Numerical modeling of a downdraft plasma gasification reactor

İbrahimoğlu, Beycan; Cucen, Ahmet; Yılmazoğlu, M. Zeki

doi:10.1016/j.ijhydene.2016.06.224

Cited by 47 publications

(18 citation statements)

References 23 publications

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“…The turbulence flow is simulated by the standard k –ε mode. The kinetic parameters of eqs – were obtained from the literature. ,, The radiation model is P1, and the boundary condition is as follows in Table .…”

Section: Methodsmentioning

confidence: 99%

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Hydrogen-Rich Syngas Production from Chemical Looping Gasification of Biomass Char with CaMn_1–xFe_xO₃

2018

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The chemical looping process is considered as a suitable way to produce hydrogen and syngas. CaMnO3, CaFeO3, and CaMn1–x Fe x O3 (x = 0.2 and 0.4) perovskites were prepared via the sol–gel method. Perovskites were characterized by X-ray diffraction and thermogravimetry and tested for hydrogen-rich syngas production from steam gasification of rice husk char in a fixed bed. The effect of four types of perovskites, temperature (700–900 °C), and steam/char mass ratio (3.6–8.4) on the hydrogen yield was investigated. The results showed that the H2/CO ratio order is CaMn0.6Fe0.4O3 > CaMn0.8Fe0.2O3 > CaFeO3 > CaMnO3 at 750 °C and steam/char mass ratio of 4.8. The chemical looping steam gasification process of rice husk char with perovskites was divided into three stages: (a) uncouple oxygen, (b) catalytic gasification, and (c) partial decomposition. On the basis of CaMn0.6Fe0.4O3 as a reaction material, the best operation conditions for the hydrogen-rich syngas gasification process are 800 °C and steam/char mass ratio of 7.2. The results also demonstrated that the higher steam/char mass ratio (8.4) carried out excessive heat based on computational fluid dynamics simulation. In addition, in comparison to the gasification reaction with CaMn0.6Fe0.4O3 at the optimum condition, the yield of CO is higher by the gasification reaction without CaMn0.6Fe0.4O3. CaMn0.6Fe0.4O3 easily selects catalysis to CO than H2.

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Section: Methodsmentioning

confidence: 99%

“…The kinetic parameters of eqs 9−13 were obtained from the literature. 27,29,30 The radiation model is P1, and the boundary condition is as follows in Table 2.…”

Section: Methodsmentioning

confidence: 99%

Hydrogen-Rich Syngas Production from Chemical Looping Gasification of Biomass Char with CaMn_1–xFe_xO₃

2018

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“…The prime feature of plasma gasification is its high functioning temperature (up to 5000 °C) and rate of heating which in turn enhances the reaction rates of gasification and gas productivity. In addition, other benefits associated with it are low emissions, inertnee, fuel flexibility, inert ash formation, very high temperatures, and short reaction time [92]. Plasma gasification was performed using sawdust and wood pellets at 1200-1400 °C to obtain syngas containing 51 vol % CO and 42 vol % H 2 [93].…”

Section: Gasificationmentioning

confidence: 99%

A Review of Biomass Resources and Thermochemical Conversion Technologies

et al. 2022

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Waste biomass has the potential to produce renewable fuels and fine chemicals. Biofuels derived from agricultural, forestry, and energy crop systems are promising resources to address climate change and minimize greenhouse gas emissions. The recent advances in various thermochemical technologies for the conversion of waste biomass to value-added biofuel products are discussed. A summarized outline of thermochemical technologies such as torrefaction, liquefaction, pyrolysis, and gasification is provided. An overview of different types and sources of biomass as well as their physicochemical properties is presented. The thermochemical conversion products and their environmental benefits are considered as well.

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“…The stoichiometric reaction chemistry of these reactions is displayed in Table 5. Chemical reaction rates within an EMIPG reactor can be controlled by either the turbulence or the temperature phenomena that are occurring within it [47]. In order to accurately model the reaction kinetics within an EMIPG reactor given the previous scenario, a common method used is the finite rate chemistry/eddy dissipation (FRC/EDM) Model.…”

Section: Rate Of Feedstock Input •mentioning

confidence: 99%

CFD Modeling of a Lab-Scale Microwave Plasma Reactor for Waste-to-Energy Applications: A Review

Sedej

Mbonimpa

2021

Gases

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Rapidly increasing solid waste generation and energy demand are two critical issues of the current century. Plasma gasification, a type of waste-to-energy (WtE) technology, has the potential to produce clean energy from waste and safely destroy hazardous waste. Among plasma gasification technologies, microwave (MW)-driven plasma offers numerous potential advantages to be scaled as a leading WtE technology if its processes are well understood and optimized. This paper reviews studies on modeling experimental microwave-induced plasma gasification systems. The system characterization requires developing mathematical models to describe the multiphysics phenomena within the reactor. The injection of plasma-forming gases and carrier gases, the rate of the waste stream, and the operational power heavily influence the initiation of various chemical reactions that produce syngas. The type and kinetics of the chemical reactions taking place are primarily influenced by either the turbulence or temperature. Navier–Stokes equations are used to describe the mass, momentum, and energy transfer, and the k-epsilon model is often used to describe the turbulence within the reactor. Computational fluid dynamics software offers the ability to solve these multiphysics mathematical models efficiently and accurately.

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Numerical modeling of a downdraft plasma gasification reactor

Cited by 47 publications

References 23 publications

Hydrogen-Rich Syngas Production from Chemical Looping Gasification of Biomass Char with CaMn_1–xFe_xO₃

Hydrogen-Rich Syngas Production from Chemical Looping Gasification of Biomass Char with CaMn_1–xFe_xO₃

A Review of Biomass Resources and Thermochemical Conversion Technologies

CFD Modeling of a Lab-Scale Microwave Plasma Reactor for Waste-to-Energy Applications: A Review

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Numerical modeling of a downdraft plasma gasification reactor

Cited by 47 publications

References 23 publications

Hydrogen-Rich Syngas Production from Chemical Looping Gasification of Biomass Char with CaMn1–xFexO3

Hydrogen-Rich Syngas Production from Chemical Looping Gasification of Biomass Char with CaMn1–xFexO3

A Review of Biomass Resources and Thermochemical Conversion Technologies

CFD Modeling of a Lab-Scale Microwave Plasma Reactor for Waste-to-Energy Applications: A Review

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Hydrogen-Rich Syngas Production from Chemical Looping Gasification of Biomass Char with CaMn_1–xFe_xO₃

Hydrogen-Rich Syngas Production from Chemical Looping Gasification of Biomass Char with CaMn_1–xFe_xO₃