Influence of the pyrolysis and heterogeneous char reactions modeling in the simulation of sugarcane bagasse gasification in a bubbling fluidized bed reactor

Verissimo, Gabriel Lisbôa; Leiroz, Albino J. K.; Cruz, Manuel

doi:10.1016/j.fuel.2020.118750

Cited by 13 publications

(5 citation statements)

References 49 publications

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“…For example, Likun et al carried out the CFP conversion of bagasse on the HZSM-5 zeolite catalyst through a fluidized bed reactor and obtained the highest selectivity of benzene of 46.44% at 500 °C and a gas flow rate of 2.5 L min –1 . However, the large size of the reactor also makes the construction and operation cost high . The fluidized bed reactor is mainly divided into three basic types: (a) blistering, (b) entrainment, and (c) circulation.…”

Section: Reactorsmentioning

confidence: 99%

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State of the Art and Perspectives in Catalytic Conversion Mechanism of Biomass to Bio-aromatics

Yan

2020

Energy Fuels

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Research on biomass decomposition and transformation has attracted widespread attention from academia to industry worldwide, aiming to harvest bio-aromatics from the abundant renewable biomass resource. However, the complexity of the structure and composition of biomass makes its conversion into bio-aromatics a very challenging task. Hence, it is necessary to understand in depth the mechanism of biomass conversion to bio-aromatics with higher selectivity. Although considerable progress has been achieved on the development of bio-aromatics from biomass, the detailed process and reaction mechanism for the bioaromatics synthesis has lacked a complete summary. This work reviews the recent advances in the conversion of biomass to bioaromatics, including biomass gasification, pyrolysis, and hydrolytic fermentation, etc. Various biomass sources and biomass-derived model compounds as examples were used to illustrate the effect of different raw materials on the yield of bio-aromatics. Subsequently, this review summarizes the influence of different catalysts on the synthesis of bio-aromatics and the metal-modified HZSM-5 catalysts exhibited a higher bio-aromatics yield compared with those of other catalysts. Finally, the reaction mechanism of biomass to bio-aromatic hydrocarbons via different reaction routes was discussed in detail. The aim is for the conversion mechanism presented in this work to provide a reference for the efficient conversion of bio-aromatics from biomass in the future.

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Section: Reactorsmentioning

confidence: 99%

“…However, the large size of the reactor also makes the construction and operation cost high. 176 The fluidized bed reactor is mainly divided into three basic types: (a) blistering, (b) entrainment, and (c) circulation. In these reactors, the biomass suspension is used to accelerate the thermochemical conversion of biomass.…”

Section: Reactorsmentioning

confidence: 99%

State of the Art and Perspectives in Catalytic Conversion Mechanism of Biomass to Bio-aromatics

Yan

2020

Energy Fuels

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“…Besides catalyst improvement, different reactor configurations have also investigated to improve propylene yield. , The fluidized bed reactor has many advantages in comparison with the conventional fixed bed reactor, such as more efficient heat removal, facile temperature control, and less formation of hot spots, using small size of particles and therefore negligible mass transfer limitations. These attractive features have strongly nominated the fluidized bed as a reactor for ODHP. − …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, presentation of mechanistic modeling is essential in order to design, scale up, optimize, and control the process. Over the last decades, several mathematical models based on the fluidization modeling (FM) − have been developed for different catalytic reactions in the fluidized bed reactor including ODHP. For example, Torabi et al .…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Different Two-Phase Models for the Propane Oxidative Dehydrogenation in a Bubbling Fluidized Bed Containing the VO_x/γ-Al₂O₃ Catalyst

Khraibet

Mazloom

Banisharif

2021

Ind. Eng. Chem. Res.

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The modeling of oxidative dehydrogenation of propane over the VO x /γ-Al2O3 catalyst in a bubbling fluidized bed was studied. The performance of the fluidized bed reactor was studied by using three different fluidization models with different hydrodynamic assumptions: simple two-phase (STP) model, dynamic two-phase (DTP) model, and El-Halwagi and El-Rifai [simplified Halwagi (SH)] model. The models were validated using previously published experimental data. The effects of temperature, gas velocity, propane and oxygen concentration and bed height on propane conversion, product selectivity, and propylene yield were investigated and discussed. The obtained results indicated that the SH model under-predicted the propane conversion. The STP model with simplified hydrodynamic assumptions was only suitable when reaction temperature was low. The DTP model considering dynamically distribution of gas and solid could predict propane conversion and propylene selectivity with average relative errors of 16 and 2.5%, respectively, over a wide range of experimental data, which were more accurate than those of the STP and SH models.

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“…It is not clear whether the material balance at the pyrolysis step was closed. In [17] the authors did in depth analysis of different pyrolysis models which can be used in gasification modelling. It was concluded that the models of Ranzi [18] and Anca-Couce [19] are most appropriate for that purpose.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pyrolysis Reactions on Coal and Biomass Gasification Process

et al. 2021

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Thermodynamic analysis of a gasification process was conducted assuming that it is composed of two successive stages, namely: pyrolysis reaction followed by a stage of gasification reaction. This approach allows formulation the models of selected gasification processes dominating in industrial applications namely: Shell (coal), SES (coal), and DFB (dual fluid bed, biomass) gasification. It was shown that the enthalpy of fuel formation is essential for the correctness of computed results. The specific computational formula for a wide range of fuels enthalpy of formation was developed. The following categories were evaluated in terms of energy balance: total reaction enthalpy of gasification process, enthalpy of pyrolysis reaction, enthalpy of gasification reaction, heat demand for pyrolysis reaction, and heat demand for gasification reactions. The discussion of heat demand for particular stages of gasification related to the various processes was performed concluding the importance of the pyrolysis stage.

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Influence of the pyrolysis and heterogeneous char reactions modeling in the simulation of sugarcane bagasse gasification in a bubbling fluidized bed reactor

Cited by 13 publications

References 49 publications

State of the Art and Perspectives in Catalytic Conversion Mechanism of Biomass to Bio-aromatics

State of the Art and Perspectives in Catalytic Conversion Mechanism of Biomass to Bio-aromatics

Comparative Study of Different Two-Phase Models for the Propane Oxidative Dehydrogenation in a Bubbling Fluidized Bed Containing the VO_x/γ-Al₂O₃ Catalyst

Effect of Pyrolysis Reactions on Coal and Biomass Gasification Process

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Influence of the pyrolysis and heterogeneous char reactions modeling in the simulation of sugarcane bagasse gasification in a bubbling fluidized bed reactor

Cited by 13 publications

References 49 publications

State of the Art and Perspectives in Catalytic Conversion Mechanism of Biomass to Bio-aromatics

State of the Art and Perspectives in Catalytic Conversion Mechanism of Biomass to Bio-aromatics

Comparative Study of Different Two-Phase Models for the Propane Oxidative Dehydrogenation in a Bubbling Fluidized Bed Containing the VOx/γ-Al2O3 Catalyst

Effect of Pyrolysis Reactions on Coal and Biomass Gasification Process

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Comparative Study of Different Two-Phase Models for the Propane Oxidative Dehydrogenation in a Bubbling Fluidized Bed Containing the VO_x/γ-Al₂O₃ Catalyst