TY - JOUR
T1 - Fate of biomass inorganic elements during hydrothermal carbonization: an experimental study on agro-food waste
AU - Michel, Julie
AU - Rivas Arrieta, Maria Jose
AU - Boren, Eleonora
AU - Simonin, Loïc
AU - Kennedy, Maria
AU - Dupont, Capucine
PY - 2023/11/23
Y1 - 2023/11/23
N2 - The distribution of inorganic elements between solid and liquid phases during biomass hydrothermal carbonization (HTC) is a poorly investigated topic despite its importance for process optimization. To fill in this gap, the distribution of inorganic elements and their forms were determined for three agro-food waste feedstocks converted at HTC temperatures of 180, 220, and 260 °C in 12 h. Satisfactory balances were achieved, with values between 80 and 92% for C and N, and 80 and 110% for most inorganic elements. At 180 °C, over 90% of P, Mg, Ca, K, Na, and Mn were removed from hydrochars whatever feedstock. At higher temperatures, P, Mg, Ca, and Mn were partly reincorporated into hydrochars (between 7 and 53%), possibly due to the formation of insoluble precipitates, while K and Na remained in the liquid. On the opposite, some minor elements, Cu and Al, remained in the hydrochars, whatever temperature. Si showed different removal behaviors according to feedstock and temperature. These results show the possibility of optimizing the removal of inorganic elements from hydrochars using different temperatures.
AB - The distribution of inorganic elements between solid and liquid phases during biomass hydrothermal carbonization (HTC) is a poorly investigated topic despite its importance for process optimization. To fill in this gap, the distribution of inorganic elements and their forms were determined for three agro-food waste feedstocks converted at HTC temperatures of 180, 220, and 260 °C in 12 h. Satisfactory balances were achieved, with values between 80 and 92% for C and N, and 80 and 110% for most inorganic elements. At 180 °C, over 90% of P, Mg, Ca, K, Na, and Mn were removed from hydrochars whatever feedstock. At higher temperatures, P, Mg, Ca, and Mn were partly reincorporated into hydrochars (between 7 and 53%), possibly due to the formation of insoluble precipitates, while K and Na remained in the liquid. On the opposite, some minor elements, Cu and Al, remained in the hydrochars, whatever temperature. Si showed different removal behaviors according to feedstock and temperature. These results show the possibility of optimizing the removal of inorganic elements from hydrochars using different temperatures.
KW - Biochar
KW - Biomass
KW - Elemental balances
KW - Hydrothermal carbonization
KW - Inorganic elements
KW - Waste
UR - http://www.scopus.com/inward/record.url?scp=85177557299&partnerID=8YFLogxK
U2 - 10.1007/s13399-023-05105-9
DO - 10.1007/s13399-023-05105-9
M3 - Journal article
SN - 2190-6815
JO - Biomass Conversion and Biorefinery
JF - Biomass Conversion and Biorefinery
ER -