TY - JOUR
T1 - Catalytic upgrading of pretreated algal bio-oil over zeolite catalysts in supercritical water
AU - Duan, Peigao
AU - Xu, Yuping
AU - Wang, Feng
AU - Wang, Bing
AU - Yan, Weihong
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2016/12/15
Y1 - 2016/12/15
N2 - We report the catalytic hydrothermal upgrading of pretreated algal bio-oil. The reaction was performed at 400 °C for 240 min with the addition of 6 MPa H2 and 10 wt.% zeolite catalyst in supercritical water (ρH2O = 0.025 g/cm3). Nine zeolites (Hβ, HZSM-5 (SiO2/Al2O3 = 25:1), HZSM-5 (SiO2/Al2O3 = 50:1), HZSM-5 (SiO2/Al2O3 = 170:1), HY (5% Na2O), HY (0.8% Na2O), SAPO-11, MCM-41 (50% Si), and MCM-41 (100% Si) were screened to investigate their effects on the yields of the product fraction and the properties (e.g., elemental composition and heating value) of the upgraded bio-oil. The catalyst type affected the yields of the product fractions: SAPO-11 produced the lowest upgraded bio-oil yield of 42.4 wt.%, and MCM-41 provided the highest yield of 54.5 wt.%. Compared with non-catalytic upgrading reactions, all of the zeolites promoted the denitrogenation, deoxygenation, and desulfurization of the pretreated bio-oil due to the presence of acid sites. HY (5% Na2O), HY (0.8% Na2O), and HZSM-5 (SiO2/Al2O3 = 25:1) showed the highest activity toward denitrogenation, deoxygenation, and desulfurization, respectively. The upgraded bio-oil mainly consisted of hydrocarbons, accounting for 80% in total and as high as 95.6% of the fraction below 400 °C.
AB - We report the catalytic hydrothermal upgrading of pretreated algal bio-oil. The reaction was performed at 400 °C for 240 min with the addition of 6 MPa H2 and 10 wt.% zeolite catalyst in supercritical water (ρH2O = 0.025 g/cm3). Nine zeolites (Hβ, HZSM-5 (SiO2/Al2O3 = 25:1), HZSM-5 (SiO2/Al2O3 = 50:1), HZSM-5 (SiO2/Al2O3 = 170:1), HY (5% Na2O), HY (0.8% Na2O), SAPO-11, MCM-41 (50% Si), and MCM-41 (100% Si) were screened to investigate their effects on the yields of the product fraction and the properties (e.g., elemental composition and heating value) of the upgraded bio-oil. The catalyst type affected the yields of the product fractions: SAPO-11 produced the lowest upgraded bio-oil yield of 42.4 wt.%, and MCM-41 provided the highest yield of 54.5 wt.%. Compared with non-catalytic upgrading reactions, all of the zeolites promoted the denitrogenation, deoxygenation, and desulfurization of the pretreated bio-oil due to the presence of acid sites. HY (5% Na2O), HY (0.8% Na2O), and HZSM-5 (SiO2/Al2O3 = 25:1) showed the highest activity toward denitrogenation, deoxygenation, and desulfurization, respectively. The upgraded bio-oil mainly consisted of hydrocarbons, accounting for 80% in total and as high as 95.6% of the fraction below 400 °C.
KW - Hydrothermal liquefaction
KW - Microalgae
KW - Pretreatment
KW - Upgraded
KW - Upgraded bio-oil
KW - Zeolites
UR - https://www.scopus.com/pages/publications/84949637634
U2 - 10.1016/j.bej.2015.12.006
DO - 10.1016/j.bej.2015.12.006
M3 - 文章
AN - SCOPUS:84949637634
SN - 1369-703X
VL - 116
SP - 105
EP - 112
JO - Biochemical Engineering Journal
JF - Biochemical Engineering Journal
ER -