Permanent Hysteresis in Physical Adsorption. A Theoretical Discussion.

Katz, S. Montana

doi:10.1021/j150473a003

Cited by 30 publications

(12 citation statements)

References 6 publications

(10 reference statements)

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“…Low and high pressure hystereses have occurred for lower rank bituminous coals. They have suggested that the high pressure hysteresis was due to the ink-bottle effect [41]: some pores in coals are not fully open in the neck which allows pore filling but makes desorption more difficult due to capillary forces. These narrow pores are present in low rank coals, but during coalification processes, these apertures are closed off and inaccessible to gas and vapors in higher rank coals such as Albert coal [40].…”

Section: Adsorption/desorption Hysteresismentioning

confidence: 99%

Water sorption on coals

Charrière

Behra

2010

Journal of Colloid and Interface Science

237

158

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Section: Adsorption/desorption Hysteresismentioning

confidence: 99%

Water sorption on coals

Charrière

Behra

2010

Journal of Colloid and Interface Science

237

158

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“…In early studies (Rao, 1941;Katz, 1949), another kind of experimental secondary curves was reported. These curves cross over the boundary curves before joining their respective limiting point U or L. Neimark (1991) has explained the shape of two different kinds of scanning curves by the existence of two particular pore space models.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…Many experimental and theoretical studies have been reported on the hysteresis phenomenon (Rao, 1941;Katz, 1949; Barrer et al, 1956;Everett, 1967;Everett and Haynes, 1972;Neimark, 1986;Burgess et al, 1989; Pan and Mersmann, 1990; Rudisill et al, 1992). Of particular interest to this study are the treatments using statistical mechanical and computational techniques (Wall and Brown, 1981;Zhdanov et al, 1987;Seaton, 1991;Liu et al, 1993;Yanuka, 1990; and the literature cited therein).…”

Section: Introductionmentioning

confidence: 96%

A simple model and experiments for adsorption‐desorption hysteresis: Water vapor on silica gel

Rajniak

Yang

1993

AIChE Journal

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A simple model is proposed for the evaluation of the primary and secondary adsorption and desorption processes for hysteresis-dependent sorption systems. The model is based on the use of pore blocking interpretation of hysteresis in an interconnected network of pores. The model is simple to use and requires only the primary adsorption and primary desorption isotherms to predict all secondary desorption and adsorption isotherms. A complete set of equilibrium adsorption-desorption curves covering the hysteresis loop (appearing in the range of relative pressure 0.3-0.7) was measured for water vapor on silica gel at 25°C. The usefulness of the model is supported by its agreement with experimental data.

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“…Hysteresis in magnets [1,2] is a paradigm for all history dependent behavior in nature [3,4,5]. In addition, hysteresis is the cornerstone of the magnetic data storage industry, and of great technological importance [6].…”

Section: Introductionmentioning

confidence: 99%

Hysteresis multicycles in nanomagnet arrays

Mai¹,

Narayan²

2005

Phys. Rev. E

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We predict two new physical effects in arrays of single-domain nanomagnets by performing simulations using a realistic model Hamiltonian and physical parameters. First, we find hysteretic multicycles for such nanomagnets. The simulation uses continuous spin dynamics through the Landau-Lifshitz-Gilbert (LLG) equation. In some regions of parameter space, the probability of finding a multicycle is as high as ∼ 0.6. We find that systems with larger and more anisotropic nanomagnets tend to display more multicycles. Our results also demonstrate the importance of disorder and frustration for multicycle behavior. Second, we show that there is a fundamental difference between the more realistic vector LLG equation and scalar models of hysteresis, such as Ising models. In the latter case spin and external field inversion symmetry is obeyed, but in the former it is destroyed by the dynamics, with important experimental implications.

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Permanent Hysteresis in Physical Adsorption. A Theoretical Discussion.

Cited by 30 publications

References 6 publications

Water sorption on coals

Water sorption on coals

A simple model and experiments for adsorption‐desorption hysteresis: Water vapor on silica gel

Hysteresis multicycles in nanomagnet arrays

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