, namely those with a fast initial transient followed by long and slow tails. The experimental measurements are best fitted with the Harris model revealing a power law behavior.PACS (2008)

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A new experimental technique for measurement of intracrystalline diffusivity

Cited by 300 publications

References 5 publications

Using temporal analysis of products and flux response technology to determine diffusion coefficients in catalytic monoliths

Using temporal analysis of products and flux response technology to determine diffusion coefficients in catalytic monoliths

Probing the Nature of Surface Barriers on ZSM‐5 by Surface Modification

Fractional order modelling of zero length column desorption response for adsorbents with variable particle sizes

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