TY - JOUR
T1 - Comparative study on various alcohols solvolysis of organosolv lignin using microwave energy
T2 - Physicochemical and morphological properties
AU - Duan, Dengle
AU - Wang, Yunpu
AU - Ruan, Roger
AU - Tayier, Maimaitiaili
AU - Dai, Leilei
AU - Zhao, Yunfeng
AU - Zhou, Yue
AU - Liu, Yuhuan
PY - 2018/4
Y1 - 2018/4
N2 - Solvolysis approach is an efficient pathway to covert solid biomass into different end products since it can provide a mild environment and a single-phase condition. A comparative study on various alcohols-assisted liquefaction of lignin has been carried out using sulfuric acid as catalyst under microwave condition. Methanol and ethanol showed a higher conversion rate compared to other alcohols. Both liquefied products and residues have been investigated using gel permeation chromatography–high-performance liquid chromatography (GPC–HPLC), Fourier transform infrared (FT-IR), Scanning electron microscopy (SEM) and Thermogravimetric (TG) analysis. The results showed that methanol and ethanol as solvents achieved a higher conversion rate, meantime, the molecular weight of liquefied products was dramatically lower than those of other alcohols. The FT-IR indicated that there were obvious differences in the contents of carbonyl, methyl and hydroxyl group in the liquefied products with various alcohols as solvents. The solid residue exhibited a big difference in microstructure morphology after depolymerization, in addition, the resulted solid residue from methanol solvents showed a higher thermal stability and char yield, which can be used as a fire retardant in composite materials.
AB - Solvolysis approach is an efficient pathway to covert solid biomass into different end products since it can provide a mild environment and a single-phase condition. A comparative study on various alcohols-assisted liquefaction of lignin has been carried out using sulfuric acid as catalyst under microwave condition. Methanol and ethanol showed a higher conversion rate compared to other alcohols. Both liquefied products and residues have been investigated using gel permeation chromatography–high-performance liquid chromatography (GPC–HPLC), Fourier transform infrared (FT-IR), Scanning electron microscopy (SEM) and Thermogravimetric (TG) analysis. The results showed that methanol and ethanol as solvents achieved a higher conversion rate, meantime, the molecular weight of liquefied products was dramatically lower than those of other alcohols. The FT-IR indicated that there were obvious differences in the contents of carbonyl, methyl and hydroxyl group in the liquefied products with various alcohols as solvents. The solid residue exhibited a big difference in microstructure morphology after depolymerization, in addition, the resulted solid residue from methanol solvents showed a higher thermal stability and char yield, which can be used as a fire retardant in composite materials.
KW - Alcohols
KW - Depolymerization
KW - Lignin
KW - Liquefied products
KW - Solid residue
UR - http://www.scopus.com/inward/record.url?scp=85042511793&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85042511793&partnerID=8YFLogxK
U2 - 10.1016/j.cep.2017.10.023
DO - 10.1016/j.cep.2017.10.023
M3 - Article
AN - SCOPUS:85042511793
VL - 126
SP - 38
EP - 44
JO - Chemical Engineering and Processing - Process Intensification
JF - Chemical Engineering and Processing - Process Intensification
SN - 0255-2701
ER -