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Biomass fast pyrolysis in an innovative gas-solid vortex reactor : experimental proof of concept

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Abstract
Biomass fast pyrolysis has been considered one of the best alternatives for the thermal conversion of biomass into bio-oil. This work introduces a new reactor technology for biomass fast pyrolysis, the Gas-Solid Vortex Reactor (GSVR), to obtain high bio-oil yields. The GSVR was designed to decrease the residence time of the pyrolysis vapors; thus, the secondary cracking reactions are reduced, to enhance the segregation of the char and the unreacted biomass and to improve the heat transfer rate. Biomass fast pyrolysis experiments have been carried out for the first time in a Gas-Solid Vortex Reactor (GSVR) at 773 K, using softwood (pine) and hardwood (poplar) as feedstock. Char yields as low as 10 wt. % in the GSVR were comparable to those reported for the same feedstocks processed in conventional fluidized bed reactors. The yields of non-condensable gases in the range of 15-17 wt. % were significantly lower than those reported for other commonly used biomass fast pyrolysis reactors. Two-dimensional gas chromatography (GC x GC) revealed noticeable differences at the molecular level between the bio-oils from the GSVR and bio-oils from other reactors. The aromatics in the pine bio-oil consist almost entirely (85 wt. %) of guaiacols. For poplar bio-oils no predominant group of aromatics was found, but phenolics, syringols, and catechols were the most pronounced. The experimental results highlight the advantages of the GSVR for biomass pyrolysis, reaching stable operation in around 60 s, removing the formed char selectively during operation, and enabling fast entrainment of pyrolysis vapors. Results indicate a great potential for increasing yield and selectivity towards guaiacols in softwood (e.g., pine) bio-oil. Likewise, decreasing pyrolysis temperature could increase the yield of guaiacols and syringols in hardwood (e.g., poplar) bio-oil.
Keywords
General Chemistry, General Chemical Engineering, Biomass, Pyrolysis, Gas-Solid Vortex Reactor, Process intensification, FLUIDIZED-BEDS, BIO-OIL, PROCESS INTENSIFICATION, LIGNIN, POPLAR, MECHANISM, PINE, BIOSYNTHESIS, TEMPERATURES, CONVERSION

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MLA
Nunez Manzano, Manuel, et al. “Biomass Fast Pyrolysis in an Innovative Gas-Solid Vortex Reactor : Experimental Proof of Concept.” JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, vol. 156, 2021, doi:10.1016/j.jaap.2021.105165.
APA
Nunez Manzano, M., Gonzalez Quiroga, A., Perreault, P., Madanikashani, S., Vandewalle, L., Marin, G., … Van Geem, K. (2021). Biomass fast pyrolysis in an innovative gas-solid vortex reactor : experimental proof of concept. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 156. https://doi.org/10.1016/j.jaap.2021.105165
Chicago author-date
Nunez Manzano, Manuel, Arturo Gonzalez Quiroga, Patrice Perreault, Sepehr Madanikashani, Laurien Vandewalle, Guy Marin, Geraldine Heynderickx, and Kevin Van Geem. 2021. “Biomass Fast Pyrolysis in an Innovative Gas-Solid Vortex Reactor : Experimental Proof of Concept.” JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 156. https://doi.org/10.1016/j.jaap.2021.105165.
Chicago author-date (all authors)
Nunez Manzano, Manuel, Arturo Gonzalez Quiroga, Patrice Perreault, Sepehr Madanikashani, Laurien Vandewalle, Guy Marin, Geraldine Heynderickx, and Kevin Van Geem. 2021. “Biomass Fast Pyrolysis in an Innovative Gas-Solid Vortex Reactor : Experimental Proof of Concept.” JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 156. doi:10.1016/j.jaap.2021.105165.
Vancouver
1.
Nunez Manzano M, Gonzalez Quiroga A, Perreault P, Madanikashani S, Vandewalle L, Marin G, et al. Biomass fast pyrolysis in an innovative gas-solid vortex reactor : experimental proof of concept. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS. 2021;156.
IEEE
[1]
M. Nunez Manzano et al., “Biomass fast pyrolysis in an innovative gas-solid vortex reactor : experimental proof of concept,” JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, vol. 156, 2021.
@article{8706553,
  abstract     = {{Biomass fast pyrolysis has been considered one of the best alternatives for the thermal conversion of biomass into bio-oil. This work introduces a new reactor technology for biomass fast pyrolysis, the Gas-Solid Vortex Reactor (GSVR), to obtain high bio-oil yields. The GSVR was designed to decrease the residence time of the pyrolysis vapors; thus, the secondary cracking reactions are reduced, to enhance the segregation of the char and the unreacted biomass and to improve the heat transfer rate. Biomass fast pyrolysis experiments have been carried out for the first time in a Gas-Solid Vortex Reactor (GSVR) at 773 K, using softwood (pine) and hardwood (poplar) as feedstock. Char yields as low as 10 wt. % in the GSVR were comparable to those reported for the same feedstocks processed in conventional fluidized bed reactors. The yields of non-condensable gases in the range of 15-17 wt. % were significantly lower than those reported for other commonly used biomass fast pyrolysis reactors. Two-dimensional gas chromatography (GC x GC) revealed noticeable differences at the molecular level between the bio-oils from the GSVR and bio-oils from other reactors. The aromatics in the pine bio-oil consist almost entirely (85 wt. %) of guaiacols. For poplar bio-oils no predominant group of aromatics was found, but phenolics, syringols, and catechols were the most pronounced. The experimental results highlight the advantages of the GSVR for biomass pyrolysis, reaching stable operation in around 60 s, removing the formed char selectively during operation, and enabling fast entrainment of pyrolysis vapors. Results indicate a great potential for increasing yield and selectivity towards guaiacols in softwood (e.g., pine) bio-oil. Likewise, decreasing pyrolysis temperature could increase the yield of guaiacols and syringols in hardwood (e.g., poplar) bio-oil.}},
  articleno    = {{105165}},
  author       = {{Nunez Manzano, Manuel and Gonzalez Quiroga, Arturo and Perreault, Patrice and Madanikashani, Sepehr and Vandewalle, Laurien and Marin, Guy and Heynderickx, Geraldine and Van Geem, Kevin}},
  issn         = {{0165-2370}},
  journal      = {{JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS}},
  keywords     = {{General Chemistry,General Chemical Engineering,Biomass,Pyrolysis,Gas-Solid Vortex Reactor,Process intensification,FLUIDIZED-BEDS,BIO-OIL,PROCESS INTENSIFICATION,LIGNIN,POPLAR,MECHANISM,PINE,BIOSYNTHESIS,TEMPERATURES,CONVERSION}},
  language     = {{eng}},
  pages        = {{12}},
  title        = {{Biomass fast pyrolysis in an innovative gas-solid vortex reactor : experimental proof of concept}},
  url          = {{http://dx.doi.org/10.1016/j.jaap.2021.105165}},
  volume       = {{156}},
  year         = {{2021}},
}

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