Abstract
Deploying affordable and sustainable energy storage devices is one of the major pillars for changing the current energy systems. Natural gas (NG)/bio-methane storage for vehicle transportation is an existing technology where the gas is pressurized up to 250 bar. One possibility to reduce the compression and infrastructure costs of new installations is to use tanks filled with porous solids that can selectively adsorb and release methane. This is the so-called Adsorbed Natural Gas (ANG) concept, where pressure of storage is reduced to 30–60 bar while the energy density per tank volume is maintained.Many publications have focused on the development of a suitable material with pre-defined specifications on amount of methane adsorbed. There are much less publications dealing with the testing of these materials in a current device and even less publications on the implementation of an entire system for ANG. This publication provides a modelling approach with the view of the different stages of development of the ANG concept, from materials to the system. An example of methane storage in a reference adsorbent material (high-surface area activated carbon) is used to validate existing phenomena in the different models used.
Highlights
Energy storage is one of the major pillars for improving the current energy systems [1]
This model is only recommended in case of having devices for thermal management that can result in loss of symmetry or for the last fine tuning in terms of development
A modelling approach is used to understand the different needs for designing a device for methane storage using porous adsorbents
Summary
Energy storage is one of the major pillars for improving the current energy systems [1]. In pioneering places where the options have already been taken, it may not be economically feasible to change them in the very near-term What these technologies have shown is that is feasible and safe to store and use NG for vehicular transport. In new markets where methane or bio-methane can be considered as a vehicular fuel, there is a possibility of using mass-transfer agents for enhancing the capacity of storage tanks while reducing the pressure of loading. In ANG technology, a porous material prone to adsorb methane is loaded in the storage tank, allowing a much higher methane density than in the gas phase. We want to highlight that is only through symbiosis between novel materials and engineering developments that a final storage device for ANG technologies can be deployed to the market. In order to demonstrate involved phenomena, the mathematical models were calibrated with ANG experiments made with highpurity methane adsorbed in a high surface area activated carbon
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