Design and demonstration of a prototype 1.5 kWth hybrid solar/autothermal steam gasifier

Muroyama, Alexander P.; Guscetti, Iacopo; Schieber, Garrett L.; Haussener, Sophia; Loutzenhiser, Peter G.

doi:10.1016/j.fuel.2017.09.059

Cited by 37 publications

(28 citation statements)

References 47 publications

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“…Chemical storage efficiency in the order of 11.0-13.2% and carbon conversion degrees of 60-80% were reported. Muroyama et al (Muroyama et al, 2014;Muroyama et al, 2018) report on the development of a 1.5 kW th hybrid solar/ autothermal Type A FB gasifier, tested in a 6 kW th high-flux solar simulator. The indirectly irradiated gasifier consisted of a cavity made of Buster M-35 (Zircar Zirconia) blocks.…”

Section: Solar-driven Gasificationmentioning

confidence: 99%

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

et al. 2021

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Thermal and thermochemical processes can be efficiently developed and carried out in fluidized beds, due to the unique properties of fluidized suspensions of solid particles and to the inherent flexibility of fluidized bed design and operation. Coupling fluidization with concentrated solar power is a stimulating cross-disciplinary field of investigation, with the related issues and opportunities to explore. In this review article the current and perspective applications of fluidized beds to collection, storage and exploitation of solar radiation are surveyed. Novel and “creative” designs of fluidized bed solar receivers/reactors are reported and critically discussed. The vast field of applications of solar-driven fluidized bed processes, from energy conversion with thermal energy storage, to solids looping for thermochemical energy storage, production of fuels, chemicals and materials, is explored with an eye at past and current developments and an outlook of future perspectives.

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Section: Solar-driven Gasificationmentioning

confidence: 99%

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

et al. 2021

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“…The solar process viability for coal and biomass gasification has been thoroughly studied at both laboratory [7][8][9][10][11][12][13] and pilot scales [14][15][16]. Accordingly, the extrapolation of these solar technologies to larger scales for semi-central or centralized green solar hydrogen production is auspicious in the future, in view of the increasing decarbonized hydrogen demand.…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Assessment of Solar-Driven Steam Gasification of Biomass for Large-Scale Hydrogen Production

2021

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Solar biomass gasification is an attractive pathway to promote biomass valorization while chemically storing intermittent solar energy into solar fuels. The economic feasibility of a solar gasification process at a large scale for centralized H2 production was assessed, based on the discounted cash-flow rate of return method to calculate the minimum H2 production cost. H2 production costs from solar-only, hybrid and conventional autothermal biomass gasification were evaluated under various economic scenarios. Considering a biomass reference cost of 0.1 €/kg, and a land cost of 12.9 €/m2, H2 minimum price was estimated at 2.99 €/kgH2 and 2.48 €/kgH2 for the allothermal and hybrid processes, respectively, against 2.25 €/kgH2 in the conventional process. A sensitivity study showed that a 50% reduction in the heliostats and solar tower costs, combined with a lower land cost of below 0.5 €/m2, allowed reaching an area of competitiveness where the three processes meet. Furthermore, an increase in the biomass feedstock cost by a factor of 2 to 3 significantly undermined the profitability of the autothermal process, in favor of solar hybrid and solar-only gasification. A comparative study involving other solar and non-solar processes led to conclude on the profitability of fossil-based processes. However, reduced CO2 emissions from the solar process and the application of carbon credits are definitely in favor of solar gasification economics, which could become more competitive. The massive deployment of concentrated solar energy across the world in the coming years can significantly reduce the cost of the solar materials and components (heliostats), and thus further alleviate the financial cost of solar gasification.

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“…To this end, fixed or fluidized bed reactors and vortex devices were developed [39][40][41]. The gasification agent is usually steam or vapor-air mixtures [42,43]. The produced combustible gas with high hydrogen content can be used for direct oxidation or stored in a gasholder [44,45].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Fuel and Steam Consumption on Characteristics of Fixed Bed Process of Woody Biomass Steam Gasification with Intensive Heat Supply

Donskoy

2021

Energy Systems Research

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Plant biomass is one of the most widespread renewable energy sources. Energy utilization of biomass allows solving some problems associated with the development of off-grid energy systems and the processing of combustible waste (primarily agricultural and forestry waste). This paper is devoted to the study of an allothermal gasification process of plant biomass materials using a kinetic-thermodynamic model developed by the author. The gasification process is considered stationary, and steam is used as a gasification agent. The power of the supplied heat is considered constant (10 kW). One of the significant tasks related to allothermal gasification is to choose flowrate parameters so that the heat supplied is efficiently used in chemical reactions without the threat of reactor overheating. The determination of the boundaries of the safe gasifier operation involved variant calculations with a view to optimizing the gasification conditions. The calculation results show that the allothermal gasification process can proceed with a thermochemical efficiency of about 70%. For each fixed fuel consumption level, there is an optimal fuel-steam ratio. The complete conversion of biomass requires sufficiently high temperatures. The produced gas contains a significant steam fraction (>50 vol%) even under optimal conditions. The calculated fraction of hydrogen in dry gas is up to 60vol%. The data obtained can be used to assess the efficiency of energy units with biomass gasification using high-temperature sources, for example, in systems that use and store solar thermal energy.

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Design and demonstration of a prototype 1.5 kWth hybrid solar/autothermal steam gasifier

Cited by 37 publications

References 47 publications

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

Techno-Economic Assessment of Solar-Driven Steam Gasification of Biomass for Large-Scale Hydrogen Production

The Influence of Fuel and Steam Consumption on Characteristics of Fixed Bed Process of Woody Biomass Steam Gasification with Intensive Heat Supply

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