Monolith Fabrication and Micropore Characterization of Active Carbons forAdsorbed Natural Gas Storage. Annual Report, May 1993-April 1994

摘要

Absorbed natural gas (ANG) storage has attracted interest as an alternative tohigh pressure compressed natural gas (CNG) storage for applications such as natural vehicle (NGV) fuel storage systems. Most previous work has focussed on the use of active carbon powders where the volume occupied by interparticular void space, macropores (diameter > 50 nm) and mesopores (50 nm > diameter 2 nm) may amount for more than 50% of the total storage vessel volume. This project aims to minimize this inactive volume through the development of carbon monoliths which possess minimal void, macropore and mesopore volume and, at the same time, produce micropores with diameters approaching the theoretically determined optimum (1.14 nm). Three different approaches to monolith production were trialed: binderless extrusion, binderless briquetting, and high pressure briquetting.