Upgrading pyrolysis bio-oil through hydrodeoxygenation (HDO) using non-sulfided Fe-Co/SiO2 catalyst

Cheng, Shouyun; Wei, Lin; Julson, James; Rabnawaz, Muhammad

doi:10.1016/j.enconman.2017.08.024

Cited by 138 publications

(73 citation statements)

References 93 publications

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“…The highest crude-biofuel yield of 94% was achieved in the presence of PF3 catalyst. It was due to loading Fe, which could increase the acidity and active site of catalyst, resulting in the high catalytic efficiency of catalyst [25]. It was in agreement with previous work [26] which reported that the loading of Fe-doped γ-Al 2 O 3 catalyst exhibit enhanced catalytic activity due to higher Lewis acid sites.…”

Section: Catalytic Hydrocracking Reaction Testsupporting

confidence: 89%

Biofuels of Green Diesel–Kerosene–Gasoline Production from Palm Oil: Effect of Palladium Cooperated with Second Metal on Hydrocracking Reaction

et al. 2020

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In this work, two kinds of catalyst called monometallic Palladium (Pd) and a bimetallic of Pd-Iron (Fe) were synthesised using aluminum oxide (Al 2 O 3 ) as the supported material via the wet impregnate method. A monometallic catalyst (0.5% Pd/Al 2 O 3 ) named Pd cat was used as control. For the bimetallic catalyst, ratios of Pd to Fe were varied, and included 0.38% Pd-0.12% Fe (PF1), 0.25% Pd-0.25% Fe (PF2), and 0.12% Pd-0.38% Fe (PF3). The catalysts were characterised to investigate physical properties such as the surface area, pore size, porosity, and pore size distribution including their composition by Brunauer-Emmett-Teller (BET) surface area, Scanning Electron Microscopy (SEM), and X-Ray Diffraction (XRD). Subsequently, all catalysts were applied for biofuels production in terms of green diesel/kerosene/gasoline from palm oil via a hydrocracking reaction. The results showed that the loading of Fe to Pd/Al 2 O 3 could improve the active surface area, porosity, and pore diameter. Considering the catalytic efficiency for the hydrocracking reaction, the highest crude biofuel yield (94.00%) was obtained in the presence of PF3 catalyst, while Pd cat provided the highest refined biofuel yield (86.00%). The largest proportion of biofuel production was green diesel (50.00-62.02%) followed by green kerosene (31.71-43.02%) and green gasoline (6.10-8.11%), respectively. It was clearly shown that the Pd-Fe bimetallic and Pd monometallic catalysts showed potential for use as chemical catalysts in hydrocracking reactions for biofuel production.

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Section: Catalytic Hydrocracking Reaction Testsupporting

confidence: 89%

Biofuels of Green Diesel–Kerosene–Gasoline Production from Palm Oil: Effect of Palladium Cooperated with Second Metal on Hydrocracking Reaction

et al. 2020

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“…On the other hand, lower gas yield (compared to methanol) after the bio-oil-isopropanol reactions indicates isopropanol did not decompose to gas and the water content does not significantly increase. Reducing the moisture in the bio-oil is crucial as it can lead to increased ignition delay and decreased combustion rate in an engine [32]. On the other hand, water in bio-oil is beneficial as it reduces the viscosity [22].…”

Section: Physicochemical Properties Of Bio-oil and Treated Biooilsmentioning

confidence: 99%

“…The heating value of the crude bio-oil was 17.51 MJ$kg -1 . Increasing the heating value of the crude bio-oil is essential for improving its combustion efficiency in engines [32]. Table 2 shows minimal changes in the heating value after the reactions compared to the respective blends.…”

Section: Physicochemical Properties Of Bio-oil and Treated Biooilsmentioning

confidence: 99%

Production of renewable fuels by blending bio-oil with alcohols and upgrading under supercritical conditions

Omar

Alsamaq

Yang

et al. 2019

Front. Chem. Sci. Eng.

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The work studied a non-catalytic upgrading of fast pyrolysis bio-oil by blending under supercritical conditions using methanol, ethanol and isopropanol as solvent and hydrogen donor. Characterisation of the bio-oil and the upgraded bio-oils was carried out including moisture content, elemental content, pH, heating value, gas chromatography-mass spectrometry (GCMS), Fourier transform infrared radiation, 13 C nuclear magnetic resonance spectroscopy, and thermogravimetric analysis to evaluate the effects of blending and supercritical reactions. The GCMS analysis indicated that the supercritical methanol reaction removed the acids in the bio-oil consequently the pH increased from 2.39 in the crude bio-oil to 4.04 after the supercritical methanol reaction. The ester contents increased by 87.49% after the supercritical methanol reaction indicating ester formation could be the major deacidification mechanism for reducing the acidity of the bio-oil and improving its pH value. Simply blending crude bio-oil with isopropanol was effective in increasing the C and H content, reducing the O content and increasing the heating value to 27.55 from 17.51 MJ$kg-1 in the crude bio-oil. After the supercritical isopropanol reaction, the heating value of the liquid product slightly further increased to 28.85 MJ$kg-1 .

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“…In particular, transition metal phosphide catalysts have been reported to show excellent activities on HDO [14][15][16]. The HDO processes with supported-metallic catalysts were investigated to upgrade pyrolytic bio-oils [17,18]. Cheng et al [18] studied the HDO of bio-oil from pine sawdust with Fe-Co/SiO 2 catalysts and found that the bimetallic Fe-Co/SiO 2 catalysts (Fe/Co ratio of 1:1) showed better performance, as compared to monometallic catalysts (e.g., Fe/SiO 2 and Co/SiO 2 ).…”

Section: Introductionmentioning

confidence: 99%

Catalytic Hydrodeoxygenation of Fast Pyrolysis Bio-Oil from Saccharina japonica Alga for Bio-Oil Upgrading

Hwang

Choi

et al. 2019

Catalysts

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Biomass conversion via pyrolysis has been regarded as a promising solution for bio-oil production. Compared to fossil fuels, however, the pyrolysis bio-oils from biomass are corrosive and unstable due to relatively high oxygen content. Thus, an upgrading of bio-oil is required to reduce O component while improving stability in order to use it directly as fuel sources or in industrial processes for synthesizing chemicals. The catalytic hydrodeoxygenation (HDO) is considered as one of the promising methods for upgrading pyrolysis bio-oil. In this research, the HDO was studied for various catalysts (HZSM-5, metal, and metal-phosphide catalysts) to improve the quality of bio-oil produced by fast pyrolysis of Saccharina japonica (SJ) in a fluidized-bed reactor. The HDO processing was carried out in an autoclave at 350 °C and different initial pressures (3, 6, and 15 bar). During HDO, the oxygen species in the bio-oil was removed primarily via formation of CO2 and H2O. Among the gases produced through HDO, CO2 was observed to be most abundant. The C/O ratio of produced bio-oil increased when CoMoP/γ-Al2O3, Co/γ-Al2O3, Fe/γ-Al2O3, or HZSM-5 was used. The Co/γ-Al2O3 resulted in higher HDO performance than other catalysts. The bio-oil upgraded with Co/γ-Al2O3 showed high HHV (34.41 MJ/kg). With the use of catalysts, the kerosene-diesel fraction (carbon number C12–C14) was increased from 36.17 to 38.62–48.92 wt.%.

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Upgrading pyrolysis bio-oil through hydrodeoxygenation (HDO) using non-sulfided Fe-Co/SiO2 catalyst

Cited by 138 publications

References 93 publications

Biofuels of Green Diesel–Kerosene–Gasoline Production from Palm Oil: Effect of Palladium Cooperated with Second Metal on Hydrocracking Reaction

Biofuels of Green Diesel–Kerosene–Gasoline Production from Palm Oil: Effect of Palladium Cooperated with Second Metal on Hydrocracking Reaction

Production of renewable fuels by blending bio-oil with alcohols and upgrading under supercritical conditions

Catalytic Hydrodeoxygenation of Fast Pyrolysis Bio-Oil from Saccharina japonica Alga for Bio-Oil Upgrading

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