|ANG storage material. Click to enlarge. Source: Energtek|
Energtek Inc., the Department of Energy (DOE) of the Republic of the Philippines, and the Philippines National Oil Company Exploration Corporation launched a project for the conversion of three-wheel vehicles to natural gas-powered systems with adsorbed natural gas (ANG) storage, in the Republic of the Philippines.
Energtek’s adsorbed natural gas (ANG) technology addresses the two and three wheel vehicles market, which represents the fastest growing segment of the world automotive market. Most of the vehicles in this segment—currently estimated at about 200,000,000 units—are in Asia.
The conversion to natural gas provides significant economic advantages to the vehicles’ owners, and at the same time provides significant environmental improvements through the reduction of harmful emissions.
The ANG technology allows storing natural gas under lower pressures than compressed natural gas (CNG) technology, the prevalent storage technology for natural gas vehicles (NGV). Utilizing ANG technology vastly improves refueling expenses and allows for a more efficient use of the vehicle’s space. The lower pressure used by ANG technology also allows significant savings in the infrastructure costs of filling stations.
In a conventional high-pressure storage tank, gas is forced into the tank under pressure. The maximum pressure, and therefore volume of gas held in the tank, is limited by the physical properties of the tank and its valve. The addition of a microporous material, such as activated carbon, into the tank makes it possible to do one of two things:
Store a larger volume of gas in the same container, at the same pressure.
Store the same volume of gas in the container at a lower pressure.
Energtek’s ANG technology comes via its acquisition Angstore. (Earlier post.) Energtek purchased a controlling interest in Angstore; in August, it purchased full ownership.