Experimental clarification of the desorption of H2, D2 and He mixtures from cryosorption pumps

Terashita, Masashi; Fukada, Satoshi

doi:10.1016/j.jnucmat.2010.12.296

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…The experimental apparatus is the same as that shown in our previous study. 5,6) The vacuum chamber has a volume of 3.2 L. The chamber is composed of three parts; (i) activated carbon adsorbent that is cooled around at 10 K, (ii) a cryopanel part that is cooled at around 10 K, and (iii) a baffle-panel part cooled around at 80 K. Cooling is performed using two-stage cooling units, which can cool maximally down to 10 K. The cryopanel is coated with a thin activated charcoal film as adsorbent. The temperature is measured using Chromel-AuFe (0.07%) thermocouples.…”

Section: Methodsmentioning

confidence: 99%

“…Previously, there was some research to investigate processes of adsorption and desorption of a single component of He or H 2 and two-component mixtures on activated carbon utilized for cryosorption pumps. 5,6) In addition, the performance of gas adsorption in a large-scale cryosorption pump was experimentally investigated by the ITER group. 7,8) The basic adsorption and desorption mechanism and the isotherm of activated carbon for various gaseous molecules were investigated previously.…”

Section: Introductionmentioning

confidence: 99%

“…7,8) The basic adsorption and desorption mechanism and the isotherm of activated carbon for various gaseous molecules were investigated previously. 5,6,8,9) However, there is no analytical or experimental study on the adsorption and desorption behavior of multicomponent gas mixtures on the adsorbent. In the present study, experimental results and analytical equations for the three-component gas adsorption and desorption of He, H 2 , and CH 4 are presented.…”

Section: Introductionmentioning

confidence: 99%

“…There is less isotope effect in adsorption or desorption on activated carbon among hydrogen isotopes of H 2 , D 2 , and T 2 . 6,7)…”

Section: Introductionmentioning

confidence: 99%

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Mixed Desorption of He, H₂, and CH₄Adsorbed on Charcoal Maximally Cooled at 10K

Fukada

Terashita

2010

Journal of Nuclear Science and Technology

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Desorption rates of mixtures of He, H 2 , and CH 4 adsorbed on activated carbon placed in an enclosed vessel are determined under the condition where the temperature is elevated from 10K to room temperature. Activated carbon is selected because of its good adsorption performance at the cryogenic temperature. The carbon used in the present study is covered with or mesopores or micropores from 1 nm to 10 nm in diameter. The adsorption and desorption of their respective gases proceed independently, and desorption behavior of each component is well expressed in terms of a Langmuir-Freundlich isotherm. Since desorption curves under different heating conditions can be correlated to the same one on a (T-p t ) plot, it is considered that gas desorption proceeds under equilibrium condition between the adsorbent and gaseous phases. Two-or three-component desorption of He, H 2 , and CH 4 from activated carbon can be described using an extended multicomponent Langmuir-Freundlich isotherm without any correction. Desorption curves calculated for their respective gases are in comparatively good agreement with experimental data.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…There is less isotope effect in adsorption or desorption on activated carbon among hydrogen isotopes of H 2 , D 2 , and T 2 . 6,7)…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mixed Desorption of He, H₂, and CH₄Adsorbed on Charcoal Maximally Cooled at 10K

Fukada

Terashita

2010

Journal of Nuclear Science and Technology

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“…Fig. 3 Adsorption of a helium/hydrogen/air mixture on activated charcoal at 24 K Mixtures of 3 He/D 2 /Air were used for (a) and mixtures of 4 He/H 2 /Air were used for (b). The indexes in the figures mean total volume of helium/hydrogen/air at a room temperature and pressure.…”

mentioning

confidence: 99%