Experiences from an extended catalytic fast pyrolysis production run

Ville Paasikallio, Christian Lindfors, Eeva Kuoppala, Yrjö Solantausta, Anja Oasmaa

Research output: Contribution to conferenceOther conference contributionScientific

Abstract

In this work, a continuous four day catalytic fast pyrolysis experiment was carried out in VTT's Process Development Unit (PDU) using pine sawdust and a spray dried HZSM-5 catalyst. The PDU employs circulating fluidized bed technology with online catalyst regeneration. Approximately 250 kg of pyrolysis oil were produced, along with 600 kg of aqueous side products. On average, the carbon content of the pyrolysis oil was 72 wt. %, and the oxygen content 22 wt. %. The pyrolysis oil contained 24 % of the original biomass carbon, whereas 14 % were present in the aqueous fraction. The catalytically produced pyrolysis oil contained mostly water-insoluble compounds, i.e. lignin-derived material and some aromatic hydrocarbons, while majority of the polar oxygenates from cellulose and hemicellulose concentrated in the aqueous fraction. The elemental composition of the pyrolysis oil remained quite stable during the four day experiment. Clear changes were, however, observed in the properties and behavior of the catalyst. Coke formation decreased over time, as did the surface area and porosity of the catalyst. This was accompanied by a loss of crystallinity and changes in the catalyst structure. Biomass alkali metals (Ca, K, Mg and P) also deposited on the catalyst, and the overall alkali content of the catalyst reached 1.1 wt. % at the end of the experiment. A linear correlation between catalyst alkali metal content and acidity was observed, which suggested possible substitution of HZSM-5 proton sites with biomass alkalis.
Original languageEnglish
Publication statusPublished - 2014
EventSymposium on Thermal and Catalytic Sciences for Biofuels and Biobased Products, TCS2014 - Denver, United States
Duration: 2 Sep 20145 Sep 2014

Conference

ConferenceSymposium on Thermal and Catalytic Sciences for Biofuels and Biobased Products, TCS2014
Abbreviated titleTCS2014
CountryUnited States
CityDenver
Period2/09/145/09/14

Fingerprint

Pyrolysis
Catalysts
Biomass
Alkali metals
Catalyst regeneration
Sawdust
Carbon
Aromatic hydrocarbons
Experiments
Lignin
Acidity
Coke
Fluidized beds
Cellulose
Protons
Substitution reactions
Porosity
Oils
Oxygen
Chemical analysis

Cite this

Paasikallio, V., Lindfors, C., Kuoppala, E., Solantausta, Y., & Oasmaa, A. (2014). Experiences from an extended catalytic fast pyrolysis production run. Symposium on Thermal and Catalytic Sciences for Biofuels and Biobased Products, TCS2014, Denver, United States.
Paasikallio, Ville ; Lindfors, Christian ; Kuoppala, Eeva ; Solantausta, Yrjö ; Oasmaa, Anja. / Experiences from an extended catalytic fast pyrolysis production run. Symposium on Thermal and Catalytic Sciences for Biofuels and Biobased Products, TCS2014, Denver, United States.
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title = "Experiences from an extended catalytic fast pyrolysis production run",
abstract = "In this work, a continuous four day catalytic fast pyrolysis experiment was carried out in VTT's Process Development Unit (PDU) using pine sawdust and a spray dried HZSM-5 catalyst. The PDU employs circulating fluidized bed technology with online catalyst regeneration. Approximately 250 kg of pyrolysis oil were produced, along with 600 kg of aqueous side products. On average, the carbon content of the pyrolysis oil was 72 wt. {\%}, and the oxygen content 22 wt. {\%}. The pyrolysis oil contained 24 {\%} of the original biomass carbon, whereas 14 {\%} were present in the aqueous fraction. The catalytically produced pyrolysis oil contained mostly water-insoluble compounds, i.e. lignin-derived material and some aromatic hydrocarbons, while majority of the polar oxygenates from cellulose and hemicellulose concentrated in the aqueous fraction. The elemental composition of the pyrolysis oil remained quite stable during the four day experiment. Clear changes were, however, observed in the properties and behavior of the catalyst. Coke formation decreased over time, as did the surface area and porosity of the catalyst. This was accompanied by a loss of crystallinity and changes in the catalyst structure. Biomass alkali metals (Ca, K, Mg and P) also deposited on the catalyst, and the overall alkali content of the catalyst reached 1.1 wt. {\%} at the end of the experiment. A linear correlation between catalyst alkali metal content and acidity was observed, which suggested possible substitution of HZSM-5 proton sites with biomass alkalis.",
author = "Ville Paasikallio and Christian Lindfors and Eeva Kuoppala and Yrj{\"o} Solantausta and Anja Oasmaa",
note = "Project: 77003; Symposium on Thermal and Catalytic Sciences for Biofuels and Biobased Products, TCS2014, TCS2014 ; Conference date: 02-09-2014 Through 05-09-2014",
year = "2014",
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}

Paasikallio, V, Lindfors, C, Kuoppala, E, Solantausta, Y & Oasmaa, A 2014, 'Experiences from an extended catalytic fast pyrolysis production run' Symposium on Thermal and Catalytic Sciences for Biofuels and Biobased Products, TCS2014, Denver, United States, 2/09/14 - 5/09/14, .

Experiences from an extended catalytic fast pyrolysis production run. / Paasikallio, Ville; Lindfors, Christian; Kuoppala, Eeva; Solantausta, Yrjö; Oasmaa, Anja.

2014. Symposium on Thermal and Catalytic Sciences for Biofuels and Biobased Products, TCS2014, Denver, United States.

Research output: Contribution to conferenceOther conference contributionScientific

TY - CONF

T1 - Experiences from an extended catalytic fast pyrolysis production run

AU - Paasikallio, Ville

AU - Lindfors, Christian

AU - Kuoppala, Eeva

AU - Solantausta, Yrjö

AU - Oasmaa, Anja

N1 - Project: 77003

PY - 2014

Y1 - 2014

N2 - In this work, a continuous four day catalytic fast pyrolysis experiment was carried out in VTT's Process Development Unit (PDU) using pine sawdust and a spray dried HZSM-5 catalyst. The PDU employs circulating fluidized bed technology with online catalyst regeneration. Approximately 250 kg of pyrolysis oil were produced, along with 600 kg of aqueous side products. On average, the carbon content of the pyrolysis oil was 72 wt. %, and the oxygen content 22 wt. %. The pyrolysis oil contained 24 % of the original biomass carbon, whereas 14 % were present in the aqueous fraction. The catalytically produced pyrolysis oil contained mostly water-insoluble compounds, i.e. lignin-derived material and some aromatic hydrocarbons, while majority of the polar oxygenates from cellulose and hemicellulose concentrated in the aqueous fraction. The elemental composition of the pyrolysis oil remained quite stable during the four day experiment. Clear changes were, however, observed in the properties and behavior of the catalyst. Coke formation decreased over time, as did the surface area and porosity of the catalyst. This was accompanied by a loss of crystallinity and changes in the catalyst structure. Biomass alkali metals (Ca, K, Mg and P) also deposited on the catalyst, and the overall alkali content of the catalyst reached 1.1 wt. % at the end of the experiment. A linear correlation between catalyst alkali metal content and acidity was observed, which suggested possible substitution of HZSM-5 proton sites with biomass alkalis.

AB - In this work, a continuous four day catalytic fast pyrolysis experiment was carried out in VTT's Process Development Unit (PDU) using pine sawdust and a spray dried HZSM-5 catalyst. The PDU employs circulating fluidized bed technology with online catalyst regeneration. Approximately 250 kg of pyrolysis oil were produced, along with 600 kg of aqueous side products. On average, the carbon content of the pyrolysis oil was 72 wt. %, and the oxygen content 22 wt. %. The pyrolysis oil contained 24 % of the original biomass carbon, whereas 14 % were present in the aqueous fraction. The catalytically produced pyrolysis oil contained mostly water-insoluble compounds, i.e. lignin-derived material and some aromatic hydrocarbons, while majority of the polar oxygenates from cellulose and hemicellulose concentrated in the aqueous fraction. The elemental composition of the pyrolysis oil remained quite stable during the four day experiment. Clear changes were, however, observed in the properties and behavior of the catalyst. Coke formation decreased over time, as did the surface area and porosity of the catalyst. This was accompanied by a loss of crystallinity and changes in the catalyst structure. Biomass alkali metals (Ca, K, Mg and P) also deposited on the catalyst, and the overall alkali content of the catalyst reached 1.1 wt. % at the end of the experiment. A linear correlation between catalyst alkali metal content and acidity was observed, which suggested possible substitution of HZSM-5 proton sites with biomass alkalis.

M3 - Other conference contribution

ER -

Paasikallio V, Lindfors C, Kuoppala E, Solantausta Y, Oasmaa A. Experiences from an extended catalytic fast pyrolysis production run. 2014. Symposium on Thermal and Catalytic Sciences for Biofuels and Biobased Products, TCS2014, Denver, United States.