Experimental and modeling studies of Portuguese peach stone gasification on an autothermal bubbling fluidized bed pilot plant

Monteiro, Eliseu; Ismail, Tamer M.; Ramos, Ana; El-Salam, M. Abd; Brito, Paulo; Rouboa, Abel

doi:10.1016/j.energy.2017.10.100

Cited by 56 publications

(25 citation statements)

References 79 publications

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“…The third peak Figure 4 allows us to conclude that BSG are perfectly integrated within the group of lignocellulosic biomasses with an H/C ratio of 0.14 and an O/C ratio of 1.25. Therefore, according to the Van Krevelen diagram, BSG have good thermal properties when compared with other biomass materials such as forest residues [39], eucalyptus [40], coffee husks [41], peach stone [42], and miscanthus [43]. These results of the chemical analysis of BSG are consistent with values reported in the literature [30,44,45].…”

Section: Thermogravimetric Analysis (Tga)supporting

confidence: 88%

Experimental Analysis of Brewers’ Spent Grains Steam Gasification in an Allothermal Batch Reactor

et al. 2019

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In this work, brewers’ spent grains (BSG) were evaluated and studied in order to obtain a combustible gas by means of allothermal steam gasification. BSG were preprocessed in a rotary dryer and a pelletizer prior to gasification in an indirectly heated batch reactor. BSG characterization was conducted by means of proximate, ultimate, and thermogravimetric analysis, allowing us to conclude that BSG have characteristics comparable to those of regular lignocellulosic biomasses. Gasification tests were performed in an allothermal bench-scale batch reactor in order to determine the effect of temperature and steam-to-biomass ratio (S/B) in the produced gas. The produced gas was mainly composed of 22.8–30.2% H2, 15.1–22.3% CO, and 7.2–11.1% CH4, contributing to a heating value of 8.11–9.0 MJ/Nm3 with the higher values found for a low S/B ratio and for high temperatures. The performance of the process was assessed by evaluating the cold gas and carbon conversion efficiencies. These indicators were found to be in the ranges 47.0%–52.1% and 57.0%–62.7%, respectively. The main conclusion of this work is that the produced gas obtained from BSG steam gasification has sufficient quality to open other options to beer producers to use their own brewing wastes to satisfy their energy needs, allowing them to progress toward the circular economy concept.

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Section: Thermogravimetric Analysis (Tga)supporting

confidence: 88%

Experimental Analysis of Brewers’ Spent Grains Steam Gasification in an Allothermal Batch Reactor

et al. 2019

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“…Dividing Equation (27) by RT and setting the partial derivatives equal to zero, we find the extreme point.…”

Section: Non-stoichiometric Modelingmentioning

confidence: 99%

“…Finally, replacing the value of G total from Equation (25) in Equation (27) and taking its partial derivatives the Gibbs free energy can be expressed as follows:…”

Section: ∂L ∂Nmentioning

confidence: 99%

“…Other advances have been achieved like the fragmentation of fuels during gasification and combustion [22]. This refined approach is generally accomplished using commercial software, which have been practiced by several authors [23][24][25][26][27]. In order to explore the several geometries and operating conditions of a reactor CFD is seen as an economical option to investigate the ideal configuration considering the project specifications.…”

Section: Introductionmentioning

confidence: 99%

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A Holistic Review on Biomass Gasification Modified Equilibrium Models

et al. 2019

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Biomass gasification is realized as a settled process to produce energy in a sustainable form, between all the biomass-based energy generation routes. Consequently, there are a renewed interest in biomass gasification promoting the research of different mathematical models to enlighten and comprehend gasification process complexities. This review is focused on the thermodynamic equilibrium models, which is the class of models that seems to be more developed. It is verified that the review articles available in the literature do not address non-stoichiometric methods, as well as an ambiguous categorization of stoichiometric and non-stoichiometric methods. Therefore, the main purpose of this article is to review the non-stoichiometric equilibrium models and categorize them, and review the different stoichiometric equilibrium model’s categorization available in the literature. The modeling procedures adopted for the different modeling categories are compared. Conclusion can be drawn that almost all equilibrium models are modified by the inclusion of empirical correction factors that improves the model prediction capabilities but with loss of generality.

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“…The following values have been used for the model constants Monteiro et al (2018) C e1 = 1.44 and C e2 = 1.92, the turbulent Prandtl numbers for k and e. are r k = 1 and r e = 1.3, respectively.…”

Section: Setting Of Unit Modulesmentioning

confidence: 99%

Assessment of coal gasification in a pressurized fixed bed gasifier using an ASPEN plus and Euler–Euler model

Ismail

Chen

et al. 2020

Int J Coal Sci Technol

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With the help of Aspen Plus, a two-dimensional unsteady CFD model is developed to simulate the coal gasification process in a fixed bed gasifier. A developed and validated two dimensional CFD model for coal gasification has been used to predict and assess the viability of the syngas generation from coal gasification employing the updraft fixed bed gasifier. The process rate model and the sub-model of gas generation are determined. The particle size variation and char burning during gasification are also taken into account. In order to verify the model and increase the understanding of gasification characteristics, a set of experiments and numerical comparisons have been carried out. The simulated results in the bed are used to predict the composition of syngas and the conversion of carbon. The model proposed in this paper is a promising tool for simulating the coal gasification process in a fixed bed gasifier.

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Experimental and modeling studies of Portuguese peach stone gasification on an autothermal bubbling fluidized bed pilot plant

Cited by 56 publications

References 79 publications

Experimental Analysis of Brewers’ Spent Grains Steam Gasification in an Allothermal Batch Reactor

Experimental Analysis of Brewers’ Spent Grains Steam Gasification in an Allothermal Batch Reactor

A Holistic Review on Biomass Gasification Modified Equilibrium Models

Assessment of coal gasification in a pressurized fixed bed gasifier using an ASPEN plus and Euler–Euler model

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