The modification of Ho2O3 with BaCl2 for the oxidative dehydrogenation of ethane

C. T. Au; K. D. Chen; H. X. Dai; Y. W. Liu; C. F. Ng

doi:10.1016/S0926-860X(98)00267-1

The modification of Ho₂O₃ with BaCl₂ for the oxidative dehydrogenation of ethane

C. T. Au^*, K. D. Chen, H. X. Dai, Y. W. Liu, C. F. Ng

^*Corresponding author for this work

Department of Chemistry

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

23 Citations (Scopus)

Abstract

The addition of BaCl₂ to Ho₂O₃ could improve considerably both the C₂H₆ conversion and C₂H₄ selectivity in the oxidative dehydrogenation of ethane (ODE) reaction. At 640°C, C₂H₆:O₂:N₂=2:1:4, and W/F=0.6 g s ml^-1, C₂H₆ conversion of ca. 57%, C₂H₄ selectivity of ca. 68%, and C₂H₄ yield of ca. 39% were observed over the 50 mol% BaCl₂/Ho₂O₃ catalyst within a reaction period of 40 h. We conclude that the addition of BaCl₂ to Ho₂O₃ can 1. enhance oxygen activation, 2. prevent a certain amount of active basic sites from being occupied by CO₂, and 3. suppress C₂H₄ deep oxidation. The presence of Cl^- ions could induce the formation of new active sites suitable for C₂H₄ generation. For the 50 mol% BaCl₂/ Ho₂O₃ catalyst, chlorine leaching was insignificant during the ODE reactions. This could be the reason why the catalyst was stable within the reaction period of 40 h.

Original language	English
Pages (from-to)	185-191
Number of pages	7
Journal	Applied Catalysis A: General
Volume	177
Issue number	2
DOIs	https://doi.org/10.1016/S0926-860X(98)00267-1
Publication status	Published - 22 Feb 1999

Scopus Subject Areas

Catalysis
Process Chemistry and Technology

User-Defined Keywords

BaCl
Catalyst
Ethane
HoO
Oxidative dehydrogenation
Promoter

Access to Document

10.1016/S0926-860X(98)00267-1

Cite this

@article{ffeaa8b2012d4c51ba07449e81cae9df,

title = "The modification of Ho2O3 with BaCl2 for the oxidative dehydrogenation of ethane",

abstract = "The addition of BaCl2 to Ho2O3 could improve considerably both the C2H6 conversion and C2H4 selectivity in the oxidative dehydrogenation of ethane (ODE) reaction. At 640°C, C2H6:O2:N2=2:1:4, and W/F=0.6 g s ml-1, C2H6 conversion of ca. 57%, C2H4 selectivity of ca. 68%, and C2H4 yield of ca. 39% were observed over the 50 mol% BaCl2/Ho2O3 catalyst within a reaction period of 40 h. We conclude that the addition of BaCl2 to Ho2O3 can 1. enhance oxygen activation, 2. prevent a certain amount of active basic sites from being occupied by CO2, and 3. suppress C2H4 deep oxidation. The presence of Cl- ions could induce the formation of new active sites suitable for C2H4 generation. For the 50 mol% BaCl2/ Ho2O3 catalyst, chlorine leaching was insignificant during the ODE reactions. This could be the reason why the catalyst was stable within the reaction period of 40 h.",

keywords = "BaCl, Catalyst, Ethane, HoO, Oxidative dehydrogenation, Promoter",

author = "Au, {C. T.} and Chen, {K. D.} and Dai, {H. X.} and Liu, {Y. W.} and Ng, {C. F.}",

note = "Funding Information: The project was supported by the Hong Kong Research Grants Council, UGC (HKBU2050/97P).",

year = "1999",

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doi = "10.1016/S0926-860X(98)00267-1",

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T1 - The modification of Ho2O3 with BaCl2 for the oxidative dehydrogenation of ethane

AU - Au, C. T.

AU - Chen, K. D.

AU - Dai, H. X.

AU - Liu, Y. W.

AU - Ng, C. F.

N1 - Funding Information: The project was supported by the Hong Kong Research Grants Council, UGC (HKBU2050/97P).

PY - 1999/2/22

Y1 - 1999/2/22

N2 - The addition of BaCl2 to Ho2O3 could improve considerably both the C2H6 conversion and C2H4 selectivity in the oxidative dehydrogenation of ethane (ODE) reaction. At 640°C, C2H6:O2:N2=2:1:4, and W/F=0.6 g s ml-1, C2H6 conversion of ca. 57%, C2H4 selectivity of ca. 68%, and C2H4 yield of ca. 39% were observed over the 50 mol% BaCl2/Ho2O3 catalyst within a reaction period of 40 h. We conclude that the addition of BaCl2 to Ho2O3 can 1. enhance oxygen activation, 2. prevent a certain amount of active basic sites from being occupied by CO2, and 3. suppress C2H4 deep oxidation. The presence of Cl- ions could induce the formation of new active sites suitable for C2H4 generation. For the 50 mol% BaCl2/ Ho2O3 catalyst, chlorine leaching was insignificant during the ODE reactions. This could be the reason why the catalyst was stable within the reaction period of 40 h.

AB - The addition of BaCl2 to Ho2O3 could improve considerably both the C2H6 conversion and C2H4 selectivity in the oxidative dehydrogenation of ethane (ODE) reaction. At 640°C, C2H6:O2:N2=2:1:4, and W/F=0.6 g s ml-1, C2H6 conversion of ca. 57%, C2H4 selectivity of ca. 68%, and C2H4 yield of ca. 39% were observed over the 50 mol% BaCl2/Ho2O3 catalyst within a reaction period of 40 h. We conclude that the addition of BaCl2 to Ho2O3 can 1. enhance oxygen activation, 2. prevent a certain amount of active basic sites from being occupied by CO2, and 3. suppress C2H4 deep oxidation. The presence of Cl- ions could induce the formation of new active sites suitable for C2H4 generation. For the 50 mol% BaCl2/ Ho2O3 catalyst, chlorine leaching was insignificant during the ODE reactions. This could be the reason why the catalyst was stable within the reaction period of 40 h.

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KW - Oxidative dehydrogenation

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