Kinetic and thermodynamic analyses of mid/low-temperature ammonia decomposition in solar-driven hydrogen permeation membrane reactor

Wang, Bingzheng; Kong, Hui; Wang, Hongsheng; Wang, Yipu; Hu, Xuejiao

doi:10.1016/j.ijhydene.2019.08.175

Cited by 58 publications

(22 citation statements)

References 46 publications

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“…Therefore, in order to avoid additional compression costs [46][47][48] and derived emissions (estimates are about 6.0 kW h kg −1 for compression of H 2 to 70 MPa, which leads to approximately 1.3 kg of CO 2 per kg of hydrogen), 49 high pressure ammonia decomposition would be preferred, in spite of the obvious thermodynamic limitations. 50,51 Surprisingly, to the best of our knowledge, this is among the first publications on this topic.…”

Section: Introductionmentioning

confidence: 89%

High pressure ammonia decomposition on Ru–K/CaO catalysts

Sayas

Morlanés

Katikaneni

et al. 2020

Catal. Sci. Technol.

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Section: Introductionmentioning

confidence: 89%

High pressure ammonia decomposition on Ru–K/CaO catalysts

Sayas

Morlanés

Katikaneni

et al. 2020

Catal. Sci. Technol.

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“…where n H 2 and n E are the molar amount of generated hydrogen and consumed ethanol; HHV H 2 and HHV E are the molar higher heating value of hydrogen and ethanol, taken as 286 kJ•mol −1 and 1410 kJ•mol −1 [40]; η opt is the optical efficiency of the trough solar collector, taken as 73% [41]; η abs exhibited by Equation (3) is the absorption efficiency of the collector, expressed as [42]…”

Section: Theoretical Formulationsmentioning

confidence: 99%

Thermodynamic Assessment of a Solar-Driven Integrated Membrane Reactor for Ethanol Steam Reforming

Wang

Lundin

et al. 2021

Molecules

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To efficiently convert and utilize intermittent solar energy, a novel solar-driven ethanol steam reforming (ESR) system integrated with a membrane reactor is proposed. It has the potential to convert low-grade solar thermal energy into high energy level chemical energy. Driven by chemical potential, hydrogen permeation membranes (HPM) can separate the generated hydrogen and shift the ESR equilibrium forward to increase conversion and thermodynamic efficiency. The thermodynamic and environmental performances are analyzed via numerical simulation under a reaction temperature range of 100–400 °C with permeate pressures of 0.01–0.75 bar. The highest theoretical conversion rate is 98.3% at 100 °C and 0.01 bar, while the highest first-law efficiency, solar-to-fuel efficiency, and exergy efficiency are 82.3%, 45.3%, and 70.4% at 215 °C and 0.20 bar. The standard coal saving rate (SCSR) and carbon dioxide reduction rate (CDRR) are maximums of 101 g·m−2·h−1 and 247 g·m−2·h−1 at 200 °C and 0.20 bar with a hydrogen generation rate of 22.4 mol·m−2·h−1. This study illustrates the feasibility of solar-driven ESR integrated with a membrane reactor and distinguishes a novel approach for distributed hydrogen generation and solar energy utilization and upgradation.

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“…Sui et al [67] reported an exploration on an efficient solar thermochemical water-splitting system enhanced by hydrogen permeation membrane, which has showed a sharply enhanced conversion rate of 87.8% at 1500°C and 10 À5 bar at permeated side (versus 1.26% with oxygen permeation membrane or isothermal thermochemical cycle). Recently, a promising method for hydrogen generation without carbon emitting by ammonia decomposition in a catalytic palladium membrane reactor for hydrogen separation driven by solar energy has been theoretically proposed, and the first-law thermodynamic efficiency, net solar-to-hydrogen efficiency, and exergy efficiency can reach as high as 86.86, 40.08, and 72.07%, respectively [68].…”

Section: Hydrogen Permeation Membrane For Hydrogen Generationmentioning

confidence: 99%

Solar Thermochemical Fuel Generation

Wang¹

2020

Wind Solar Hybrid Renewable Energy System

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Solar energy is one of the most abundant, clean, and widespread energy in the world, which has the potential to address the issues of environmental pollution, global warming, and energy crisis, while the intermittent distribution of solar energy in time and space limits its utilization. Among various approaches of solar energy utilization, converting solar energy into chemical fuel (e.g., hydrogen) by thermochemical approach could maintain the steady and high-efficient energy supply and can make use of the full-spectrum solar energy. The research about solar thermochemical fuel generation lasts more than 40 years, and lots of reaction system and reactors have been proposed. This chapter reviews the state-of-the-art progress of solar thermochemical fuel generation, and the characteristics of different systems have been compared and discussed, which may give systematical insight into the development and improvement of solar fuel generation by thermochemical approach in the future.

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Kinetic and thermodynamic analyses of mid/low-temperature ammonia decomposition in solar-driven hydrogen permeation membrane reactor

Cited by 58 publications

References 46 publications

High pressure ammonia decomposition on Ru–K/CaO catalysts

High pressure ammonia decomposition on Ru–K/CaO catalysts

Thermodynamic Assessment of a Solar-Driven Integrated Membrane Reactor for Ethanol Steam Reforming

Solar Thermochemical Fuel Generation

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