TY - JOUR
T1 - Catalytic conversion of cellulosic biomass to ethylene glycol
T2 - Effects of inorganic impurities in biomass
AU - Pang, Jifeng
AU - Zheng, Mingyuan
AU - Sun, Ruiyan
AU - Song, Lei
AU - Wang, Aiqin
AU - Wang, Xiaodong
AU - Zhang, Tao
N1 - Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - The effects of typical inorganic impurities on the catalytic conversion of cellulose to ethylene glycol (EG) were investigated, and the mechanism of catalyst deactivation by certain impurities were clarified. It was found that most impurities did not affect the EG yield, but some non-neutral impurities or Ca and Fe ions greatly decreased the EG yield. Conditional experiments and catalyst characterization showed that some impurities changed the pH of the reaction solution and affected the cellulose hydrolysis rate; Ca and Fe cations reacted with tungstate ions and suppressed the retro-aldol condensation. To obtain a high EG yield, the pH of the reaction solution and the concentration of tungstate ions should be respectively adjusted to 5.0-6.0 and higher than 187. ppm. For raw biomass conversion, negative effects were eliminated by suitable pretreatments, and high EG yields comparable to those from pure cellulose were obtained.
AB - The effects of typical inorganic impurities on the catalytic conversion of cellulose to ethylene glycol (EG) were investigated, and the mechanism of catalyst deactivation by certain impurities were clarified. It was found that most impurities did not affect the EG yield, but some non-neutral impurities or Ca and Fe ions greatly decreased the EG yield. Conditional experiments and catalyst characterization showed that some impurities changed the pH of the reaction solution and affected the cellulose hydrolysis rate; Ca and Fe cations reacted with tungstate ions and suppressed the retro-aldol condensation. To obtain a high EG yield, the pH of the reaction solution and the concentration of tungstate ions should be respectively adjusted to 5.0-6.0 and higher than 187. ppm. For raw biomass conversion, negative effects were eliminated by suitable pretreatments, and high EG yields comparable to those from pure cellulose were obtained.
KW - Deactivation mechanism
KW - Ethylene glycol
KW - Inorganic impurities
KW - Lignocellulosic biomass
KW - Tungstenic catalyst
UR - http://www.scopus.com/inward/record.url?scp=84910010973&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2014.10.076
DO - 10.1016/j.biortech.2014.10.076
M3 - 文章
C2 - 25459851
AN - SCOPUS:84910010973
SN - 0960-8524
VL - 175
SP - 424
EP - 429
JO - Bioresource Technology
JF - Bioresource Technology
ER -
