New means of hydrogen storage – the potentials of methanol as energy storage for excessive windpower in North Germany

Gulden, Johannes; Sklarow, Andreas; Luschtinetz, Thomas

doi:10.1051/e3sconf/20187001004

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Methanol has a high hydrogen-to-carbon ratio when compared to other hydrocarbons, and its sulfur content and reforming temperature are much lower, which is important for fuel cell utilization [10]. The hydrogen stored in methanol is considered stable, not flammable, and has a high energy density when compared to pressure-vessel-stored hydrogen [11]. Among various methanol reforming processes, the steam reforming of methanol (SRM) reaction has the advantages of a high ratio of hydrogen generation and low CO generation [12].…”

Section: Introductionmentioning

confidence: 99%

A Swiss-Roll-Type Methanol Mini-Steam Reformer for Hydrogen Generation with High Efficiency and Long-Term Durability

Tseng,

Chiu,

Huang

2023

Micromachines

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This paper proposes a Swiss-roll-type mini-reformer employing a copper–zinc catalyst for high-efficient SRM process. Although the commercially available copper–zinc catalysts commonly used in cylindrical-type reformers provide decent conversion rates in the short term, their long-term durability still requires improvement, mainly due to temperature variations in the reformer, catalyst loading, and thermal sintering issues. This Swiss-roll-shaped mini-reformer is designed to improve thermal energy preservation/temperature uniformity by using dual spiral channels to improve the long-term durability while maintaining methanol-reforming efficiency. It was fabricated on a copper plate that was 80 mm wide, 80 mm long, and 4 mm high with spiral channels that were 2 mm deep, 4 mm wide, and 350 mm long. To optimize the design and reformer operation, the catalyst porosity, gas hourly speed velocity (GHSV), operation temperature, and fuel feeding rate are investigated. Swiss-roll-type reformers may require higher driving pressures but can provide better thermal energy preservation and temperature uniformity, posing a higher conversion rate for the same amount of catalyst when compared with other geometries. By carefully adjusting the catalyst bed porosity, locations, and catalyst loading amount as well as other conditions, an optimized gas hourly space velocity (GHSV) can be obtained (14,580 mL/g·h) and lead to not only a high conversion rate (96%) and low carbon monoxide generation rate (0.98%) but also a better long-term durability (decay from 96% to 88.12% after 60 h operation time) for SRM processes. The decay rate, 0.13%/h, after 60 h of operation, is five-folds lower than that (0.67%/h, 0.134%/h) of a commercial cylindrical-type fixed-bed reactor with a commercial catalyst.

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Section: Introductionmentioning

confidence: 99%

A Swiss-Roll-Type Methanol Mini-Steam Reformer for Hydrogen Generation with High Efficiency and Long-Term Durability

Tseng,

Chiu,

Huang

2023

Micromachines

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Hydrogen Storage and Transportation Technologies to Enable the Hydrogen Economy: Liquid Organic Hydrogen Carriers

Southall

Lukashuk

2022

Johnson Matthey Technology Review

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Reliable storage and transportation of hydrogen at scale is a challenge which needs to be tackled to allow a robust and on-demand hydrogen supply when moving towards a global low carbon hydrogen economy with the aim of meeting net-zero climate goals. Numerous technologies and options are currently being explored for effective hydrogen storage and transportation to facilitate a smooth transition to the hydrogen economy. This paper provides an overview of different hydrogen storage and transportation technologies, focusing in more detail on liquid organic hydrogen carriers (LOHCs), its advantages and disadvantages, and future considerations for the optimisation of the LOHC technology.

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New means of hydrogen storage – the potentials of methanol as energy storage for excessive windpower in North Germany

Cited by 2 publications

References 4 publications

A Swiss-Roll-Type Methanol Mini-Steam Reformer for Hydrogen Generation with High Efficiency and Long-Term Durability

A Swiss-Roll-Type Methanol Mini-Steam Reformer for Hydrogen Generation with High Efficiency and Long-Term Durability

Hydrogen Storage and Transportation Technologies to Enable the Hydrogen Economy: Liquid Organic Hydrogen Carriers

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