Hydrogen production by biomass gasification in supercritical water with a fluidized bed reactor

Lu, Youjun; Jin, Hui; Guo, Liejin; ZHANG, X; Chen, Cao; Guo, Xing‐Min

doi:10.1016/j.ijhydene.2008.07.082

Cited by 232 publications

(104 citation statements)

References 35 publications

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“…Hydrogen, methane and syngas have been produced by hydrothermal gasification of biomass substrates and model compounds such as glucose, cellulose and lignin in supercritical water [13][14][15][16][17][18], and glycerol gasification has been investigated as well [10,19]. Supercritical water has particular properties that provide a highly reactive and homogeneous medium for the conversion of organic molecules.…”

Section: Introductionmentioning

confidence: 99%

Catalytic gasification of glycerol in supercritical water

May

Salvadó

Torras

et al. 2010

Chemical Engineering Journal

100

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The conversion of glycerol in supercritical water (SCW) was studied at 510 -550°C and a pressure of 350 bars using both a bed of inert and non-porous ZrO 2 particles (hydrothermal experiments), and a bed of 1 % Ru/ZrO 2 catalyst particles. Experiments were conducted with a glycerol concentration of 5 wt% in a continuous isothermal fixed-bed reactor at a residence time between 2 and 10 s. Hydrothermolysis of glycerol formed water-soluble products such as acetaldehyde, acetic acid, hydroxyacetone and acrolein, and also gases like H 2 , CO and CO 2 .The catalyst enhanced the formation of acetic acid, inhibited the formation of acrolein, and promoted the gasification of the glycerol decomposition products. Hydrogen and carbon oxides were the main gases produced in the catalytic experiments, with only minor amounts of methane and ethylene. Complete glycerol conversion was achieved at a residence time of 8.5 s at 510 °C, and at around 5 s at 550 °C with a 1 wt% Ru/ZrO 2 catalyst. The catalyst was not active enough to achieve complete gasification, since high yields of primary products like acetic acid and acetaldehyde were still present. Carbon balances were between 80 and 60 % in the catalytic experiments, decreasing continuously as the residence time was increased. This was attributed partially to the formation of methanol and acetaldehyde, which were not recovered and analyzed efficiently in our set-up, but also to the formation of carbon deposits. Carbon deposition was not observed on the catalyst particles but on the surface of the inert zirconia particles, especially at high residence time. This was related to the higher concentration of acetic acid and other acidic species in the catalytic experiments, which may polymerize to form tar-like carbon precursors. Because of carbon deposition, hydrogen yields were significantly lower than expected; for instance at 550 ºC the hydrogen yield potential was only 50 % of the stoichiometric value.

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Section: Introductionmentioning

confidence: 99%

Catalytic gasification of glycerol in supercritical water

May

Salvadó

Torras

et al. 2010

Chemical Engineering Journal

100

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“…The concept of SCWFB reactor was proposed first by Matsumura and Minowa [4]. In 2008, State Key Laboratory of Multiphase Flow in Power Engineering (SKLMF) of Xi'an Jiaotong University developed a SCWFB reactor for hydrogen production by gasifying wet biomass [5]. The reactor could avoid plugging, increase the hydrogen yield and improve gasification efficiency.…”

Section: Applications Of Supercritical Fluidized Bedmentioning

confidence: 99%

A Review on Supercritical Fluidization

Lu¹,

Wei²,

Huang³

2018

Thermal Power Plants - New Trends and Recent Developments

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“…ZIEGLO have studied the heat transfer performance of liquid-solid two-phase flow and three-phase fluidized bed, assuming the liquid content is constant in the three-phase flow and two-phase flow systems by setting the example of glass particle and column Y-particle. Then the three-phase flow and two-phase flow heat transfer coefficient should be expressed by thermal resistance of fluidized bed [20][21][22][23][24]. The result is that the three-phase fluidized bed heat transfer coefficient and the corresponding liquid-solid two-phase fluidized bed heat transfer coefficient can be obtained by the following correlation formula: …”

Section: Three-phase Flow Heat Transfer Modelmentioning

confidence: 99%

Experimental Study on Hydrodynamic Performance and Heat Transfer Mechanism of Vapor-liquid-solid Three-Phase Fluidized Bed

Guo¹,

Qi²,

Zheng³

et al. 2016

IJHT

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In consideration of the characteristics of vapor-liquid-solid three-phase fluidized bed, this evaporator is applied in the liquid food-green tea extraction liquid concentration/evaporation process in this paper. The inert particles fluidized bed evaporation experiment device is designed and built combined with the characteristics of food material concentration. In this experiment, the heat transfer mechanism and hydrodynamic performance of inert particles fluidized bed evaporator during extraction of concentrated green tea are studied, and the impact of various experimental operation parameters on the evaporation and heat transfer performance as well as pressure dropping is analyzed. Moreover, the dimensionless analysis method is used to establish a correlation formula between the heat transfer coefficient and pressure drop dimensionless number of inert particle fluidized bed evaporator according to the characteristics of inert particles fluidized bed. In addition, the fouling prevention and descaling property and hydrodynamic performance of inert particle fluidized bed evaporator are studied, providing practical significance for industrial production.

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Hydrogen production by biomass gasification in supercritical water with a fluidized bed reactor

Cited by 232 publications

References 35 publications

Catalytic gasification of glycerol in supercritical water

Catalytic gasification of glycerol in supercritical water

A Review on Supercritical Fluidization

Experimental Study on Hydrodynamic Performance and Heat Transfer Mechanism of Vapor-liquid-solid Three-Phase Fluidized Bed

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