Reduction of inorganics from macroalgae Laminaria digitata and spent mushroom compost (SMC) by acid leaching and selective hydrothermal liquefaction

Saqib Sohail Toor, Lukas Jasiunas, Chunbao (Charles) Xu, Iulia-Maria Sintamarean, Donghong Yu, Asbjørn Haaning Nielsen, Lasse Aistrup Rosendahl

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Resumé

Hydrothermal liquefaction (HTL) is a promising route for producing bio-crude from various biomass feedstocks. However, high content of inorganic constituents in biomass like macroalgae Laminaria digitata and spent mushroom compost (SMC) affect the conversion process and the resulting fuel products. This research studied the effects of different acid leaching treatments on such feedstocks, subsequent HTL, and bio-crude properties. Leaching treatments were performed using five different agents: deionized water, acetic acid, citric acid, sulfuric acid, and hydrochloric acid. Performance of leaching was evaluated by analyzing both leached biomass and HTL products by elemental analysis, ash content, inductively coupled plasma (ICP) analysis, and X-ray diffraction (XRD) analysis. Catalytic and non-catalytic HTL of both feedstocks before and after treatment were performed in a 10-mL microreactor at 400 °C with a holding time of 15 min and pressures of 27–30 MPa. For macroalgae, sulfuric acid and hydrochloric acid were found the most effective in reducing the ash content from 30.42 to 20.45 and 20.87%, respectively, followed by acetic and citric acid treatment that could reduce the ash content to 21.5 and 22.15%, respectively. Similarly for SMC, citric acid and acetic acid were found the most effective in reducing the ash content from 50.34 to 37.04 and 39.94%, respectively. Citric acid did not show significant leaching of organic components such as carbohydrates and proteins and represented a less toxic and hazardous option for the leaching. The results from HTL of untreated and citric acid-treated biomass showed that the acid leaching resulted in an increase in bio-crude yields from 20.7 to 29.2% (dry ash-free basis) for macroalgae and from 22.9 to 25.1% for SMC.
OriginalsprogEngelsk
TidsskriftBiomass Conversion and Biorefinery
Vol/bind8
Udgave nummer2
Sider (fra-til)369-377
Antal sider9
ISSN2190-6815
DOI
StatusUdgivet - jun. 2018

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Ashes
Liquefaction
Citric acid
Leaching
Acids
Biomass
Acetic acid
Feedstocks
Hydrochloric acid
Sulfuric acid
Deionized water
Inductively coupled plasma
Carbohydrates
X ray diffraction analysis
Proteins

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@article{b447a6fb45eb48c68737099e467c0680,
title = "Reduction of inorganics from macroalgae Laminaria digitata and spent mushroom compost (SMC) by acid leaching and selective hydrothermal liquefaction",
abstract = "Hydrothermal liquefaction (HTL) is a promising route for producing bio-crude from various biomass feedstocks. However, high content of inorganic constituents in biomass like macroalgae Laminaria digitata and spent mushroom compost (SMC) affect the conversion process and the resulting fuel products. This research studied the effects of different acid leaching treatments on such feedstocks, subsequent HTL, and bio-crude properties. Leaching treatments were performed using five different agents: deionized water, acetic acid, citric acid, sulfuric acid, and hydrochloric acid. Performance of leaching was evaluated by analyzing both leached biomass and HTL products by elemental analysis, ash content, inductively coupled plasma (ICP) analysis, and X-ray diffraction (XRD) analysis. Catalytic and non-catalytic HTL of both feedstocks before and after treatment were performed in a 10-mL microreactor at 400 °C with a holding time of 15 min and pressures of 27–30 MPa. For macroalgae, sulfuric acid and hydrochloric acid were found the most effective in reducing the ash content from 30.42 to 20.45 and 20.87{\%}, respectively, followed by acetic and citric acid treatment that could reduce the ash content to 21.5 and 22.15{\%}, respectively. Similarly for SMC, citric acid and acetic acid were found the most effective in reducing the ash content from 50.34 to 37.04 and 39.94{\%}, respectively. Citric acid did not show significant leaching of organic components such as carbohydrates and proteins and represented a less toxic and hazardous option for the leaching. The results from HTL of untreated and citric acid-treated biomass showed that the acid leaching resulted in an increase in bio-crude yields from 20.7 to 29.2{\%} (dry ash-free basis) for macroalgae and from 22.9 to 25.1{\%} for SMC.",
keywords = "Hydrothermal liquefaction, Inorganic constituents, Ash content, Acid leaching, Bio-crude",
author = "Toor, {Saqib Sohail} and Lukas Jasiunas and Xu, {Chunbao (Charles)} and Iulia-Maria Sintamarean and Donghong Yu and Nielsen, {Asbj{\o}rn Haaning} and Rosendahl, {Lasse Aistrup}",
year = "2018",
month = "6",
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language = "English",
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pages = "369--377",
journal = "Biomass Conversion and Biorefinery",
issn = "2190-6815",
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number = "2",

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Reduction of inorganics from macroalgae Laminaria digitata and spent mushroom compost (SMC) by acid leaching and selective hydrothermal liquefaction. / Toor, Saqib Sohail; Jasiunas, Lukas; Xu, Chunbao (Charles); Sintamarean, Iulia-Maria; Yu, Donghong; Nielsen, Asbjørn Haaning; Rosendahl, Lasse Aistrup.

I: Biomass Conversion and Biorefinery, Bind 8, Nr. 2, 06.2018, s. 369-377.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Reduction of inorganics from macroalgae Laminaria digitata and spent mushroom compost (SMC) by acid leaching and selective hydrothermal liquefaction

AU - Toor, Saqib Sohail

AU - Jasiunas, Lukas

AU - Xu, Chunbao (Charles)

AU - Sintamarean, Iulia-Maria

AU - Yu, Donghong

AU - Nielsen, Asbjørn Haaning

AU - Rosendahl, Lasse Aistrup

PY - 2018/6

Y1 - 2018/6

N2 - Hydrothermal liquefaction (HTL) is a promising route for producing bio-crude from various biomass feedstocks. However, high content of inorganic constituents in biomass like macroalgae Laminaria digitata and spent mushroom compost (SMC) affect the conversion process and the resulting fuel products. This research studied the effects of different acid leaching treatments on such feedstocks, subsequent HTL, and bio-crude properties. Leaching treatments were performed using five different agents: deionized water, acetic acid, citric acid, sulfuric acid, and hydrochloric acid. Performance of leaching was evaluated by analyzing both leached biomass and HTL products by elemental analysis, ash content, inductively coupled plasma (ICP) analysis, and X-ray diffraction (XRD) analysis. Catalytic and non-catalytic HTL of both feedstocks before and after treatment were performed in a 10-mL microreactor at 400 °C with a holding time of 15 min and pressures of 27–30 MPa. For macroalgae, sulfuric acid and hydrochloric acid were found the most effective in reducing the ash content from 30.42 to 20.45 and 20.87%, respectively, followed by acetic and citric acid treatment that could reduce the ash content to 21.5 and 22.15%, respectively. Similarly for SMC, citric acid and acetic acid were found the most effective in reducing the ash content from 50.34 to 37.04 and 39.94%, respectively. Citric acid did not show significant leaching of organic components such as carbohydrates and proteins and represented a less toxic and hazardous option for the leaching. The results from HTL of untreated and citric acid-treated biomass showed that the acid leaching resulted in an increase in bio-crude yields from 20.7 to 29.2% (dry ash-free basis) for macroalgae and from 22.9 to 25.1% for SMC.

AB - Hydrothermal liquefaction (HTL) is a promising route for producing bio-crude from various biomass feedstocks. However, high content of inorganic constituents in biomass like macroalgae Laminaria digitata and spent mushroom compost (SMC) affect the conversion process and the resulting fuel products. This research studied the effects of different acid leaching treatments on such feedstocks, subsequent HTL, and bio-crude properties. Leaching treatments were performed using five different agents: deionized water, acetic acid, citric acid, sulfuric acid, and hydrochloric acid. Performance of leaching was evaluated by analyzing both leached biomass and HTL products by elemental analysis, ash content, inductively coupled plasma (ICP) analysis, and X-ray diffraction (XRD) analysis. Catalytic and non-catalytic HTL of both feedstocks before and after treatment were performed in a 10-mL microreactor at 400 °C with a holding time of 15 min and pressures of 27–30 MPa. For macroalgae, sulfuric acid and hydrochloric acid were found the most effective in reducing the ash content from 30.42 to 20.45 and 20.87%, respectively, followed by acetic and citric acid treatment that could reduce the ash content to 21.5 and 22.15%, respectively. Similarly for SMC, citric acid and acetic acid were found the most effective in reducing the ash content from 50.34 to 37.04 and 39.94%, respectively. Citric acid did not show significant leaching of organic components such as carbohydrates and proteins and represented a less toxic and hazardous option for the leaching. The results from HTL of untreated and citric acid-treated biomass showed that the acid leaching resulted in an increase in bio-crude yields from 20.7 to 29.2% (dry ash-free basis) for macroalgae and from 22.9 to 25.1% for SMC.

KW - Hydrothermal liquefaction

KW - Inorganic constituents

KW - Ash content

KW - Acid leaching

KW - Bio-crude

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U2 - 10.1007/s13399-017-0290-6

DO - 10.1007/s13399-017-0290-6

M3 - Journal article

VL - 8

SP - 369

EP - 377

JO - Biomass Conversion and Biorefinery

JF - Biomass Conversion and Biorefinery

SN - 2190-6815

IS - 2

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