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Effect of sequential catalyst regeneration in catalytic fast pyrolysis of biomass

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Abstract
Fast pyrolysis is a thermochemical process that contributes to the conversion of biomass into a variety of fuels and chemicals. The process aims to produce a liquid mixture of organic molecules called bio-oil. To improve the quality of crude bio-oil in relation to biofuel applications, biomass fast pyrolysis can be carried out in the presence of suitable catalysts. Catalyst particles can be introduced to the reactor (in situ) for the removal of oxygen and the catalytic cracking of high molecular weight compounds in the pyrolysis vapours. The primary goal of this work was to investigate the effects of a repeatedly regenerated ZSM-5 based FCC catalyst on the fast pyrolysis product yields (e.g. organics, water, carbonaceous solids and non-condensable gases), non-condensable gas compositions, bio-oil compositions and the elemental distribution over various pyrolysis products and to gain an insight of the underlying mechanisms. Experiments were performed in a newly designed laboratory scale mechanical agitated bed reactor at a fixed reaction temperature of 500 °C. The experimental reproducibility of the setup has been checked by repetition of several non-catalytic and in situ experiments under identical conditions. The catalyst containing bed material obtained from in situ experiments were successively reacted and regenerated (eight cycles performed in total) to observe the effect of catalyst regeneration on the products and on the catalyst itself. Along the reaction/regeneration sequence, the yield of organics increased, while water, carbonaceous solids and non-condensable gases decreased. The trends in the pyrolysis product yields of converging to that of non-catalytic levels were observed which revealed that the influence of the catalyst slowly declined. The main observation was that the catalyst partially loses its activity along the regeneration sequence due to catalyst poisoning by ash components and the degradation of the physical and the chemical structure of the catalyst during several regeneration cycles.
Keywords
FCC, cycle, Bio-oil, regeneration, coke on catalyst, catalytic fast pyrolysis, ZSM-5, pine wood

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MLA
Yildiz, Güray, Tom Lathouwers, Hilal Ezgi Toraman, et al. “Effect of Sequential Catalyst Regeneration in Catalytic Fast Pyrolysis of Biomass.” Analytical and Applied Pyrolysis, 20th International Symposium, Conference Guide and Abstracts. 2014. 129–129. Print.
APA
Yildiz, Güray, Lathouwers, T., Toraman, H. E., Van Geem, K., Ronsse, F., van Duren, R., Kersten, S. R., et al. (2014). Effect of sequential catalyst regeneration in catalytic fast pyrolysis of biomass. Analytical and Applied Pyrolysis, 20th International symposium, Conference guide and abstracts (pp. 129–129). Presented at the 20th International symposium on Analytical and Applied Pyrolysis (PYRO 2014).
Chicago author-date
Yildiz, Güray, Tom Lathouwers, Hilal Ezgi Toraman, Kevin Van Geem, Frederik Ronsse, Ruben van Duren, Sascha RA Kersten, and Wolter Prins. 2014. “Effect of Sequential Catalyst Regeneration in Catalytic Fast Pyrolysis of Biomass.” In Analytical and Applied Pyrolysis, 20th International Symposium, Conference Guide and Abstracts, 129–129.
Chicago author-date (all authors)
Yildiz, Güray, Tom Lathouwers, Hilal Ezgi Toraman, Kevin Van Geem, Frederik Ronsse, Ruben van Duren, Sascha RA Kersten, and Wolter Prins. 2014. “Effect of Sequential Catalyst Regeneration in Catalytic Fast Pyrolysis of Biomass.” In Analytical and Applied Pyrolysis, 20th International Symposium, Conference Guide and Abstracts, 129–129.
Vancouver
1.
Yildiz G, Lathouwers T, Toraman HE, Van Geem K, Ronsse F, van Duren R, et al. Effect of sequential catalyst regeneration in catalytic fast pyrolysis of biomass. Analytical and Applied Pyrolysis, 20th International symposium, Conference guide and abstracts. 2014. p. 129–129.
IEEE
[1]
G. Yildiz et al., “Effect of sequential catalyst regeneration in catalytic fast pyrolysis of biomass,” in Analytical and Applied Pyrolysis, 20th International symposium, Conference guide and abstracts, Birmingham, UK, 2014, pp. 129–129.
@inproceedings{4405487,
  abstract     = {Fast pyrolysis is a thermochemical process that contributes to the conversion of biomass into a variety of fuels and chemicals. The process aims to produce a liquid mixture of organic molecules called bio-oil. To improve the quality of crude bio-oil in relation to biofuel applications, biomass fast pyrolysis can be carried out in the presence of suitable catalysts. Catalyst particles can be introduced to the reactor (in situ) for the removal of oxygen and the catalytic cracking of high molecular weight compounds in the pyrolysis vapours. 
The primary goal of this work was to investigate the effects of a repeatedly regenerated ZSM-5 based FCC catalyst on the fast pyrolysis product yields (e.g. organics, water, carbonaceous solids and non-condensable gases), non-condensable gas compositions, bio-oil compositions and the elemental distribution over various pyrolysis products and to gain an insight of the underlying mechanisms. Experiments were performed in a newly designed laboratory scale mechanical agitated bed reactor at a fixed reaction temperature of 500 °C. The experimental reproducibility of the setup has been checked by repetition of several non-catalytic and in situ experiments under identical conditions. 
The catalyst containing bed material obtained from in situ experiments were successively reacted and regenerated (eight cycles performed in total) to observe the effect of catalyst regeneration on the products and on the catalyst itself. Along the reaction/regeneration sequence, the yield of organics increased, while water, carbonaceous solids and non-condensable gases decreased. The trends in the pyrolysis product yields of converging to that of non-catalytic levels were observed which revealed that the influence of the catalyst slowly declined. The main observation was that the catalyst partially loses its activity along the regeneration sequence due to catalyst poisoning by ash components and the degradation of the physical and the chemical structure of the catalyst during several regeneration cycles.},
  author       = {Yildiz, Güray and Lathouwers, Tom and Toraman, Hilal Ezgi and Van Geem, Kevin and Ronsse, Frederik and van Duren, Ruben and Kersten, Sascha RA and Prins, Wolter},
  booktitle    = {Analytical and Applied Pyrolysis, 20th International symposium, Conference guide and abstracts},
  isbn         = {9785906376060},
  keywords     = {FCC,cycle,Bio-oil,regeneration,coke on catalyst,catalytic fast pyrolysis,ZSM-5,pine wood},
  language     = {eng},
  location     = {Birmingham, UK},
  pages        = {129--129},
  title        = {Effect of sequential catalyst regeneration in catalytic fast pyrolysis of biomass},
  year         = {2014},
}