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Showing 1 to 5 of 5 for “"Zero Length Column"”.
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The measurement and modelling of the intracrystalline diffusion of cyclohexane in ZSM-5 using zero length column chromatography
… This thesis presents an investigation, using the zero length column (ZLC) method, into changes in the diffusional properties of cyclohexane in ZSM-5 that has had tetraethoxysilane deposited on the surface in the liquid phase. Theoretical analyses of the ZLC technique and its use in a detailed …
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A study of the decay of acid cationic ion exchange resin
… system) consisting of a variable-pump, a five mL zero length column (ZLC) and a reservoir, allowing for the insertion of probes and sample extraction. An original method of model simulation for the purposes of fitting to kinetic data was developed and consists of determining the resin surface …
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Surface adsorption and pore-level properties of mineral and related systems of relevance to the recycling of paper
… for the enhanced wetting of a sample. A zero length column was used to study diffusion and desorption of benzene with calcium carbonate. Desorption and diffusion coefficients for calcium carbonate systems were calculated from the corrected concentration versus time measurements. They …
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Nanoporous Calcium Carbonate-Based Substrates for the Controlled Delivery of Functional Materials
… outlined in Chapter 6. Chapter 7 describes the `zero length column' (ZLC) technique, which was used as a way to characterise the diffusivity of the intraparticle pores of each FCC grade. However, it was established that there are many experimental artefacts present with such a method. This work …
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Adsorption behavior of volatile organic componds in metal-organic frameworks
… were done investigating the applicability of zero-length column (ZLC) equilibrium and temperature-programmed desorption (TPD) applications to the characterization of VOC adsorption in MOFs. It was determined that significant complications are present in the applicability of both of these …