Arsenic poisoning of nickel catalysts for the adsorption of ethene

C. F. Ng; H. Ye; L. She; H. Chen; S. Y. Lai

doi:10.1016/S0926-860X(98)00097-0

Arsenic poisoning of nickel catalysts for the adsorption of ethene

C. F. Ng^*, H. Ye, L. She, H. Chen, S. Y. Lai

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

9 Citations (Scopus)

Abstract

The effect of arsenic poisoning of nickel catalysts for ethene adsorption was studied by the magnetic method and by infrared spectroscopy. Ethene adsorbed dissociatively on clean nickel. Arsine preadsorbed on the surface of nickel inhibited ethene dissociation and so reduced the ethene bond number at low coverage from 8 for clean nickel to 1.3 for nickel preadsorbed with arsine to the amount of 0.55 mmol/g nickel. Heating the arsine-covered nickel to 672-773 K led to segregation of arsenic into the bulk of the nickel, lessening its inhibiting effect for ethene dissociation. Infrared spectroscopy for ethene adsorbed on nickel-arsenic bimetallic catalysts showed that dissociation and self-hydrogenation of adsorbed ethene on nickel was inhibited by arsenic. For the bimetallic catalyst with As:Ni mole ratio of 0.16:1, only π-bonded ethene was observed by infrared spectroscopy.

Original language	English
Pages (from-to)	293-299
Number of pages	7
Journal	Applied Catalysis A: General
Volume	171
Issue number	2
DOIs	https://doi.org/10.1016/S0926-860X(98)00097-0
Publication status	Published - 13 Jul 1998

User-Defined Keywords

Catalyst poisoning (arsenic)
Ethene adsorption
Nickel catalyst

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title = "Arsenic poisoning of nickel catalysts for the adsorption of ethene",

abstract = "The effect of arsenic poisoning of nickel catalysts for ethene adsorption was studied by the magnetic method and by infrared spectroscopy. Ethene adsorbed dissociatively on clean nickel. Arsine preadsorbed on the surface of nickel inhibited ethene dissociation and so reduced the ethene bond number at low coverage from 8 for clean nickel to 1.3 for nickel preadsorbed with arsine to the amount of 0.55 mmol/g nickel. Heating the arsine-covered nickel to 672-773 K led to segregation of arsenic into the bulk of the nickel, lessening its inhibiting effect for ethene dissociation. Infrared spectroscopy for ethene adsorbed on nickel-arsenic bimetallic catalysts showed that dissociation and self-hydrogenation of adsorbed ethene on nickel was inhibited by arsenic. For the bimetallic catalyst with As:Ni mole ratio of 0.16:1, only π-bonded ethene was observed by infrared spectroscopy.",

keywords = "Catalyst poisoning (arsenic), Ethene adsorption, Nickel catalyst",

author = "Ng, {C. F.} and H. Ye and L. She and H. Chen and Lai, {S. Y.}",

note = "Funding Information: The financial support of the Hong Kong Baptist University (grant no. FRG/91-II/23) and the Hong Kong RGC Research Grant Council (grant no. HKBC 190/92E) is gratefully acknowledged. ",

year = "1998",

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doi = "10.1016/S0926-860X(98)00097-0",

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T1 - Arsenic poisoning of nickel catalysts for the adsorption of ethene

AU - Ng, C. F.

AU - Ye, H.

AU - She, L.

AU - Chen, H.

AU - Lai, S. Y.

N1 - Funding Information: The financial support of the Hong Kong Baptist University (grant no. FRG/91-II/23) and the Hong Kong RGC Research Grant Council (grant no. HKBC 190/92E) is gratefully acknowledged.

PY - 1998/7/13

Y1 - 1998/7/13

N2 - The effect of arsenic poisoning of nickel catalysts for ethene adsorption was studied by the magnetic method and by infrared spectroscopy. Ethene adsorbed dissociatively on clean nickel. Arsine preadsorbed on the surface of nickel inhibited ethene dissociation and so reduced the ethene bond number at low coverage from 8 for clean nickel to 1.3 for nickel preadsorbed with arsine to the amount of 0.55 mmol/g nickel. Heating the arsine-covered nickel to 672-773 K led to segregation of arsenic into the bulk of the nickel, lessening its inhibiting effect for ethene dissociation. Infrared spectroscopy for ethene adsorbed on nickel-arsenic bimetallic catalysts showed that dissociation and self-hydrogenation of adsorbed ethene on nickel was inhibited by arsenic. For the bimetallic catalyst with As:Ni mole ratio of 0.16:1, only π-bonded ethene was observed by infrared spectroscopy.

AB - The effect of arsenic poisoning of nickel catalysts for ethene adsorption was studied by the magnetic method and by infrared spectroscopy. Ethene adsorbed dissociatively on clean nickel. Arsine preadsorbed on the surface of nickel inhibited ethene dissociation and so reduced the ethene bond number at low coverage from 8 for clean nickel to 1.3 for nickel preadsorbed with arsine to the amount of 0.55 mmol/g nickel. Heating the arsine-covered nickel to 672-773 K led to segregation of arsenic into the bulk of the nickel, lessening its inhibiting effect for ethene dissociation. Infrared spectroscopy for ethene adsorbed on nickel-arsenic bimetallic catalysts showed that dissociation and self-hydrogenation of adsorbed ethene on nickel was inhibited by arsenic. For the bimetallic catalyst with As:Ni mole ratio of 0.16:1, only π-bonded ethene was observed by infrared spectroscopy.

KW - Catalyst poisoning (arsenic)

KW - Ethene adsorption

KW - Nickel catalyst

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M3 - Journal article

AN - SCOPUS:0348114747

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EP - 299

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

IS - 2

ER -

Arsenic poisoning of nickel catalysts for the adsorption of ethene

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