Sequence-based Process Modeling of Fluidized Bed Biomass Gasification

Hamid Asadi-Saghandi, Amir Sheikhi, Rahmat Sotudeh-Gharebagh

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Despite tremendous effort to model fluidized bed biomass gasifiers, as major sustainable waste-to-energy devices, current equation-oriented approaches suffer from implementation difficulties. In this research, a comprehensive cocurrent sequence-based process model is introduced to simulate bottom-fed bubbling fluidized bed biomass gasifiers (BFBGs). The gasifiers include two operating regions, namely dense bed and freeboard. The dense bed is divided into several sections of logically ordered ideal reactors to describe the behavior of interacting phases, i.e., bubble and emulsion. The bubble phase is well characterized by an ideal plug flow reactor (PFR), and the emulsion phase is simulated as a continuous stirred-tank reactor (CSTR). The freeboard is successfully mimicked with a PFR. Hydrodynamic and kinetic submodels describe physical and chemical phenomena taking place in the gasifiers, respectively. A dynamic two phase model is adopted as the hydrodynamic submodel, and the kinetic submodel is derived from the literature. Several sets of experimental data from biomass gasifiers with various biomass feedstocks are analyzed to evaluate the reliability of the proposed model. Close agreement between the experimental data and the model shows that the proposed simple and in-hand method is able to predict the behavior of complex BFBGs. Finally, the modeling package is used to optimize the hydrogen production, H2/CO, and hazardous gas emission in BFBGs. The proposed model can be integrated into the industrial process simulators such as AspenOne modules to represent highly nonideal reactors.

Original languageEnglish (US)
Pages (from-to)2640-2651
Number of pages12
JournalACS Sustainable Chemistry and Engineering
Volume3
Issue number11
DOIs
StatePublished - Sep 9 2015

Fingerprint

Gasification
Fluidized beds
Biomass
biomass
modeling
emulsion
Emulsions
bubble
Hydrodynamics
hydrodynamics
chemical phenomena
kinetics
Kinetics
physical phenomena
Carbon Monoxide
Hydrogen production
Gas emissions
Feedstocks
simulator
gasification

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

Cite this

Asadi-Saghandi, Hamid ; Sheikhi, Amir ; Sotudeh-Gharebagh, Rahmat. / Sequence-based Process Modeling of Fluidized Bed Biomass Gasification. In: ACS Sustainable Chemistry and Engineering. 2015 ; Vol. 3, No. 11. pp. 2640-2651.
@article{677aa18859d04bf2931751fc162119ef,
title = "Sequence-based Process Modeling of Fluidized Bed Biomass Gasification",
abstract = "Despite tremendous effort to model fluidized bed biomass gasifiers, as major sustainable waste-to-energy devices, current equation-oriented approaches suffer from implementation difficulties. In this research, a comprehensive cocurrent sequence-based process model is introduced to simulate bottom-fed bubbling fluidized bed biomass gasifiers (BFBGs). The gasifiers include two operating regions, namely dense bed and freeboard. The dense bed is divided into several sections of logically ordered ideal reactors to describe the behavior of interacting phases, i.e., bubble and emulsion. The bubble phase is well characterized by an ideal plug flow reactor (PFR), and the emulsion phase is simulated as a continuous stirred-tank reactor (CSTR). The freeboard is successfully mimicked with a PFR. Hydrodynamic and kinetic submodels describe physical and chemical phenomena taking place in the gasifiers, respectively. A dynamic two phase model is adopted as the hydrodynamic submodel, and the kinetic submodel is derived from the literature. Several sets of experimental data from biomass gasifiers with various biomass feedstocks are analyzed to evaluate the reliability of the proposed model. Close agreement between the experimental data and the model shows that the proposed simple and in-hand method is able to predict the behavior of complex BFBGs. Finally, the modeling package is used to optimize the hydrogen production, H2/CO, and hazardous gas emission in BFBGs. The proposed model can be integrated into the industrial process simulators such as AspenOne modules to represent highly nonideal reactors.",
author = "Hamid Asadi-Saghandi and Amir Sheikhi and Rahmat Sotudeh-Gharebagh",
year = "2015",
month = "9",
day = "9",
doi = "10.1021/acssuschemeng.5b00392",
language = "English (US)",
volume = "3",
pages = "2640--2651",
journal = "ACS Sustainable Chemistry and Engineering",
issn = "2168-0485",
publisher = "American Chemical Society",
number = "11",

}

Sequence-based Process Modeling of Fluidized Bed Biomass Gasification. / Asadi-Saghandi, Hamid; Sheikhi, Amir; Sotudeh-Gharebagh, Rahmat.

In: ACS Sustainable Chemistry and Engineering, Vol. 3, No. 11, 09.09.2015, p. 2640-2651.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Sequence-based Process Modeling of Fluidized Bed Biomass Gasification

AU - Asadi-Saghandi, Hamid

AU - Sheikhi, Amir

AU - Sotudeh-Gharebagh, Rahmat

PY - 2015/9/9

Y1 - 2015/9/9

N2 - Despite tremendous effort to model fluidized bed biomass gasifiers, as major sustainable waste-to-energy devices, current equation-oriented approaches suffer from implementation difficulties. In this research, a comprehensive cocurrent sequence-based process model is introduced to simulate bottom-fed bubbling fluidized bed biomass gasifiers (BFBGs). The gasifiers include two operating regions, namely dense bed and freeboard. The dense bed is divided into several sections of logically ordered ideal reactors to describe the behavior of interacting phases, i.e., bubble and emulsion. The bubble phase is well characterized by an ideal plug flow reactor (PFR), and the emulsion phase is simulated as a continuous stirred-tank reactor (CSTR). The freeboard is successfully mimicked with a PFR. Hydrodynamic and kinetic submodels describe physical and chemical phenomena taking place in the gasifiers, respectively. A dynamic two phase model is adopted as the hydrodynamic submodel, and the kinetic submodel is derived from the literature. Several sets of experimental data from biomass gasifiers with various biomass feedstocks are analyzed to evaluate the reliability of the proposed model. Close agreement between the experimental data and the model shows that the proposed simple and in-hand method is able to predict the behavior of complex BFBGs. Finally, the modeling package is used to optimize the hydrogen production, H2/CO, and hazardous gas emission in BFBGs. The proposed model can be integrated into the industrial process simulators such as AspenOne modules to represent highly nonideal reactors.

AB - Despite tremendous effort to model fluidized bed biomass gasifiers, as major sustainable waste-to-energy devices, current equation-oriented approaches suffer from implementation difficulties. In this research, a comprehensive cocurrent sequence-based process model is introduced to simulate bottom-fed bubbling fluidized bed biomass gasifiers (BFBGs). The gasifiers include two operating regions, namely dense bed and freeboard. The dense bed is divided into several sections of logically ordered ideal reactors to describe the behavior of interacting phases, i.e., bubble and emulsion. The bubble phase is well characterized by an ideal plug flow reactor (PFR), and the emulsion phase is simulated as a continuous stirred-tank reactor (CSTR). The freeboard is successfully mimicked with a PFR. Hydrodynamic and kinetic submodels describe physical and chemical phenomena taking place in the gasifiers, respectively. A dynamic two phase model is adopted as the hydrodynamic submodel, and the kinetic submodel is derived from the literature. Several sets of experimental data from biomass gasifiers with various biomass feedstocks are analyzed to evaluate the reliability of the proposed model. Close agreement between the experimental data and the model shows that the proposed simple and in-hand method is able to predict the behavior of complex BFBGs. Finally, the modeling package is used to optimize the hydrogen production, H2/CO, and hazardous gas emission in BFBGs. The proposed model can be integrated into the industrial process simulators such as AspenOne modules to represent highly nonideal reactors.

UR - http://www.scopus.com/inward/record.url?scp=84946110269&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84946110269&partnerID=8YFLogxK

U2 - 10.1021/acssuschemeng.5b00392

DO - 10.1021/acssuschemeng.5b00392

M3 - Article

AN - SCOPUS:84946110269

VL - 3

SP - 2640

EP - 2651

JO - ACS Sustainable Chemistry and Engineering

JF - ACS Sustainable Chemistry and Engineering

SN - 2168-0485

IS - 11

ER -