Evaluation of the catalytic surface of Ni impregnated meso-microporous silica KIT-6 in CH4 dry reforming by inverse gas chromatography

Linping Qian, Kaixiang Huang, Haitao Wang, Mayfair C. Kung, Harold H Kung, Jie Li, Guoping Chen, Qiangguo Du

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Inverse gas chromatography (IGC) was employed in evaluating the catalytic surface of meso-microporous KIT-6 impregnated Ni (0.5–2.0 wt%) in methane dry reforming reaction. The free energy of adsorption did not changed significantly for the sample modified with highly dispersed Ni species (0.5 wt%). At higher Ni loadings, higher free energy of adsorption and enthalpy of adsorption of the probes were observed, together with high dispersive interaction and specific interaction of aromatics. The results indicated that during the impregnation, Ni species preferably penetrated into the microporous region to form Ni particles and became ‘unaccessible’. This feature was used to understand the dependence of activity on Ni loading for the gas phase catalytic methane reforming with carbon dioxide on Ni/KIT-6. The lower TOF at low metal loadings was attributed to Ni particles located in the micropores which result in diffusional constraint of reactants and products.

Original languageEnglish
Pages (from-to)301-310
Number of pages10
JournalMicroporous and Mesoporous Materials
Volume243
DOIs
Publication statusPublished - May 1 2017

Fingerprint

Reforming reactions
gas chromatography
Silicon Dioxide
Gas chromatography
Silica
Methane
silicon dioxide
Adsorption
Free energy
adsorption
evaluation
methane
free energy
Carbon Dioxide
Impregnation
carbon dioxide
Enthalpy
Carbon dioxide
Gases
enthalpy

Keywords

  • Dry reforming
  • Inverse gas chromatography
  • KIT-6
  • Methane
  • Ni
  • Surface property

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

Cite this

Evaluation of the catalytic surface of Ni impregnated meso-microporous silica KIT-6 in CH4 dry reforming by inverse gas chromatography. / Qian, Linping; Huang, Kaixiang; Wang, Haitao; Kung, Mayfair C.; Kung, Harold H; Li, Jie; Chen, Guoping; Du, Qiangguo.

In: Microporous and Mesoporous Materials, Vol. 243, 01.05.2017, p. 301-310.

Research output: Contribution to journalArticle

Qian, Linping ; Huang, Kaixiang ; Wang, Haitao ; Kung, Mayfair C. ; Kung, Harold H ; Li, Jie ; Chen, Guoping ; Du, Qiangguo. / Evaluation of the catalytic surface of Ni impregnated meso-microporous silica KIT-6 in CH4 dry reforming by inverse gas chromatography. In: Microporous and Mesoporous Materials. 2017 ; Vol. 243. pp. 301-310.
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AU - Kung, Mayfair C.

AU - Kung, Harold H

AU - Li, Jie

AU - Chen, Guoping

AU - Du, Qiangguo

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AB - Inverse gas chromatography (IGC) was employed in evaluating the catalytic surface of meso-microporous KIT-6 impregnated Ni (0.5–2.0 wt%) in methane dry reforming reaction. The free energy of adsorption did not changed significantly for the sample modified with highly dispersed Ni species (0.5 wt%). At higher Ni loadings, higher free energy of adsorption and enthalpy of adsorption of the probes were observed, together with high dispersive interaction and specific interaction of aromatics. The results indicated that during the impregnation, Ni species preferably penetrated into the microporous region to form Ni particles and became ‘unaccessible’. This feature was used to understand the dependence of activity on Ni loading for the gas phase catalytic methane reforming with carbon dioxide on Ni/KIT-6. The lower TOF at low metal loadings was attributed to Ni particles located in the micropores which result in diffusional constraint of reactants and products.

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