The use of excellent performance of the adsorbent on the selective adsorption of oil and gas recovery, is an effective oil and gas recovery technology, and adsorbent selection is the key to this technology. Activated carbon is a hydrophobic adsorbent with non-polar surface structure that is particularly suitable for the recovery of hydrocarbons from gas or liquid mixtures. The adsorption capacity of activated carbon is related to its surface area, pore volume, particle size distribution and other major physical structure parameters. Activated carbon for oil and gas recovery requires large developed pore volume, in addition to its strong adsorption capacity, it also needs to have high desorption capacity, high strength, abrasion resistance and air permeability.
In order to prevent the fuel from being wasted and polluting air, installation of carbon canisters filled with activated charcoal on automobiles is required to adsorb the gasoline vapors so as to prevent the volatilization of fuel oil.
As the adsorption capacity of activated carbon and desorption capacity are not necessarily related, which means that general adsorption parameters such as iodine value, methylene blue adsorption, CCI4 can not accurately characterize the ability of activated carbon recovery of gasoline, so the current internationally accepted detection index is Butane Working Capacity(BWC). The results show that the adsorption capacity of butane by activated charcoal is affected by its specific surface area and pore volume, especially the pore volume, so increasing the mesopore pore volume and specific surface area of micro-pore is important to improve the butane adsorption performance.
The activated carbon used for oil and gas recovery are generally activated carbon pellets and granular activated carbon, its production process is different from the common activated carbon.