PEL has developed Residential ANG fuel storage system as a new technology solution to the problem identified by the Global Alliance for Clean Cookstoves. Our product is a portable ANG cylinder that is equivalent in energy content to the 3 KG LPG cylinder. It holds 125 scf of gas, which should be sufficient for 5-7 days usage by a household for its cooking needs. Our system is design to ASME standards, and is undergoing ASME certification.
ANG utilizes a process that accumulates gas on the surface of a solid or a liquid and thereby forms a film of molecules. Similar to surface tension, adsorption is a consequence of surface energy. In a bulk material, other atoms in the material fill all the bonding requirements of the atoms of the material. However, atoms on the surface of the adsorbent are not wholly surrounded by other adsorbent atoms and therefore can store gas molecules. ANG uses an activated carbon material, which allows for the storage of NG at substantially higher volumetric capacities than pressurized storage using CNG technology at an equivalent pressure. Because ANG does not require cooling or high compression, the infrastructure required to facilitate gas processing and loading would have significantly lower capital and operating costs compared to CNG and LNG.
PEL's residential ANG system combined with the LPG delivery business model, allows NG to be commercialized in a manner very similar to residential LPG deliveries. As shown in the figure below, the value chains are almost identical.
Figure: ANG and LPG Value Chains
Source: PEL internal assessment