TY - JOUR
T1 - Valorization of slow pyrolysis vapor from biomass waste
T2 - Comparative study on pyrolysis characteristics, evolved gas evaluation, and adsorption effects
AU - Zhu, Xiefei
AU - Luo, Zejun
AU - Zhang, Qiaozhi
AU - He, Mingjing
AU - Tsang, Daniel C.W.
N1 - Funding Information:
This work was supported by the Fundamental Research Funds for the Central Universities, Sun Yat-sen University (23qnpy66) and Hong Kong Environment and Conservation Fund (Project 104/2021). X. Zhu thanks the funding of the Hong Kong Scholar Program (XJ2020022).
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/10
Y1 - 2023/10
N2 - Pyrolysis vapor is an important byproduct in the production of biochar from biomass waste, and its emission may pose potential environmental risks. To achieve green production of biochar and efficient utilization of pyrolysis vapors, a novel strategy is proposed in this study to use pristine biochar as an adsorbent to adsorb the pyrolysis vapors. According to thermogravimetry-Fourier infrared spectroscopy-mass spectrometry evaluation, the evolved vapors mainly consisted of oxygenated compounds, hydrocarbons, CO2, CO, and H2O. With pyrolysis temperature increasing, ethers, phenols, hydrocarbons, acids/ketones, and CO2 were changed in the same direction based on two-dimensional correlation spectroscopy analysis. Moreover, butene, propargyl alcohol, and butane were the most abundant ionic fragments. After adsorbing pyrolysis vapors, the heating value of the biochar increased by a maximum of 3.2 MJ kg−1 with changes of physicochemical properties. This strategy provides a theoretical basis for green preparation of biochar while recovering energy from pyrolysis vapors.
AB - Pyrolysis vapor is an important byproduct in the production of biochar from biomass waste, and its emission may pose potential environmental risks. To achieve green production of biochar and efficient utilization of pyrolysis vapors, a novel strategy is proposed in this study to use pristine biochar as an adsorbent to adsorb the pyrolysis vapors. According to thermogravimetry-Fourier infrared spectroscopy-mass spectrometry evaluation, the evolved vapors mainly consisted of oxygenated compounds, hydrocarbons, CO2, CO, and H2O. With pyrolysis temperature increasing, ethers, phenols, hydrocarbons, acids/ketones, and CO2 were changed in the same direction based on two-dimensional correlation spectroscopy analysis. Moreover, butene, propargyl alcohol, and butane were the most abundant ionic fragments. After adsorbing pyrolysis vapors, the heating value of the biochar increased by a maximum of 3.2 MJ kg−1 with changes of physicochemical properties. This strategy provides a theoretical basis for green preparation of biochar while recovering energy from pyrolysis vapors.
KW - 2D correlation spectroscopy
KW - Biochar production
KW - Carbon utilization
KW - Energy recovery
KW - VOCs removal
UR - http://www.scopus.com/inward/record.url?scp=85165648711&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2023.129543
DO - 10.1016/j.biortech.2023.129543
M3 - Journal article
C2 - 37482202
AN - SCOPUS:85165648711
SN - 0960-8524
VL - 386
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 129543
ER -