Microwave-assisted catalytic fast pyrolysis coupled with microwave-absorbent of soapstock for bio-oil in a downdraft reactor

Wang, Yunpu; Wu, Qiuhao; Yang, Sha; Yang, Qi; Wu, Junlin; Ma, Zhiyun; Jiang, Lin; Yu, Zhenting; Dai, Leilei; Liu, Yuhuan; Ruan, Roger; Fu, Guiming; Zhang, Bo; Zhu, Hai‐Bin

doi:10.1016/j.enconman.2019.01.101

Cited by 65 publications

(41 citation statements)

References 45 publications

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“…In recent years, catalytic upgrading of lipid-base pyrolysis vapors over a catalyst fixed bed has been applied as an alternative process to deoxygenate bio-oils volatiles and produce liquid mixtures rich in hydrocarbons with superior transport and physicochemical properties, and the literature reports several studies on the subject [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Most studies on catalytic upgrade focused on the pyrolysis vapors of lipid-base materials including microalgae such as Chlorella vulgaris [1], Chromolaena odorata [2], Jatropha waste [3][4][5][6], soap stock [2,7,8], waste cooking oil [9,10], cottonseed oil dregs [11], tallow kernel oil [12], and castor seed oil [13].…”

Section: Introductionmentioning

confidence: 99%

“…The pyrolysis vapors of lipid-base materials chemically upgraded over catalyst supports including Ni/Y-zeolite [1], HZSM-5 [2,[6][7][8]10], metal oxide (Ce, Pd, Ru, Ni) impregnated activated carbon [3], oxide-base catalysts [4,5,13] [4], CaO [5,13], ZnO [13], and kaolin [13], MCM-41 [8,12], HZSM-5/MCM-41 [8], metal oxide (Ca, Ce, Zr, Ni, Co) impregnated HZSM-5 (CaO/HZSM-5, CeO 2 /HZSM-5, ZrO 2 /HZSM-5, NiO/HZSM-5, CoO/HZSM-5) [9], metal impregnated (Co, Ni All the studies on catalytic upgrade of pyrolysis vapors from lipid-base materials focused on deoxygenation of bio-oil [1][2][3][4][5][6][7][8][9][10][11][12][13], but emphasis has also been given on the conversion of BTEXN (Benzene, Toluene, Ethyl-benzene, Xylene, Naphthalene) [3,6,9], as well as reaction mechanism/pathway [3,[10][11][12]. The catalytic upgrade of pyrolysis volatiles has been carried out by flash pyrolysis/analytical pyrolysis (Py-GC/MS) [3,4,6], as well as by vacuum pyrolysis [7,9,…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Upgrading of Residual Fat Pyrolysis Vapors over Activated Carbon Pellets into Hydrocarbons-like Fuels in a Two-Stage Reactor: Analysis of Hydrocarbons Composition and Physical-Chemistry Properties

et al. 2022

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This work investigated the influence of the reaction time and catalyst-to-residual fat ratio by catalytic upgrading from pyrolysis vapors of residual fat at 400 °C and 1.0 atmosphere, on the yields of reaction products, physicochemical properties (density, kinematic viscosity, and acid value) and chemical composition of bio-oils, over a catalyst fixed-bed reactor of activated carbon pellets impregnated with 10.0 M NaOH, in semi-pilot scale. The experiments were carried out at 400 °C and 1.0 atmosphere, using a process schema consisting of a thermal cracking reactor of 2.0 L coupled to a catalyst fixed-bed reactor of 53 mL, without catalyst and using 5.0%, 7.5%, and 10.0% (wt.) activated carbon pellets impregnated with 10.0 M NaOH, in batch mode. Results show yields of bio-oil decreasing with increasing catalyst-to-tallow ratio. The GC-MS of liquid reaction products identified the presence of hydrocarbons (alkanes, alkenes, ring-containing alkanes, ring-containing alkenes, and aromatics) and oxygenates (carboxylic acids, ketones, esters, alcohols, and aldehydes). For all the pyrolysis and catalytic cracking experiments, the hydrocarbon selectivity in bio-oil increases with increasing reaction time, while those of oxygenates decrease, reaching concentrations of hydrocarbons up to 95.35% (area).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Catalytic Upgrading of Residual Fat Pyrolysis Vapors over Activated Carbon Pellets into Hydrocarbons-like Fuels in a Two-Stage Reactor: Analysis of Hydrocarbons Composition and Physical-Chemistry Properties

et al. 2022

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“…Besides, the coke yield in upgrading process increased from 16 wt.% to 40 wt.% as the biooil/catalyst ratio decreased from 1:1 to 1:4. Wang et al also found that the coke yield of their upgrading bio-oil process increased from 0.19 wt.% to 2.70 wt.% when applying the catalytic method to upgrade bio-oil [17]. The addition of catalyst promoted catalyst thermal cracking, which decreased the bio-oil yield.…”

Section: Effect Of Bio-oil/catalyst Ratiomentioning

confidence: 99%

Bio-Oil From Rubber Wood: Effects of Upgrading Conditions

Nguyen¹,

Duc²,

Vu³

et al. 2020

JST

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Despite its prominent potential, the use of rubber wood (Hevea brasiliensis) for bio-oil production has not been fully investigated. This study reported experimental results of the bio-oil production and upgrading from rubber wood using fast pyrolysis technology. The effects of catalyst nature (vermiculite and dolomite), upgrading temperature and bio-oil/catalyst ratio on the product quality were deeply investigated. The results showed that dolomite was suitable to be used as a catalyst for bio-oil upgrading. At 600 °C and a bio-oil/catalyst ratio of 1:1, the bio-oil yield was maximized, while at 400 °C and a ratio of 1:3, the bio-oil heating value was maximized. Depending on usage purposes, a yield-oriented, heating value-oriented or in-between bio-oil upgrading solution could be considered.

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“…Although most of the catalysts were still conventional molecular sieves, these technological innovations were of great significance to guide the research of hierarchical molecular sieves catalytic pyrolysis of biomass. At present, many scholars had done Emany researches from the following aspects: the raw material pretreatment process (drying pretreatment, acid treatment, alkali treatment, torrefaction pretreatment, and nitrogen‐rich pretreatment), microwave‐assisted pyrolysis process, and hydrogen reagents (hydrogen methanol, waste plastic, methane, lignite, waste types, waste oil, etc. ) synergetic catalytic copyrolysis process and pyrolysis process parameters (reaction temperature, weight hourly space velocity, retention time, feed rate, silicon to aluminum ratio of catalyst, ratio of catalyst to biomass, gas flow rate, types of pyrolyzer, and fixed bed height) and achieved great results.…”

Section: Introductionmentioning

confidence: 99%

Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

et al. 2020

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The present work aims to investigate the thermal behavior, kinetics, thermodynamics, and product distribution during copyrolysis of transition metal salt (Ni, Co, Zn, Cu, and Fe)-added biomass and model compounds with low density polyethylene(LDPE) over a Ni-based HZSM-5 catalyst by TGA and fixed bed reactor. The interactions and reaction mechanisms during copyrolysis were evaluated. The influence of Ni-impregnated biomass (C-M) and Nimodified HZSM-5 (Ni/HZ) on the formation of pyrolysis bio-oil from biomass and model compounds and its subsequent effect on catalytic pyrolysis vapor upgrading was discussed. The results indicated that the presence of transition metal decreased the thermal degradation temperature and thermodynamics parameters; maximum decomposition rate, and reaction complexity. Ni/HZ catalyst could further decrease the activation energy, accelerate the reaction rate and change reaction process, and the modified samples/LDPE under copyrolysis with HZSM-5 catalyst presented a more significant effect than Ni/HZ catalyst. Subsequently, the Ea of pine, cellulose and lignin changed from 24.11, 18.29, and 28.68 kJ/mol (CP@Ni/HZ) to 56.04, 69.84, and 16.21 kJ/mol (CP-Ni@HZSM-5), respectively. In addition, Ni could inhibit the depolymerization of cellulose and promoted the formation of char, coke, and lignin derived phenolics. And Ni-impregnated biomass reduced the formation of desired aromatic hydrocarbons, but result in increasing of the char and non-condensable gases. But Ni/HZ catalysts promote the conversion of biomass to target products.

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Microwave-assisted catalytic fast pyrolysis coupled with microwave-absorbent of soapstock for bio-oil in a downdraft reactor

Cited by 65 publications

References 45 publications

Catalytic Upgrading of Residual Fat Pyrolysis Vapors over Activated Carbon Pellets into Hydrocarbons-like Fuels in a Two-Stage Reactor: Analysis of Hydrocarbons Composition and Physical-Chemistry Properties

Catalytic Upgrading of Residual Fat Pyrolysis Vapors over Activated Carbon Pellets into Hydrocarbons-like Fuels in a Two-Stage Reactor: Analysis of Hydrocarbons Composition and Physical-Chemistry Properties

Bio-Oil From Rubber Wood: Effects of Upgrading Conditions

Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

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