Adsorption and Deactivation Characteristics of Cu/ZnO-Based Catalysts for Methanol Synthesis from Carbon Dioxide
Journal Article
·
· Topics in Catalysis
The adsorption and deactivation characteristics of coprecipitated Cu/ZnO-based catalysts were examined and correlated to their performance in methanol synthesis from CO₂ hydrogenation. The addition of Ga₂O₃ and Y₂O₃ promoters is shown to increase the Cu surface area and CO₂/H₂ adsorption capacities of the catalysts and enhance methanol synthesis activity. Infrared studies showed that CO₂ adsorbs spontaneously on these catalysts at room temperature as both monoand bi-dentate carbonate species. These weakly bound species desorb completely from the catalyst surface by 200 °C while other carbonate species persist up to 500 °C. Characterization using N₂O decomposition, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) with energy-dispersive X-ray spectroscopy (EDX) analysis clearly indicated that Cu sintering is the main cause of catalyst deactivation. Ga and Y promotion improves the catalyst stability by suppressing the agglomeration of Cu and ZnO particles under pretreatment and reaction conditions.
- Research Organization:
- National Energy Technology Laboratory - In-house Research; National Energy Technology Laboratory (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- DOE Contract Number:
- FE0004000
- OSTI ID:
- 1127211
- Report Number(s):
- UNIV-PUB-53
- Journal Information:
- Topics in Catalysis, Journal Name: Topics in Catalysis Journal Issue: 18 Vol. 56; ISSN 1022-5528
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
Similar Records
Study of the deactivation of methanol synthesis catalysts. Final report
Deactivation of Cu/ZnO/Al{sub 2}O{sub 3} methanol synthesis catalyst by sintering
Methanol catalyst deactivation under dual catalytic mode for DME synthesis
Technical Report
·
Mon May 01 00:00:00 EDT 1978
·
OSTI ID:6808917
Deactivation of Cu/ZnO/Al{sub 2}O{sub 3} methanol synthesis catalyst by sintering
Journal Article
·
Fri Oct 01 00:00:00 EDT 1999
· Industrial and Engineering Chemistry Research
·
OSTI ID:20000993
Methanol catalyst deactivation under dual catalytic mode for DME synthesis
Book
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:51929