Vapor-Phase Stabilization of Biomass Pyrolysis Vapors Using Mixed-Metal Oxide Catalysts
Abstract
Mixed-metal oxides possess a wide range of tunability and show promise for catalytic stabilization of biomass pyrolysis products. For materials derived from layered double hydroxides, understanding the effect of divalent cation species and divalent/trivalent cation stoichiometric ratio on catalytic behavior is critical to their successful implementation. In this study, four mixed-metal oxide catalysts consisting of Al, Zn, and Mg in different stoichiometric ratios were synthesized and tested for ex-situ catalytic fast pyrolysis (CFP) using pine wood as feedstock. The catalytic activity and deactivation behavior of these catalysts were monitored in real-time using a lab-scale pyrolysis reactor and fixed catalyst bed coupled with a molecular beam mass spectrometer (MBMS), and data were analyzed by multivariate statistical approaches. In the comparison between Mg-Al and Zn-Al catalyst materials, we demonstrated that the Mg-Al materials possessed greater quantities of basic sites, which we attributed to their higher surface areas, and they produced upgraded pyrolysis vapors which contained less acids and more deoxygenated aromatic hydrocarbons such as toluene and xylene. However, detrimental impacts on carbon yields were realized via decarbonylation and decarboxylation reactions and coke formation. Given that the primary goals of catalytic upgrading of bio-oil are deoxygenation, reduction of acidity, and high carbon yield,more »
- Authors:
-
- Univ. of Tennessee, Knoxville, TN (United States). Inst. of Agriculture, Center for Renewable Carbon
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1508954
- Alternate Identifier(s):
- OSTI ID: 1843809
- Report Number(s):
- NREL/JA-5100-73766
Journal ID: ISSN 2168-0485
- Grant/Contract Number:
- AC36-08GO28308; EE0006639
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Sustainable Chemistry & Engineering
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 7; Journal ID: ISSN 2168-0485
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; catalytic fast pyrolysis; layered double hydroxide; mixed-metal oxide; principal component analysis; vapor-phase upgrading
Citation Formats
Edmunds, Charles W., Mukarakate, Calvin, Xu, Mengze, Regmi, Yagya N., Hamilton, Choo, Schaidle, Joshua A., Labbé, Nicole, and Chmely, Stephen C. Vapor-Phase Stabilization of Biomass Pyrolysis Vapors Using Mixed-Metal Oxide Catalysts. United States: N. p., 2019.
Web. doi:10.1021/acssuschemeng.9b00649.
Edmunds, Charles W., Mukarakate, Calvin, Xu, Mengze, Regmi, Yagya N., Hamilton, Choo, Schaidle, Joshua A., Labbé, Nicole, & Chmely, Stephen C. Vapor-Phase Stabilization of Biomass Pyrolysis Vapors Using Mixed-Metal Oxide Catalysts. United States. https://doi.org/10.1021/acssuschemeng.9b00649
Edmunds, Charles W., Mukarakate, Calvin, Xu, Mengze, Regmi, Yagya N., Hamilton, Choo, Schaidle, Joshua A., Labbé, Nicole, and Chmely, Stephen C. Wed .
"Vapor-Phase Stabilization of Biomass Pyrolysis Vapors Using Mixed-Metal Oxide Catalysts". United States. https://doi.org/10.1021/acssuschemeng.9b00649. https://www.osti.gov/servlets/purl/1508954.
@article{osti_1508954,
title = {Vapor-Phase Stabilization of Biomass Pyrolysis Vapors Using Mixed-Metal Oxide Catalysts},
author = {Edmunds, Charles W. and Mukarakate, Calvin and Xu, Mengze and Regmi, Yagya N. and Hamilton, Choo and Schaidle, Joshua A. and Labbé, Nicole and Chmely, Stephen C.},
abstractNote = {Mixed-metal oxides possess a wide range of tunability and show promise for catalytic stabilization of biomass pyrolysis products. For materials derived from layered double hydroxides, understanding the effect of divalent cation species and divalent/trivalent cation stoichiometric ratio on catalytic behavior is critical to their successful implementation. In this study, four mixed-metal oxide catalysts consisting of Al, Zn, and Mg in different stoichiometric ratios were synthesized and tested for ex-situ catalytic fast pyrolysis (CFP) using pine wood as feedstock. The catalytic activity and deactivation behavior of these catalysts were monitored in real-time using a lab-scale pyrolysis reactor and fixed catalyst bed coupled with a molecular beam mass spectrometer (MBMS), and data were analyzed by multivariate statistical approaches. In the comparison between Mg-Al and Zn-Al catalyst materials, we demonstrated that the Mg-Al materials possessed greater quantities of basic sites, which we attributed to their higher surface areas, and they produced upgraded pyrolysis vapors which contained less acids and more deoxygenated aromatic hydrocarbons such as toluene and xylene. However, detrimental impacts on carbon yields were realized via decarbonylation and decarboxylation reactions and coke formation. Given that the primary goals of catalytic upgrading of bio-oil are deoxygenation, reduction of acidity, and high carbon yield, these results highlight both promising catalytic effects of mixed-metal oxide materials and opportunities for improvement.},
doi = {10.1021/acssuschemeng.9b00649},
journal = {ACS Sustainable Chemistry & Engineering},
number = 7,
volume = 7,
place = {United States},
year = {Wed Mar 06 00:00:00 EST 2019},
month = {Wed Mar 06 00:00:00 EST 2019}
}
Web of Science
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Works referencing / citing this record:
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