Rapid Solar-thermal Decarbonization of Methane in a Fluid-wall Aerosol Flow Reactor -- Fundamentals and Application

Wyss, Jeffrey; Martinek, Janna; Kerins, Michael; Dahl, Jaimee K.; Weimer, Alan W.; Lewandowski, A.; Bingham, Carl

doi:10.2202/1542-6580.1311

Cited by 26 publications

(32 citation statements)

References 13 publications

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“…A challenge of estimating the extra methane needed for the dissociation is that the operating temperature range of reactions (5) and (6) is large, so the heat that can be recovered from high temperature products for the preheating of methane depends on the operating temperature. Some investigations show that the conversion of methane to carbon black increases with increasing temperature [17][18][19]. A value close to 100% has been observed when the temperature is higher than 1,900 o C [17].…”

Section: Solar-based Methane Decarbonizationmentioning

confidence: 93%

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Integrated fossil fuel and solar thermal systems for hydrogen production and CO2 mitigation

Wang

Naterer

2014

International Journal of Hydrogen Energy

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In most current fossil-based hydrogen production methods, the thermal energy required by the endothermic processes of the hydrogen production process is supplied by the combustion of a portion of the same fossil fuel feedstock. This increases the fossil fuel consumption and greenhouse gas emissions. This paper analyzes the thermodynamics of several typical fossil fuel-based hydrogen production methods such as steaam methane reforming, coal gasification, methane dissociation, and off-gas reforming, to quantify the potential savings of fossil fuels and CO2 emissions associated with the thermal energy requirement. Then matching the heat quality and quantity by solar thermal energy for different processes is examined. It is concluded that steam generation and superheating by solar energy for the supply of gaseous reactants to the hydrogen production cycles is particularly attractive due to the engineering maturity and simplicity. It is also concluded that steam-methane reforming may have fewer engineering challenges because of its single-phase reaction, if the endothermic reaction enthalpy of syngas production step (CO and H2) of coal gasification and steam methane reforming is provided by solar thermal energy.Various solar thermal energy based reactors are discussed for different types of production cycles as well.

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Section: Solar-based Methane Decarbonizationmentioning

confidence: 93%

“…Another methane-based hydrogen production method is the thermal dissociation of methane to produce hydrogen and high value carbon black. This process is also called "methane decarbonization" [17][18][19][20][21]. The dissociation reaction is given as follows:…”

Section: Solar-based Methane Decarbonizationmentioning

confidence: 99%

Integrated fossil fuel and solar thermal systems for hydrogen production and CO2 mitigation

Wang

Naterer

2014

International Journal of Hydrogen Energy

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“…Some investigators have studied fundamental aspects of gasification of biomass, gasification of charcoal or pyrolysis [17] [31]. Others have modeled solar-thermal reactors for the dissociation of metal oxides [32] or the decarbonization of methane [33]. However, these models were developed with the goal of providing a better understanding of the system, so they include many details that cause their computational times to be extremely long.…”

Section: Introductionmentioning

confidence: 99%

Model predictive control of a solar-thermal reactor

2014

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DateThe final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline.iii can preserve product quality and maintain stable product compositions, resulting in a more efficient and cost-effective operation, which can ultimately lead to scale-up and commercialization of solar thermochemical technologies. ABSTRACTIn this work, we propose a model predictive control (MPC) system for a solar-thermal reactor for the steam-gasification of biomass. The proposed controller aims at rejecting the disturbances in solar irradiation caused by the presence of clouds. A first-principles dynamic model of the process was developed. The model was used to study the dynamic responses of the process variables and to identify a linear time-invariant model used in the MPC algorithm.To provide an estimation of the disturbances for the control algorithm, a one-minute-ahead direct normal irradiance (DNI) predictor was developed. The proposed predictor utilizes information obtained through the analysis of sky images, in combination with current atmospheric measurements, to produce the DNI forecast.In the end, a robust controller was designed capable of rejecting disturbances within the operating region. Extensive simulation experiments showed that the controller outperforms a iv finely-tuned multi-loop feedback control strategy. The results obtained suggest that our controller is suitable for practical implementation.v

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“…In indirectly irradiated reactors, the incident radiation is absorbed by a chemically inert solid and then transferred to the chemical reaction by conduction, convection, and radiation through an intermediate heat transfer medium (solid, fluid, or multiphase), e.g., Refs. [6,14,23].…”

Section: Introductionmentioning

confidence: 99%

Review of Heat Transfer Research for Solar Thermochemical Applications

Lipiński¹,

Davidson

Haussener

et al. 2013

Journal of Thermal Science and Engineering Applications

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This article reviews the progress, challenges and opportunities in heat transfer research as applied to high-temperature thermochemical systems that use high-flux solar irradiation as the source of process heat. Selected pertinent areas such as radiative spectroscopy and tomography-based heat and mass characterization of heterogeneous media, kinetics of high-temperature heterogeneous reactions, heat and mass transfer modeling of solar thermochemical systems, and thermal measurements in high-temperature systems are presented, with brief discussions of their methods and example results from selected applications.

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Rapid Solar-thermal Decarbonization of Methane in a Fluid-wall Aerosol Flow Reactor -- Fundamentals and Application

Cited by 26 publications

References 13 publications

Integrated fossil fuel and solar thermal systems for hydrogen production and CO2 mitigation

Integrated fossil fuel and solar thermal systems for hydrogen production and CO2 mitigation

Model predictive control of a solar-thermal reactor

Review of Heat Transfer Research for Solar Thermochemical Applications

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