High-temperature ethanol steam reforming in PdCu membrane reactor

Jia, Haiyuan; Xu, Hengyong; Sheng, Xueru; Yang, Xiaodeng; Shen, Wenjie; Goldbach, Andreas

doi:10.1016/j.memsci.2020.118083

Cited by 32 publications

(21 citation statements)

References 51 publications

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“…For S/E of 12 and 21, H 2 yield increased by raising temperature below 700 • C, while this trend was almost fixed between 700 and 900 • C. This could be attributed to the high tendency of RWGS above 700 • C,36 which results in an almost similar consumption rate of H 2 in RWGS with H 2 production rate in SRE, SRM, and ED reactions. Jia et al53 reported results similar to our work at pressures of 10 and 50 bar. Compagnoni et al54 concluded that the H 2 yield was rather constant (about 60%) by…”

supporting

confidence: 91%

“…As it is clear in Figure 6, pressure had a negative effect on the experimental and calculated H 2 yield, which is well complied with the literature. 53 This indicated that SRE, ED, and SRM are not favorable at high pressure, although the sensitivity of H 2 yield to pressure was enhanced by raising the S/E in the range of 3-21. H 2 yield was elevated by raising steam content in the process feed 6A-C).…”

Section: H 2 Yieldmentioning

confidence: 98%

“…14 H 2 yield in the presence of the Ni-MMT/TiO 2 catalyst was enhanced from 35.11% to 54.55% by raising S/E between 1-10 at a temperature 500 • C. 52 Some workers inferred that H 2 yield had a straightforward relationship with the S/E variable in the range of 1-3, while it was constant by changing S/E above 3. 14,54 Jia et al 53 expressed that the highest H 2 yield will be achieved with S/E around 6 at high reaction temperatures and pressures. According to the experimental results, H 2 yield which was predicted by the kinetic model had a higher correlation with the S/E variable.…”

Section: H 2 Yieldmentioning

confidence: 99%

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Steam reforming of ethanol to hydrogen formation: Kinetic modeling and experimental investigations

Mosayebi

2021

Int J of Chemical Kinetics

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To derive the kinetic model for steam reforming of ethanol, the experiment tests were accomplished at vast working conditions (i.e., temperature: 300-900 • C, pressure: 1-11 bar, and H 2 O/C 2 H 5 OH ratio (S/E) of 3-21) on the Ni-Pt/CeO 2 catalyst in a fixed bed reactor. The physicochemical properties of the prepared catalyst were investigated by x-ray fluorescence, thermal gravimetric analysis x-ray diffractometer, and N 2 adsorption/desorption Brunauer-Emmett-Teller (BET) tests. The kinetic model was developed based on the Langmuir-Freundlich approach, and the proposed mechanism included four reversible reactions on two types of the active site. The values of estimated activation energy for four reactions were in the range of reported values by various workers. The kinetic model error to anticipate the responses was 11.96% and a well forecasted H 2 yield compared to other responses. The complete ethanol conversion reached above 700 • C at 1 bar pressure irrespective of the S/E value. The variation of CO yield in terms of temperature was very low up to 700 • C. An augmentation in S/E, enhanced ethanol conversion and H 2 yield, while these trends were reversed for CO yield and CH 4 selectivity.

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supporting

confidence: 91%

Section: H 2 Yieldmentioning

confidence: 98%

Section: H 2 Yieldmentioning

confidence: 99%

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Steam reforming of ethanol to hydrogen formation: Kinetic modeling and experimental investigations

Mosayebi

2021

Int J of Chemical Kinetics

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“…Another issue is the significant production of CO 2 as byproduct, which can be captured by sorbents, such as CaO in the sorption enhanced steam reforming processes, thus improving the H 2 yield [86]. Membrane-assisted steam reforming is also an intriguing option for H 2 production from biomass, especially in refueling stations for automotive fuel cells [87]. The energy consumption required for H 2 compression can be significantly reduced if the process supplies H 2 at high pressures.…”

Section: Remarks On Thermal Methodsmentioning

confidence: 99%

Main Hydrogen Production Processes: An Overview

et al. 2021

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Due to its characteristics, hydrogen is considered the energy carrier of the future. Its use as a fuel generates reduced pollution, as if burned it almost exclusively produces water vapor. Hydrogen can be produced from numerous sources, both of fossil and renewable origin, and with as many production processes, which can use renewable or non-renewable energy sources. To achieve carbon neutrality, the sources must necessarily be renewable, and the production processes themselves must use renewable energy sources. In this review article the main characteristics of the most used hydrogen production methods are summarized, mainly focusing on renewable feedstocks, furthermore a series of relevant articles published in the last year, are reviewed. The production methods are grouped according to the type of energy they use; and at the end of each section the strengths and limitations of the processes are highlighted. The conclusions compare the main characteristics of the production processes studied and contextualize their possible use.

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“…The H 2 and CO 2 products of ESR need to be separated for hydrogen utilization and carbon capture. However, industrial gas separation technologies such as pressure swing adsorption are not sufficiently cost-efficient for small-scale distributed hydrogen refueling stations [16]. Coupling ESR with hydrogen permeation membranes (HPM) in a membrane reactor configuration allows for the selective removal of hydrogen driven by its partial pressure difference between the catalyst bed and the permeate side of the membrane.…”

Section: Introductionmentioning

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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High-temperature ethanol steam reforming in PdCu membrane reactor

Cited by 32 publications

References 51 publications

Steam reforming of ethanol to hydrogen formation: Kinetic modeling and experimental investigations

Steam reforming of ethanol to hydrogen formation: Kinetic modeling and experimental investigations

Main Hydrogen Production Processes: An Overview

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

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