Application of Algae as Cosubstrate To Enhance the Processability of Willow Wood for Continuous Hydrothermal Liquefaction

Iulia-Maria Sintamarean, Thomas Helmer Pedersen, Xueli Zhao, Andrea Kruse, Lasse Aistrup Rosendahl

Research output: Contribution to journalJournal articleResearchpeer-review

9 Citations (Scopus)
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Abstract

This work proposes a novel strategy to improve the continuous processing of wood slurries in hydrothermal liquefaction systems by coprocessing with algae. Of all algae tested, brown seaweeds and microalgae perform best in preventing slurries dewatering, the main reason for pumpability issues with wood slurries. Rheological tests (viscosity–shear rate profile) indicate that the addition of these two algae to the wood slurry causes the highest increase in viscosity, which coincides with improved wood slurries stability and pumpability. Hydrothermal liquefaction of wood-algae slurries at 400 °C and 15 min in 10 mL tubular batch reactors shows that macroalgae slightly decrease the biocrude yield from 28.5 to 21.6–25.5 wt %, while microalgae increase the biocrude yield by more than 40% relative to pure wood liquefaction due to the lower biocrude yields from macroalgae carbohydrates and higher fractions of lipids and proteins in microalgae. Another benefit of microalgae addition is that the total biomass loading and the organic mass fraction of the slurry can be increased by 100% and 90%, respectively. Therefore, when coprocessed with wood, microalgae can improve the wood feedstock pumpability, biomass loading, organic matter, and biocrude yield.
Original languageEnglish
JournalIndustrial & Engineering Chemistry Research
Volume56
Issue number15
Pages (from-to)4562-4571
Number of pages10
ISSN0888-5885
DOIs
Publication statusPublished - Mar 2017

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Salix
Liquefaction
Algae
Wood
Slurries
Biomass
Seaweed
Dewatering
Batch reactors
Carbohydrates
Biological materials
Feedstocks
Lipids
Viscosity
Proteins

Cite this

@article{d5cda81a983f4f70a1cec95320d24aa9,
title = "Application of Algae as Cosubstrate To Enhance the Processability of Willow Wood for Continuous Hydrothermal Liquefaction",
abstract = "This work proposes a novel strategy to improve the continuous processing of wood slurries in hydrothermal liquefaction systems by coprocessing with algae. Of all algae tested, brown seaweeds and microalgae perform best in preventing slurries dewatering, the main reason for pumpability issues with wood slurries. Rheological tests (viscosity–shear rate profile) indicate that the addition of these two algae to the wood slurry causes the highest increase in viscosity, which coincides with improved wood slurries stability and pumpability. Hydrothermal liquefaction of wood-algae slurries at 400 °C and 15 min in 10 mL tubular batch reactors shows that macroalgae slightly decrease the biocrude yield from 28.5 to 21.6–25.5 wt {\%}, while microalgae increase the biocrude yield by more than 40{\%} relative to pure wood liquefaction due to the lower biocrude yields from macroalgae carbohydrates and higher fractions of lipids and proteins in microalgae. Another benefit of microalgae addition is that the total biomass loading and the organic mass fraction of the slurry can be increased by 100{\%} and 90{\%}, respectively. Therefore, when coprocessed with wood, microalgae can improve the wood feedstock pumpability, biomass loading, organic matter, and biocrude yield.",
author = "Iulia-Maria Sintamarean and Pedersen, {Thomas Helmer} and Xueli Zhao and Andrea Kruse and Rosendahl, {Lasse Aistrup}",
year = "2017",
month = "3",
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language = "English",
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pages = "4562--4571",
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publisher = "American Chemical Society",
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Application of Algae as Cosubstrate To Enhance the Processability of Willow Wood for Continuous Hydrothermal Liquefaction. / Sintamarean, Iulia-Maria; Pedersen, Thomas Helmer; Zhao, Xueli; Kruse, Andrea; Rosendahl, Lasse Aistrup.

In: Industrial & Engineering Chemistry Research, Vol. 56, No. 15, 03.2017, p. 4562-4571.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Application of Algae as Cosubstrate To Enhance the Processability of Willow Wood for Continuous Hydrothermal Liquefaction

AU - Sintamarean, Iulia-Maria

AU - Pedersen, Thomas Helmer

AU - Zhao, Xueli

AU - Kruse, Andrea

AU - Rosendahl, Lasse Aistrup

PY - 2017/3

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N2 - This work proposes a novel strategy to improve the continuous processing of wood slurries in hydrothermal liquefaction systems by coprocessing with algae. Of all algae tested, brown seaweeds and microalgae perform best in preventing slurries dewatering, the main reason for pumpability issues with wood slurries. Rheological tests (viscosity–shear rate profile) indicate that the addition of these two algae to the wood slurry causes the highest increase in viscosity, which coincides with improved wood slurries stability and pumpability. Hydrothermal liquefaction of wood-algae slurries at 400 °C and 15 min in 10 mL tubular batch reactors shows that macroalgae slightly decrease the biocrude yield from 28.5 to 21.6–25.5 wt %, while microalgae increase the biocrude yield by more than 40% relative to pure wood liquefaction due to the lower biocrude yields from macroalgae carbohydrates and higher fractions of lipids and proteins in microalgae. Another benefit of microalgae addition is that the total biomass loading and the organic mass fraction of the slurry can be increased by 100% and 90%, respectively. Therefore, when coprocessed with wood, microalgae can improve the wood feedstock pumpability, biomass loading, organic matter, and biocrude yield.

AB - This work proposes a novel strategy to improve the continuous processing of wood slurries in hydrothermal liquefaction systems by coprocessing with algae. Of all algae tested, brown seaweeds and microalgae perform best in preventing slurries dewatering, the main reason for pumpability issues with wood slurries. Rheological tests (viscosity–shear rate profile) indicate that the addition of these two algae to the wood slurry causes the highest increase in viscosity, which coincides with improved wood slurries stability and pumpability. Hydrothermal liquefaction of wood-algae slurries at 400 °C and 15 min in 10 mL tubular batch reactors shows that macroalgae slightly decrease the biocrude yield from 28.5 to 21.6–25.5 wt %, while microalgae increase the biocrude yield by more than 40% relative to pure wood liquefaction due to the lower biocrude yields from macroalgae carbohydrates and higher fractions of lipids and proteins in microalgae. Another benefit of microalgae addition is that the total biomass loading and the organic mass fraction of the slurry can be increased by 100% and 90%, respectively. Therefore, when coprocessed with wood, microalgae can improve the wood feedstock pumpability, biomass loading, organic matter, and biocrude yield.

U2 - 10.1021/acs.iecr.7b00327

DO - 10.1021/acs.iecr.7b00327

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JF - Industrial & Engineering Chemistry Research

SN - 0888-5885

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