Adsorption technology for the storage of natural gas and biomethane from biogas

Abstract

SUMMARYAs natural gas, biogas has been used for nobler purposes in recent years, such as the use of purified biogas (biomethane) in the transport sector. Currently, natural gas storage for use in transportation is accomplished primarily through compressed natural gas (CNG) technologies and liquefied natural gas (LNG), which require large amounts of energy. In recent years, the storage technology of absorbed natural gas (ANG) on porous materials has been studied, fundamentally highlighted by reduced energy use and increased safety in the transport of gaseous fuel. In this sense, the present study aimed to gather information about the main adsorbent materials which are being studied and the conditions normally employed in surveys that use ANG technology, as well as pointing out the main challenges for the storage of biogas in the adsorbed form at low pressures and room temperature in an attempt to meet the target of 180 V/V established by Department of Energy. Researchers reported high storage capacities in moderate conditions of temperature and pressure; however, the biggest challenge of the research involving methane adsorbed is also achieving high rates of desorption with the lowest possible energy expenditure.

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

“…Adsorbed natural gas is a promising gas storage technology in which natural gas is adsorbed into a porous solid material at relatively low pressure (35-40 bar) and room temperature [709]. Compared with compressed and liquefied natural gas storage, the energy consumption is lower, whereas safety is increased, especially for transport fuel application [710]. Adsorbent materials should have a high surface area that ranges between 1000 m 2 /g for low-grade materials and 3000 m 2 /g for high quality upgraded materials, high porosity and fast rate of charge and discharge [711].…”

Understanding the influence of the alkaline cation K + or Na + in the regeneration efficiency of a biogas upgrading unit

“…Biogas is obtained through the anaerobic digestion of biomass . Regarding biogas composition, it is mainly composed of methane (CH 4 ) and carbon dioxide (CO 2 ), in an approximate percentage of 60% and 40%, respectively . After a complete upgrading for CO 2 removal, biomethane is obtained from biogas as a valuable product .…”

“…5 Regarding biogas composition, it is mainly composed of methane (CH 4 ) and carbon dioxide (CO 2 ), in an approximate percentage of 60% and 40%, respectively. [6][7][8] After a complete upgrading for CO 2 removal, biomethane is obtained from biogas as a valuable product. 9 Biomethane uses include heat or electricity production, natural gas substitute, compressed natural gas, and diesel replacement alongside liquid natural gas after a compression stage.…”

Activated Nanoporous Carbon from walnut shell as a Promising Adsorbent for Methane Storage in ANG Technology

“…Since natural gas is mainly composed of methane (CH 4 > 90%), many studies have been focused on methane adsorption as a clean and e cient energy source instead of multi-component natural gas [15,16,34,35]. CH 4 adsorption on activated carbon has been studied by using di erent sources; Azevedo et al [36] and Arami-Niya et al [37] investigated coconut shell and oil palm shell, respectively.…”