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Bio-oil production from fast pyrolysis of furniture processing residue
Hoang Vu Ly,Quoc Khanh Tran,천병희,오창호,김진수,김승수 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.2
The pyrolysis characteristic of furniture processing residue (FPR), which was analyzed by thermogravimetric analysis (TGA) under nitrogen atmosphere, mainly decomposed between 230 oC and 500 oC. The FPR was submitted to fast pyrolysis in a bubbling fluidized-bed reactor (BFR) for converting into bio-oil, bio-char. The product distribution and characteristics of bio-oil depend on the operating conditions (temperature, fluidizing flow rate, particle size of sample). The bio-oil yield showed the highest value (50.68 wt%) at the pyrolysis temperature of 450 oC with a biomass particle size of 1.0mm and a fluidization velocity of 2.0×Umf. The bio-oil had high selectivity for dioctyl phthalate, levoglucosan, and phenolic derivatives. The carbon number proportions in bio-oils of FPR were 32.74wt% for C5- C11 fraction, 47.60 wt% for C12-C18 fraction and 19.38 wt% of C25-C38 fraction, respectively. The gas product included CO, CO2, H2, and hydrocarbons (C1-C4), and the selectivity of CO2 was the highest. The high heating value (HHV) of gas products was between 4.60 and 12.90 MJ/m3. The bio-char shows high HHV (23.87 MJ/kg) and high C content (62.47wt%) that can be applied as a solid fuel.
1P-291 Fractional catalytic pyrolysis of tulip tree (Liriodendron) for upgrading bio-oil
( Ly Hoang Vu ),김승수,김진수 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
In this study, the fast pyrolysis of tulip tree was performed in a bubbling fluidized-bed reactor under different reaction conditions (pyrolysis temperature, with and without catalyst) to investigate the effects of these parameters on product yield and bio-oil quality. The quality of pyrolysis bio-oil can be improved by upgrading the pyrolysis vapor before its condensation using catalyst. Catalytic fast pyrolysis has attracted a lot of attention as a promising method for producing high quality bio-oil from biomass feedstock. The system used silica sand, ferric oxides (Fe<sub>2</sub>O<sub>3</sub> and Fe<sub>3</sub>O<sub>4</sub>) and HZSM-5 as the fluidized-bed material and nitrogen as the fluidizing medium. The liquid yield reach highest value of was 54.96 wt% at the pyrolysis temperature of 450°C, using Fe<sub>2</sub>O<sub>3</sub> catalyst compare to this of 48.45 wt.% for HZSM-5, 47.57 wt.% for Fe<sub>3</sub>O<sub>4</sub> and 49.03 wt.% with sand. Catalysts rejected oxygen mostly as water and produced lower amount of CO, CO<sub>2</sub> but higher amount of hydrocarbons gas.
Ly, Hoang Vu,Lim, Dong-Hyeon,Sim, Jae Wook,Kim, Seung-Soo,Kim, Jinsoo Elsevier 2018 ENERGY Vol.162 No.-
<P><B>Abstract</B></P> <P>Fractional catalytic pyrolysis is an updated pyrolysis method, in which the biomass can be converted into higher quality bio-oil by upgrading the pyrolysis vapor in fluidized bed. In this study, the fast pyrolysis of tulip tree (<I>Liriodendron</I>) was performed in a bubbling fluidized-bed reactor under various reaction conditions (pyrolysis temperature, flow rate of fluidizing medium, and biomass particle size) to investigate the effects of these parameters on product yield and bio-oil quality. The system used silica sand and dolomite as the fluidizing bed material, and nitrogen as the fluidizing medium. When the pyrolysis temperature increased from 400 °C to 550 °C, the bio-oil yield was between 40.07 wt% and 49.03 wt% compared to those of 28.38 and 44.83 wt% using dolomite catalyst. Deoxygenation of bio-oil mostly produced water, and produced lower amounts of CO and CO<SUB>2</SUB>, but higher amounts of H<SUB>2</SUB> and hydrocarbons gas. The catalytic process obtaineda high ratio of H<SUB>2</SUB>/CO in the gas product.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Pyrolysis of tulip tree in fluidized bed reactor under different conditions. </LI> <LI> Catalytic pyrolysis using dolomite catalyst for upgrading bio-oil's quality. </LI> <LI> Dolomite rejected oxygen from pyrolysis vapor, mostly through dehydration. </LI> <LI> The catalytic process produced high H<SUB>2</SUB>/CO ratio in the gas product. </LI> </UL> </P>
Ly, Hoang Vu,Galiwango, Emmanuel,Kim, Seung-Soo,Kim, Jinsoo,Choi, Jae Hyung,Woo, Hee Chul,Othman, Mohd Roslee Elsevier 2017 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.317 No.-
<P><B>Abstract</B></P> <P>We report the hydrodeoxygenation of 2-furyl methyl ketone over iron phosphide catalyst to reform the C<SUB>6</SUB> structure into C<SUB>7</SUB> compounds with higher octane ratings. High conversion and yield were achievable from the reaction at 400°C when 5wt% Fe<SUB>2</SUB>P/γ-Al<SUB>2</SUB>O<SUB>3</SUB> catalyst calcined at 600°C was used. High calcination temperature and reaction temperature are the favorable conditions to achieve high conversion in the reaction. The highest conversion of 92.60% was achieved with 2-allyl furan yield of 79.34% and methyl cylcohexane yield of 13.26% in the liquid phase and 100% carbon dioxide in the gas phase.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Fe<SUB>2</SUB>P/γ-Al<SUB>2</SUB>O<SUB>3</SUB> and Ni<SUB>2</SUB>P/γ-Al<SUB>2</SUB>O<SUB>3</SUB> catalyzed the hydrodeoxygenation of 2-furyl methyl ketone (FMK). </LI> <LI> Effects of reaction temperature, phosphorous, and metal loading were investigated. </LI> <LI> Phosphide catalyst with iron content produced the predominant selectivity of 2-allyl furan and the least methyl cyclohexane. </LI> <LI> 5wt% Fe<SUB>2</SUB>P/γ-Al<SUB>2</SUB>O<SUB>3</SUB> calcined at 600°C had the highest FMK conversion and yield to 2-allyl furan. </LI> </UL> </P>
Effect of treatment method on pyrolysis of saccharina japonica alga in fluidized-bed reactor
( Ly Hoang Vu ),김승수,김진수,우희철 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
In this research, the Saccharina japonica macroalgae was pre-treated by diluted acid solution at different concentration to remove inorganic species. The pyrolysis behavior of pre-treated material was performed in a bubbling fluidized-bed reactor. The effects of pyrolysis conditions on product yield and the quality of bio-oil were systematically investigated. When the pyrolysis temperature increased from 450°C to 500°C, the bio-oil yield was between 39.70 wt% and 45.87 wt%. %. The major compounds in the bio-oil were levoglucosan and di-anhydromannitol, showing the highest selectivities of 35.41% and 14.52%, respectively. The selectivity of gas composition (CO, CO2, (C1~C4) hydrocarbon) varied with conditions. The compositions of bio-char were determined by elemental analysis and inductively couple plasma. These results were compared to those obtained from the pyrolysis of raw S. japonica and S. japonica residue after ethanol-extraction.
Catalytic hydrodeoxygenation of a model compound in pyrolysis bio-oil of saccharina japonica
( Ly Hoang Vu ),( Emmanuel Galiwango ),고영채,김승수,김진수,우희철 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
The model compound of 2-furyl methyl ketone (2-FMK) a product of pyrolysis oil from Saccharina japonnica was used for hydrodeoxygenation (HDO) using spray-pyrolysis (S.P) prepared catalysts (Ni, Co and CoP) and incipient-wetness impregnation (I.W) prepared catalysts (Ni), supported on γ-Al2O3. The effect of catalyst activity and stability on 2-FMK at different reaction temperatures and calcination temperatures were investigated. Catalyst activity increased with increase in calcination temperature, but decreased with increase in reaction time, for all catalysts. The spray-pyrolysis prepared catalyst Ni/γ-Al2O3-S.P (Ni-loading of 10 wt%, calcinated at 800°C) showed the best activity with 83.02% in 2-FMK conversion at 400°C. The produced gas and liquid was analyzed by gas chromatography (GC) with TCD/FID detector and GC-MS, respectively, to determine the product compositions.