Mobility of hydrogen in microporous silica studied with quasi-elastic neutron scattering

Nieck Edwin Benes, Herve Jobic, Valerie Reat, Henricus J.M. Bouwmeester, H. Verweij

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The mobility of H2 in microporous amorphous silica is studied using quasi-elastic neutron scattering. At T=90 K the self-diffusion coefficient is approximately Ds=1.2×10−8 m2 s−1 for low degrees of occupancy (<20%) and decreases slightly to Ds=0.95×10−8 m2 s−1 for an occupancy of 31%. A rough estimate for the energy of activation yields Em=1.4 kJ mol−1. Comparison of the results obtained for silica with those of zeolites indicates a pore size for silica in the range of 4–5 Å.
Original languageUndefined
Pages (from-to)9-15
Number of pages7
JournalSeparation and purification technology
Volume32
Issue number1-3
DOIs
Publication statusPublished - 2003

Keywords

  • IR-72226
  • METIS-215278

Cite this

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title = "Mobility of hydrogen in microporous silica studied with quasi-elastic neutron scattering",
abstract = "The mobility of H2 in microporous amorphous silica is studied using quasi-elastic neutron scattering. At T=90 K the self-diffusion coefficient is approximately Ds=1.2×10−8 m2 s−1 for low degrees of occupancy (<20{\%}) and decreases slightly to Ds=0.95×10−8 m2 s−1 for an occupancy of 31{\%}. A rough estimate for the energy of activation yields Em=1.4 kJ mol−1. Comparison of the results obtained for silica with those of zeolites indicates a pore size for silica in the range of 4–5 {\AA}.",
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author = "Benes, {Nieck Edwin} and Herve Jobic and Valerie Reat and Bouwmeester, {Henricus J.M.} and H. Verweij",
year = "2003",
doi = "10.1016/S1383-5866(03)00026-1",
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volume = "32",
pages = "9--15",
journal = "Separation and purification technology",
issn = "1383-5866",
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Mobility of hydrogen in microporous silica studied with quasi-elastic neutron scattering. / Benes, Nieck Edwin; Jobic, Herve; Reat, Valerie; Bouwmeester, Henricus J.M.; Verweij, H.

In: Separation and purification technology, Vol. 32, No. 1-3, 2003, p. 9-15.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Mobility of hydrogen in microporous silica studied with quasi-elastic neutron scattering

AU - Benes, Nieck Edwin

AU - Jobic, Herve

AU - Reat, Valerie

AU - Bouwmeester, Henricus J.M.

AU - Verweij, H.

PY - 2003

Y1 - 2003

N2 - The mobility of H2 in microporous amorphous silica is studied using quasi-elastic neutron scattering. At T=90 K the self-diffusion coefficient is approximately Ds=1.2×10−8 m2 s−1 for low degrees of occupancy (<20%) and decreases slightly to Ds=0.95×10−8 m2 s−1 for an occupancy of 31%. A rough estimate for the energy of activation yields Em=1.4 kJ mol−1. Comparison of the results obtained for silica with those of zeolites indicates a pore size for silica in the range of 4–5 Å.

AB - The mobility of H2 in microporous amorphous silica is studied using quasi-elastic neutron scattering. At T=90 K the self-diffusion coefficient is approximately Ds=1.2×10−8 m2 s−1 for low degrees of occupancy (<20%) and decreases slightly to Ds=0.95×10−8 m2 s−1 for an occupancy of 31%. A rough estimate for the energy of activation yields Em=1.4 kJ mol−1. Comparison of the results obtained for silica with those of zeolites indicates a pore size for silica in the range of 4–5 Å.

KW - IR-72226

KW - METIS-215278

U2 - 10.1016/S1383-5866(03)00026-1

DO - 10.1016/S1383-5866(03)00026-1

M3 - Article

VL - 32

SP - 9

EP - 15

JO - Separation and purification technology

JF - Separation and purification technology

SN - 1383-5866

IS - 1-3

ER -