Establishment of kinetic parameters of particle reaction from a well-stirred fluidized bed reactor

Haustein, Herman D.; Kreitzberg, Thobias; Gövert, Benjamin Maximilian; Maßmeyer, A.; Kneer, Reinhold

doi:10.1016/j.fuel.2015.05.038

Cited by 26 publications

(15 citation statements)

References 18 publications

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“…Therefore, when the flue gas flows to the gas analyzer, the mixing of gas species could affect the original signal and cause errors. Many researchers have focused on this problem for years and concluded that the deconvolution of the gas concentration data may help [40,42]. However, in some cases, the deconvolution method could still fail.…”

Section: Introductionmentioning

confidence: 99%

CaO carbonation kinetics determined using micro-fluidized bed thermogravimetric analysis

Wang

et al. 2020

Fuel

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Section: Introductionmentioning

confidence: 99%

CaO carbonation kinetics determined using micro-fluidized bed thermogravimetric analysis

Wang

et al. 2020

Fuel

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“…Via a FB reactor with the inner diameter of 22 mm and an overall length of 870 mm, Schwebela et al 20 conducted the chemical looping combustion experiments and finally obtained the apparent kinetic parameters by fitting to different model approaches. To measure the kinetic parameters of the particle reaction in gasification, a self-made FB reaction analyzer, with a diameter of 34 mm and a typical fluidized height fluctuating around 70 mm, was established by Haustein et al 21 The gasification behavior in this FB reactor was examined and further compared to the TGA method. After reviewing this literature, we can see that, as a result of the lack of systematical research in hydrodynamics, the structure and parameter of the FB reactor adopted were diverse, making an obvious difference in reaction behavior even for the same reaction.…”

Section: Introductionmentioning

confidence: 99%

“…Many other reactors, including mesh reactor, drop-tube furnace, FB, etc., have also been used to measure the gas–solid reaction behavior and calculate kinetic parameters, but for these analyzers, there are no standardized analytical approaches and customized instruments, which still suffer from the limitations of an uneven temperature distribution in the reactor, serious gas back mixing, and diffusion. − Consequently, the kinetic data reported in the literature were always much different, even for the same feedstock and under nearly approximate experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Distinctive Hydrodynamics of a Micro Fluidized Bed and Its Application to Gas–Solid Reaction Analysis

et al. 2017

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The measurement and analysis of reaction behavior, kinetics quantification, and mechanism clarification for gas–solid reactions are essential to the research and development of process technologies in fields of chemical engineering, energy production, mineral processing, etc. By far, different approaches and instruments have been applied for gas–solid reaction analysis and measurement, but a recent development appears distinctive because of its use of a micro fluidized bed (MFB) in implementing the so-called isothermal differential analysis of gas–solid reactions at the Institute of Process Engineering, Chinese Academy of Sciences (CAS). Systematic work has been reported on hydrodynamic studies in MFBs and the standardized development as well as its utilization of the so-called micro fluidized bed reaction analyzer (MFBRA) for investigating various particle-involved reactions, such as pyrolysis, combustion, gasification, reduction, catalysis, absorption, etc. The obtained results well demonstrated the distinctiveness of MFBs from the common large-size fluidized beds and the obvious advantages of the MFBRA for reaction analysis in aspects of rapid heating of the reactant sample, minimization of diffusion limitation to the reaction, real-time online capture of isothermal product formation characteristics, etc. It was shown that MFBRA is particularly capable of analyzing rapid complex reactions and providing some exceptional functions, such as steam atmosphere, online particle sampling, and decoupling of complex reactions in series. A series of applications well verified that the MFBRA provides actually a fundamental approach and the kind of instruments that are complementary to those of thermogravimetric analysis (TGA) for gas–solid reaction measurement and analysis.

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“…Bews et al first determined the kinetic parameters and reaction mechanism of the combustion of graphite using a small FBR (Bews et al, 2001). Subsequently, Fennell et al (2009) further developed this method to study the kinetics of burning of coal char in a FBR with a fast-response gas analyser of CO/CO2 (Álvarez et al, 2011;Haustein et al, 2015). More recently, Haustein et al also used a small-scale FBR with Fourier Transform Infrared (FTIR) spectroscopy to study the kinetic parameters of char combustion and gasification (Haustein et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Compared with the existing kinetic studies of coal char combustion for FBR, there is a dearth of literature regarding air and oxy-fuel combustion of biomass when employing a FBR. Much of the previous work has focused on the kinetically-controlled oxidation reaction of char in different oxidising gases (Fennell et al, 2009;Gövert et al, 2017;Haustein et al, 2015;Morin et al, 2018). The apparent kinetics of air and oxy-fuel combustion of raw biomass by the FBR method and the effects of devolatilisation and volatile matter combustion on the kinetics measurement of char have not been well investigated.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the apparent kinetics of air and oxy-fuel biomass combustion in a spout fluidised-bed reactor

Yan

Clough

Anthony

2020

Chemical Engineering Research and Design

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A bench-scale spouted fluidised-bed reactor was used to investigate the combustion kinetics of pulverised woody biomass under air and oxy-fuel atmospheres. Bed temperatures were in the range of 923-1073 K and O2 concentrations were varied from 20-35 vol%. The activation energies and apparent orders of reaction were calculated for air and oxy-fuel combustion by means of an n th order Arrhenius equation approach. Results indicated that the apparent order of reaction for both air and oxy-fuel combustion was approximately zero. The activation energies were calculated assuming a zero-order reaction mechanism and were averaged over all oxygen concentrations for air and oxy-fuel combustion and found to be 18.95 kJ/mol and 26.93 kJ/mol, respectively. The rate of combustion under oxy-fuel conditions was, on average, 37.5% higher compared to air combustion. The shrinking core model with a reaction-controlled step was found to accurately represent the biomass combustion reactions under both air and oxy-fuel conditions.

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Establishment of kinetic parameters of particle reaction from a well-stirred fluidized bed reactor

Cited by 26 publications

References 18 publications

CaO carbonation kinetics determined using micro-fluidized bed thermogravimetric analysis

CaO carbonation kinetics determined using micro-fluidized bed thermogravimetric analysis

Distinctive Hydrodynamics of a Micro Fluidized Bed and Its Application to Gas–Solid Reaction Analysis

Investigation of the apparent kinetics of air and oxy-fuel biomass combustion in a spout fluidised-bed reactor

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