Nanostructured carbon materials for adsorption of methane and other gases

摘要

Provided are methods for storing gases on porous adsorbents, methods for optimizing the storage of gases on porous adsorbents, methods of making porous adsorbents, and methods of gas storage of optimized compositions, as in systems containing porous adsorbents and gas adsorbed on the surface of the porous adsorbent. The disclosed methods and systems feature a constant or increasing isosteric enthalpy of adsorption as a function of uptake of the gas onto the exposed surface of a porous adsorbent. Adsorbents with a porous geometry and surface dimensions suited to a particular adsorbate are exposed to the gas at elevated pressures in the specific regime where n/V (density) is larger than predicted by the ideal gas law by more than several percent.

主权项

1. A method for storing a gas on a porous adsorbent, the method comprising the steps of:
selecting said porous adsorbent having a first chemical composition; determining a first pore size distribution for the porous adsorbent having the first chemical composition, wherein the first pore size distribution provides a constant or increasing isosteric enthalpy of adsorption as a function of uptake of the gas on an exposed surface of the porous adsorbent; providing the porous adsorbent having a first plurality of ordered pore structures characterized by the first pore size distribution; and contacting the porous adsorbent with the gas at a pressure sufficient to achieve adsorption of the gas on the porous adsorbent characterized by the constant or increasing isosteric enthalpy of adsorption as a function of uptake of the gas, thereby storing the gas on the porous adsorbent.