TY - JOUR
T1 - Acid-catalysed treatment of the mallee leaf bio-oil with methanol
T2 - Effects of molecular structure of carboxylic acids and esters on their conversion
AU - Hu, Xun
AU - Mourant, Daniel
AU - Wang, Yi
AU - Wu, Liping
AU - Chaiwat, Weerawut
AU - Gunawan, Richard
AU - Gholizadeh, Mortaza
AU - Lievens, Caroline
AU - Garcia-Perez, Manuel
AU - Li, Chun Zhu
PY - 2013/2/1
Y1 - 2013/2/1
N2 - Acid-treatment of the bio-oil from the pyrolysis of mallee leaves in methanol over a solid acid catalyst Amberlyst 70 has been investigated in this study. The reactivities of the carboxylic acids with methanol were quite different over the solid acid catalyst, which was closely related to their distinct molecular structures. The linear alkyl substituted groups, the branched alkyl substituted groups, and the aromatic carbon chain of the acids created the different steric hindrances, which negatively affected their accessibility to the catalytic sites on/in the solid acid catalyst. Similar steric effects were found in the conversion of the heavy esters into small esters via transesterification. In addition to the esterification/transesterification, the methanolysis of the olefin and decomposition of the oligomers in bio-oil occurred simultaneously during the acid treatment, which converted the reactive components into the relatively volatile and stable ones and improved the quality of the bio-oil.
AB - Acid-treatment of the bio-oil from the pyrolysis of mallee leaves in methanol over a solid acid catalyst Amberlyst 70 has been investigated in this study. The reactivities of the carboxylic acids with methanol were quite different over the solid acid catalyst, which was closely related to their distinct molecular structures. The linear alkyl substituted groups, the branched alkyl substituted groups, and the aromatic carbon chain of the acids created the different steric hindrances, which negatively affected their accessibility to the catalytic sites on/in the solid acid catalyst. Similar steric effects were found in the conversion of the heavy esters into small esters via transesterification. In addition to the esterification/transesterification, the methanolysis of the olefin and decomposition of the oligomers in bio-oil occurred simultaneously during the acid treatment, which converted the reactive components into the relatively volatile and stable ones and improved the quality of the bio-oil.
KW - Bio-oil
KW - Carboxylic acids
KW - Esterification
KW - Mallee leaves
KW - Solid acid catalyst
KW - ITC-ISI-JOURNAL-ARTICLE
UR - https://ezproxy2.utwente.nl/login?url=https://doi.org/10.1016/j.fuproc.2012.09.028
UR - https://ezproxy2.utwente.nl/login?url=https://library.itc.utwente.nl/login/2013/isi/lievens_aci.pdf
U2 - 10.1016/j.fuproc.2012.09.028
DO - 10.1016/j.fuproc.2012.09.028
M3 - Article
AN - SCOPUS:84870557458
SN - 0378-3820
VL - 106
SP - 569
EP - 576
JO - Fuel processing technology
JF - Fuel processing technology
ER -