CFD-based coupled multiphase modeling of biochar production using a large-scale pyrolysis plant

Khodaei, Hassan; González, L. M.; Chapela, Sergio; Porteiro, Jacobo; Nikrityuk, Petr A.; Olson, Chris

doi:10.1016/j.energy.2020.119325

Cited by 14 publications

(9 citation statements)

References 48 publications

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“…Although a number of methods have been proposed and used for wooden activated carbon production, a method and theory coupled with high efficiency and low pollution are still not reported. Computational fluid dynamics (CFD) has been an effective tool for the design and optimization of the reactor in biomass utilization, such as gasification, pyrolysis, and combustion. − Khodaei et al conducted a combined CFD simulation of the thermal conversion of biochar formation and the combustion of volatiles in an industrial pyrolysis plant. The coupled multiphase modeling of biochar production and volatile combustion was conducted.…”

Section: Introductionmentioning

confidence: 99%

Wooden Activated Carbon Production for Dioxin Removal via a Two-Step Process of Carbonization Coupled with Steam Activation from Biomass Wastes

Wei

Li²

2021

ACS Omega

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A two-step process of carbonization coupled with steam activation was proposed for wooden activated carbon production from four kinds of biomass waste materials. The TG-FTIR results show that the carbonization process started at around 250 °C and finished at 500 °C for the coconut shell, pinewood, and plywood. The carbonization temperature of corn straw was lower than those of the other three samples, which was attributed to the higher concentration of ash content. FTIR results for the volatile compounds during carbonization show that CH 4 , CO, CO 2 , and hydrocarbons are the main detected gaseous species. The CH 4 and C m H n yields of pinewood and plywood are higher than those of the coconut shell and corn straw. The carbonization results on the tubular furnace reactor show that furfural and phenol and its derivatives are the main tar compounds in waste carbonization. Carbonization experiments show that a temperature of 500 °C and residence time of 30 min are the optimized parameters for the three biomass wastes. The char yields are 26.4, 25.73, and 30.38% for pinewood, plywood, and coconut shell, respectively. CFD modeling has proven that using 20% of the volatiles could achieve lowest pollution and provide heat for carbonization of biomass waste. The steam activation results show that an activation temperature of 800 °C and activation time of 30 min are suitable for all three biomass samples, which could obtain optimized AC yields and adsorption quality for dioxin.

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Section: Introductionmentioning

confidence: 99%

Wooden Activated Carbon Production for Dioxin Removal via a Two-Step Process of Carbonization Coupled with Steam Activation from Biomass Wastes

Wei

Li²

2021

ACS Omega

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“…The main product of biomass pyrolysis, bio-oil, can be upgraded into drop-in fuels like gasoline and diesel. , More than 50 large-scale pyrolysis facilities have been built over the world. For example, the Empyro plant in The Netherlands could treat about 40 000 tons of dry lignocellulosic biomass to produce 25 000 tons of bio-oil every year …”

Section: Production Of Bio-oil From Lignocellulosic Biomassmentioning

confidence: 99%

“…For example, the Empyro plant in The Netherlands could treat about 40 000 tons of dry lignocellulosic biomass to produce 25 000 tons of bio-oil every year. 54 …”

Section: Production Of Bio-oil From Lignocellulosic Biomassmentioning

confidence: 99%

Thermochemical Conversion of Lignocellulosic Biomass into Mass-Producible Fuels: Emerging Technology Progress and Environmental Sustainability Evaluation

Liu

2021

ACS Environ. Au

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Lignocellulosic biomass is increasingly recognized as a carbon-neutral resource rather than an organic solid waste nowadays. It can be used for the production of various value-added chemicals and biofuels like bio-oil. However, the undesirable properties of bio-oil such as chemical instability, low heating value, high corrosivity, and high viscosity are greatly restricting the utilization of bio-oil as a drop-in fuel. As a consequence, bio-oil should be upgraded. Recently, several emerging methods, such as electrocatalytic hydrogenation, atmospheric distillation, and plasma-assisted catalysis, have been developed for improving the bio-oil quality under mild conditions. Here, we overview the new knowledge on the molecular structure of lignocellulosic biomass gained over the past years and discuss the future challenges and opportunities for further advances of the bio-oil production and upgrading from lignocellulosic biomass. The development of sustainable biomass resource recycle systems with improved efficiency and minimized environmental impacts is analyzed in details. Also, their environmental impacts and sustainability are evaluated. Lastly, the remaining knowledge gaps are identified, and the future research needs that may lead to massive production of biofuels from lignocellulosic biomass are highlighted.

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“…The system type and the operational parameters of pyrolysis will greatly influence the relative contributions of the gas, liquid and solid products. For instance, the slow pyrolysis process is performed with a low heating rate and long vapor residence time, which are conditions that lead to maximum solid product yield [19,20]. The operator can achieve a desirable product mix by optimizing process parameters such as feedstock flow rate, moisture content of fuel, reactor temperature and pressure, heating rate through the pyrolyzer, and residence time within the reactor.…”

Section: Introduction 1necessity Of the Mattermentioning

confidence: 99%

Development and Comparison of Thermodynamic Equilibrium and Kinetic Approaches for Biomass Pyrolysis Modeling

2022

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Biomass pyrolysis is considered as a thermochemical conversion system that is performed under oxygen-depleted conditions. A large body of literature exists in which thermodynamic equilibrium (TE) and kinetic approaches have been applied to predict pyrolysis products. However, the reliability, accuracy and predictive power of both modeling approaches is an area of concern. To address these concerns, in this paper, two new simulation models based on the TE and kinetic approaches are developed using Aspen Plus, to analyze the performance of each approach. Subsequently, the results of two models are compared with modeling and experimental results available in the literature. The comparison shows that, on the one hand, the performance of the TE approach is not satisfactory and cannot be used as an effective way for pyrolysis modeling. On the other hand, the results generated by the new model based on the kinetic approach suggests that this approach is suitable for modeling biomass pyrolysis processes. Calculation of the root mean square error (RMS), to quantify the deviation of the model results from the experiment results, confirms that this kinetic model presents superior agreement with experimental data in comparison with other kinetic models in the literature. The acquired RMS for the developed kinetic method in this paper varies within the span of 1.2 to 3.2 depending on temperature (400–600 °C) and various feedstocks (pine spruce sawdust, bagasse, wood bark, beech wood and paddy straw).

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CFD-based coupled multiphase modeling of biochar production using a large-scale pyrolysis plant

Cited by 14 publications

References 48 publications

Wooden Activated Carbon Production for Dioxin Removal via a Two-Step Process of Carbonization Coupled with Steam Activation from Biomass Wastes

Wooden Activated Carbon Production for Dioxin Removal via a Two-Step Process of Carbonization Coupled with Steam Activation from Biomass Wastes

Thermochemical Conversion of Lignocellulosic Biomass into Mass-Producible Fuels: Emerging Technology Progress and Environmental Sustainability Evaluation

Development and Comparison of Thermodynamic Equilibrium and Kinetic Approaches for Biomass Pyrolysis Modeling

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